The Issue I am currently facing is, I would like Keep the HMTL Table Structure I currently have, if at all possible.I would like tp dynamically create this table instead of doing so at the HTML level. I would Like to do so dynamically at the data level. Originally I had created a table via the ASPX page, and then I realized that I would have to go back and dynamically add in new revised row changes. This got ugly really quickly. my plan was to traverse each row in the table until i found the place I wanted to add a new row of data, but then I realized that it would mess up the columns to the right of the data, causing unwanted gaps if I added anything in the first 2 columns. I tried this code originally:
For Each row As HtmlTableRow In tblDates.Rows
For Each col As HtmlTableCell In tblDates.Columns
If col.ID = "lblSubmittedToESO" Then
tblDates.InnerHtml += "<tr> "
tblDates.InnerHtml += "<td> <asp:Label ID='lblSubmittedToESO' runat='server' Text='Date Site Plan Submitted to ESO for Approval: '></asp:Label></td>"
tblDates.InnerHtml += ""
tblDates.InnerHtml += ""
tblDates.InnerHtml += "</tr>"
End If
Next
Next
However, as you already know.. this did not work as there was no such thing as "tblDates.Columns". The original structure of my table is as follows:
<table id="tblDates" runat ="server" border="1">
<tr id ="tblDatesHeader">
<td>
</td>
<td align="center">
<asp:Label ID="lblDate" runat="server" Text="Date" Font-Bold="true"></asp:Label>
<br />
<asp:Label ID="lblDateFormat" runat="server" Text="(MM/DD/YYYY)" Font-Bold="true"></asp:Label>
</td>
<td colspan="2" align="center">
<asp:Label ID="lblNumOfDays" runat="server" Text="Number of Days to Complete Action"
Font-Bold="true"></asp:Label>
</td>
</tr>
<tr id ="ECOSubmitRow">
<td>
<asp:Label ID="lblSubmittedToECO" runat="server" Text="Date Site Plan Submitted to ECO for Approval: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtSubmittedToECO" runat="server"></asp:TextBox>
</td>
<td>
<asp:Label ID="lblPMO" runat="server" Text="PWO: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtPMO" runat="server"></asp:TextBox>
</td>
</tr>
<tr id ="ECOSignedRow">
<td>
<asp:Label ID="lblSignedByECO" runat="server" Text="Date Site Plan Signed by ECO: "></asp:Label> <img src="img/help_bubble.gif" id="helpbubble5" alt="" />
</td>
<td>
<asp:TextBox ID="txtSignedByECO" runat="server"></asp:TextBox>
</td>
<td>
<asp:Label ID="lblECO" runat="server" Text="ESO: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtECO" runat="server"></asp:TextBox>
</td>
</tr>
<tr id ="PMOSubmitRow">
<td>
<asp:Label ID="lblSubmittedToPMO" runat="server" Text="Date Site Plan Submitted to PMO for Approval: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtSubmittedToPMO" runat="server"></asp:TextBox>
</td>
<td>
<asp:Label ID="lblPMOECO" runat="server" Text="PMO/ECO sign to EED/MSC: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtPMOECO" runat="server"></asp:TextBox>
</td>
</tr>
<tr id ="PMOSignedRow">
<td>
<asp:Label ID="lblSignedByPMO" runat="server" Text="Date Site Plan Signed by PMO: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtSignedByPMO" runat="server"></asp:TextBox>
</td>
<td>
<asp:Label ID="lblEED" runat="server" Text="EED/MSC: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtEED" runat="server"></asp:TextBox>
</td>
</tr>
<tr id ="EEDSubmitRow">
<td>
<asp:Label ID="lblSubmittedToEED" runat="server" Text="Date Plan Submitted to EED for Endorsement: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtSubmittedToEED" runat="server"></asp:TextBox>
</td>
<td>
<asp:Label ID="lblABA" runat="server" Text="ABA: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtABA" runat="server"></asp:TextBox>
</td>
</tr>
<tr id ="EEDEndorcedRow">
<td>
<asp:Label ID="lblEndorsedByEED" runat="server" Text="Date Endorsed by EED/MSC and Forwarded to ABA: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtEndorsedByEED" runat="server"></asp:TextBox>
</td>
<td>
<asp:Label ID="lblOverallCycle" runat="server" Text="Project Overall Cycle Time: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtOverallCycle" runat="server"></asp:TextBox>
</td>
</tr>
<tr id ="ActionRow">
<td>
<asp:Label ID="lblABAaction" runat="server" Text="Date of ABA Action (Endorsement/Approval/Return): "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtABAaction" runat="server"></asp:TextBox>
</td>
</tr>
<tr id ="InitDateRow">
<td>
<asp:Label ID="lblABAAAIInitDate" runat="server" Text="Inititial Date AAI was Issued: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtInitAAIDate" runat="server"></asp:TextBox>
</td>
</tr>
<tr id ="AAISubmitRow">
<td>
<asp:Label ID="lblAAISubmitted" runat="server" Text="Date Request Information Submitted: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtFIDate" runat="server"></asp:TextBox>
</td>
<td>
<asp:Label ID="lblFIDays" runat="server" Text="RFI Overall Days: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtRFITotal" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
</td>
<td>
</td>
</tr>
<tr>
<td>
</td>
<td>
</td>
<td>
</td>
<td>
</td>
</tr>
<tr align="center">
<td colspan="2">
<asp:Label ID="lblRating" runat="server" Text="Rating (see note):" Font-Bold="true"></asp:Label>
</td>
<td>
<asp:Label ID="lblEEDEval" runat="server" Text="FEC or MCSC<br>Evaluation<br>Score: 0-100"
Font-Bold="true" Width="200px"></asp:Label>
</td>
<td>
<asp:Label ID="lblSSAEval" runat="server" Text="SSA<br>Evaluation<br>Score: 0-100"
Font-Bold="true"></asp:Label>
</td>
</tr>
<tr align="center">
<td colspan="2">
<asp:Label ID="lblOverall" runat="server" Text="Overall Score From Evaluation on Next Page:"></asp:Label>
</td>
<td align="center">
<asp:TextBox ID="txtFECOverall" runat="server" Width="40px"></asp:TextBox>
</td>
<td align="center">
<asp:TextBox ID="txtNossaOverall" runat="server" Width="40px"></asp:TextBox>
</td>
</tr>
</table>
So right now I have 4 stored procedures that pull dates for 4 different process. what I would like to is dynamically create this table and add the dates that I have already pulled and stored into objects and place them in this table in their specific position. Originally once I pulled the date I just added them in by referencing the "ID" of the . Normally it would be just adding a datasource and populating the table with that once source, but I would also like to design the layout. Attached to this question is a link for image to show what it looks like when I orginally created it. However, Now I would like to build it dynamically. Sample Table Output of Table Originally
Is there away to design the table this way, layout-wise?
Well, the issue (and difficult challenge) is that you thinking of a table in HTML and markup on the page. The problem is that 'table' as HTML is just markup, and as a result, REALLY difficult to work with.
So, what you want to do is at a conceptial level split out (seperate) your UI display of the table, and the the actual table you create in code.
So, think of the problem this way:
code + a table in memory.
HTML markup - display of the table.
So, once we split the two concepts?
Well, now you create that table, add rows to that table, maybe loop and sum a column on that table.
AND THEN display + render the results of that table.
Note the separation here. We have a data table. We do whatever we want with that table, AND THEN RENDER the table in HTML.
Note how we thus don't try to loop, try to modify, try to change the HTML table. (its too painful).
The other bonus? Well, in most cases we can assume you have a database. Thus, once again, the concept of the data, the data operations are 100% separate from what we going to display to the UI.
So, think data table operations. Do whatever.
THEN we render + display that table.
The above also means then we can use one of the "many" data repeating controls to do all the heavy lifting of the "display", but the code never really hits, touches, and attempts to modify the HTML - we only "render" the data AFTER we done our data operations.
if you break the above concept (data operations, and HMTL UI operations), then you have to start writing boatloads of code to try and update the HTML, but worse, the HTML is ONLY a representation of that internal data table anyway.
So, MUCH less work to do data operations, and when done, then just have asp.net do this:
Mr. asp.net, can you now just display my table for me? (especially after I done my data operations).
Since asp.net net can render + display that data table, and do so without looping or me having to write that code, then that's the approach I recommend.
my plan was to traverse each row in the table until i found the place I wanted to add a new row of data,
Caution!!!! - you don't really have a "place" in your data. You add a row of data to the system, and then query or pull or sort the data in the order you want. Data operations as a general rule does NOT have a order. You might have some invoice number, or some other column that you can (or want to) sort on, but again, thinking of data like old style punched cards in which order matters is a LESS then ideal way to think of data.
Your data is a bucket of rows. You do operations against that data, and THEN send it to the browser to be rendered as a table. Again, note the concept that we have data - a thing that is separate from display. As noted, we don't want to try and think of HTML as some table - it is ONLY for display - its only markup.
So, the first issue we deal with?
Where and how did this data come from in the first place? I mean, it rare as a cold day in hell that the data JUST appears out of now place. So, first up, is do you have, or are you using a database? (and note that since you NOT talked about that database system, this is the VERY reason why you are struggling here).
So, I can pick a repeater, GridView, ListView (my favorite), or many more controls that can display this data for you, but manipulation of the data? Nope - that occurs at the data level - not the UI level. Keep these two concepts separate.
So, where is this data coming from in the first place? Do you have this as a data table and database some place? I mean, you posted a screen shot of the data, but it can't just appear by magic, can it?
So, this is the first issue, first order of the day. Where is this data coming from? That's the first part of this puzzle. That data resides some place, and that is a good thing, but it not a HTML table - it is some data in a system that exists some place, and that is our starting point for this. Be this ms-access, FoxPro, Excel or some such?
that data comes from some place, and it exists. It would not make sense that every time we launch the program, that we re-type the data all over again. So, the where, the when, and the source of this data?
Note how you LEFT OUT this detail!!!! - and that's why we are struggling here!
So, say I have a table with some hotels. Well, then I can render (display) the data as some type of HTML table - and might as well let asp.net do that dirty work for us.
So, say we have this markup. In fact, I used the wizard, AND THEN blew out the sql data source that gets placed on the page (I want more control over the data with code).
So, say we have this markup:
<div id="MyGrid" runat="server" style="width:40%">
<asp:Button ID="cmdAdd" runat="server" Text="+Add New" CssClass="btn" />
<asp:GridView ID="GHotels" runat="server" AutoGenerateColumns="False"
DataKeyNames="ID" CssClass="table">
<Columns>
<asp:BoundField DataField="FirstName" HeaderText="FirstName" />
<asp:BoundField DataField="LastName" HeaderText="LastName" />
<asp:BoundField DataField="HotelName" HeaderText="HotelName" />
<asp:BoundField DataField="Description" HeaderText="Description" />
<asp:TemplateField HeaderText="Edit">
<ItemTemplate>
<asp:Button ID="cmdEdit" runat="server" Text="Edit" CssClass="btn"
OnClick="cmdEdit_Click" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<br />
</div>
So, I dropped in a grid view. (but, with your sample markup, a listView probably is better).
Now, we have this code to load up the above:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
LoadGrid()
End If
End Sub
Sub LoadGrid()
Dim cmdSQL As New SqlCommand("SELECT * FROM tblHotelsA ORDER BY HotelName")
Dim rstData as DataTable = MyrstP(cmdSQL)
GHotels.DataSource = rstData
GHotels.DataBind()
End Sub
Public Function MyrstP(sqlCmd As SqlCommand) As DataTable
Dim rstData As New DataTable
Using sqlCmd
Using conn = New SqlConnection(My.Settings.TEST4)
conn.Open()
sqlCmd.Connection = conn
rstData.Load(sqlCmd.ExecuteReader)
End Using
End Using
Return rstData
End Function
Ok, and now we have this:
Note careful:
We did not write loops to load up the HTML.
We use the ado.net data table to get the data. And THEN SEND that data table to the HTML system to display.
Note how we NOT directly working with the HMTL - since well, it is JUST HTML, and as NO business try to be a data system for us - but is great for display!
So, in above, we have a add new button at the top. That could allow us to add a new row to the data base. But, once again, we would add the new row, and then AGAIN send that data (and our new row) to the Gridview, but AGAIN we don't write HTML, we don't try to modify the HTML, and we still have 100% data operations.
Now, no question we might need some markup to edit a single row. That markup to edit ONE row can then be used for our "edit" button, and even our add new button.
So, markup can be used for data entery, but for display of the table and data? That goes and belongs in the database.
So, in above, we might below the grid, drop in some markup that allows edit of one row.
Say, like this:
<div id="EditRecord" runat="server" style="float:left;display: normal" clientidmode="Static" >
<style>
.iForm label {display:inline-block;width:90px}
.iForm input {border-radius:8px;border-width:1px;margin-bottom:10px}
.iForm textarea {border-radius:8px;border-width:1px;margin-bottom:10px}
.iForm input[type=checkbox] {margin-right:8px}
</style>
<div style="float:left" class="iForm">
<label>HotelName</label><asp:TextBox ID="txtHotel" runat="server" f="HOtelName" width="280"></asp:TextBox> <br />
<label>First Name</label><asp:TextBox ID="tFN" runat="server" f="FirstName" Width="140"></asp:TextBox> <br />
<label>Last Name</label><asp:TextBox ID="tLN" runat="server" f="LastName" Width="140"></asp:TextBox> <br />
<label>City</label><asp:TextBox ID="tCity" runat="server" f="City" Width="140"></asp:TextBox> <br />
<label>Province</label><asp:TextBox ID="tProvince" runat="server" f="Province" Width="75"></asp:TextBox> <br />
</div>
<div style="float:left;margin-left:20px" class="iForm">
<label>Description</label> <br />
<asp:TextBox ID="txtNotes" runat="server" Width="400" TextMode="MultiLine"
Height="150px" f="Description" ></asp:TextBox> <br />
<asp:CheckBox ID="chkActive" f="Active" Text=" Active" runat="server" TextAlign="Right" />
<asp:CheckBox ID="chkBalcony" f="Balcony" Text=" Has Balcony" runat="server" TextAlign="Right" />
</div>
<div style="clear:both"></div>
<button id="cmdSave" runat="server" class="btn" onserverclick="cmdSave_ServerClick" >
<span aria-hidden="true" class="glyphicon glyphicon-floppy-saved"> Save</span>
</button>
<button id="cmdCancel" runat="server" class="btn" style="margin-left:15px"
onserverclick="cmdCancel_ServerClick"
>
<span aria-hidden="true" class="glyphicon glyphicon-arrow-left"> Back/Cancel</span>
</button>
<button id="cmdDelete" runat="server" class="btn" style="margin-left:15px">
<span aria-hidden="true" class="glyphicon glyphicon-trash"> Delete</span>
</button>
</div>
So, that is some markup, and then we have tht button click for each row.
Our code for that click can look like this:
Protected Sub cmdEdit_Click(sender As Object, e As EventArgs)
Dim btn As Button = sender
Dim gRow As GridViewRow = btn.NamingContainer
Dim pkID = GHotels.DataKeys(gRow.RowIndex).Item("ID")
Dim cmdSQL As New SqlCommand("SELECT * from tblHotelsA where ID = #ID")
cmdSQL.Parameters.Add("#ID", SqlDbType.Int).Value = pkID
Dim rstData As DataTable = MyrstP(cmdSQL)
Call fLoader(Me.EditRecord, rstData.Rows(0)) ' load up hidden div with data
' hide grid
MyGrid.Style.Add("display", "none")
EditRecord.Style.Add("display", "normal")
ViewState("rstData") = rstData
End Sub
Again, note how we do data operations against the database - NOT the HTML table!!! - we certainly did use the "UI" and row click of the grid to get that one row to work on, but after that we RIGHT BACK to useing datatable, and data operations against the database and NOT AGAINST the HTML markup.
So, when you click on a row, we get the row "PK" data id, pull the data, load up some controls on the page, hide the grid, show the "div" that has above. We now get this:
Now, this post is already a bit long, and I could post more code. So, in above, the save button would:
Send data back to database (again, database - not touch the grid view or "table"
Then we re-load the grid view from database
Then we hide our div to edit, and show the div with the grid view to display any edits we made.
this code:
Protected Sub cmdSave_ServerClick(sender As Object, e As EventArgs)
Dim rstData As DataTable = ViewState("rstData")
Call fWriterW(EditRecord, rstData.Rows(0)) ' div to table
Call SaveTable(rstData, "tblHotelsA") ' send table back to database
LoadGrid() ' refresh grid
MyGrid.Style.Add("display", "normal")
EditRecord.Style.Add("display", "none")
End Sub
So, the FIRST question we have and need to know here?
Where is your data now, how do you plan to load + read this data. This is the first step, and worry about some HTML markup to display that data actually is the easy part - but the source and getting that data - now that's the important part of this question and process.
I should note that I come from a ms-access, VB6, FoxPro background (desktop). So, you note the above style of code - looks a lot like VBA due to my roots. But, I did make + build a few helper routines used above, (like fLoader, fWirter) that makes such code easy to write.
So, your first issue? Where does the data come from now, and have you setup a valid connection and means to pull that data into a "data table", of which we THEN can send to the browser as HTML.
Edit -- I see you note that you have 4 store procedures. So yes then you can pull that data to a datatable, and then send that datatable to a GridView or say a listview.
In fact, given your existing markup, then I would suggest a listview. As noted, I often use the wizard to build the listview (or gridview). I then blow out (delete) the sql data source that the wizard creates, and as noted, removed the extra templates.
So, you have a table layout that would work quite well as a ListView.
So, taking your existing markup, say this:
It will look somthing like this:
<div style="width:60%;padding:25px">
<asp:ListView ID="ListView1" runat="server" DataKeyNames="ID" >
<LayoutTemplate>
<table id="itemPlaceholderContainer" runat="server" border="0" class="table table-hover table-bordered" >
<tr runat="server" style="">
<th runat="server">Site Plan</th>
<th runat="server" style="text-align:center">Date<br />(MM/DD/YYYY)</th>
<th runat="server" colspan="2">Number of Days to Complete Action</th>
<th runat="server">PWO</th>
</tr>
<tr id="itemPlaceholder" runat="server">
</tr>
</table>
</LayoutTemplate>
<ItemTemplate>
<tr id ="ECOSubmitRow">
<td>
<asp:Label ID="lblSubmittedToECO" runat="server" Text="Site Plan Submitted to ECO for Approval: "></asp:Label>
</td>
<td>
<asp:Label ID="PlanDate" runat="server" Text="MM/DD/YYYY"></asp:Label>
</td>
<td>
<asp:Label ID="lblPMO" runat="server" Text="PWO: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtPMO" runat="server"></asp:TextBox>
</td>
</tr>
</ItemTemplate>
</asp:ListView>
So, we have kind of this now:
and in fact, for the actual data, we only need ONE row.
so, looking at this, note how I suggested a list view.
I don't have your data - so, I can't really do a lot in a simple post on SO but lets re-create the first hotel grid, but using the List view.
Note how the layout is "very" simular to a table.
So, for the Hotel grid, using a ListView, then we have this:
<asp:ListView ID="ListView1" runat="server" DataKeyNames="ID" >
<LayoutTemplate>
<table id="itemPlaceholderContainer" runat="server" border="0" class="table table-bordered">
<tr runat="server" style="">
<th runat="server">FirstName</th>
<th runat="server">LastName</th>
<th runat="server">HotelName</th>
<th runat="server">Active</th>
<th runat="server">Description</th>
</tr>
<tr id="itemPlaceholder" runat="server">
</tr>
</table>
</LayoutTemplate>
<ItemTemplate>
<tr style="">
<td><asp:Label ID="FirstNameLabel" runat="server" Text='<%# Eval("FirstName") %>' /></td>
<td><asp:Label ID="LastNameLabel" runat="server" Text='<%# Eval("LastName") %>' /></td>
<td><asp:Label ID="HotelNameLabel" runat="server" Text='<%# Eval("HotelName") %>' /></td>
<td style="text-align:center">
<asp:CheckBox ID="ActiveCheckBox" runat="server" Checked='<%# Eval("Active") %>' />
</td>
<td><asp:Label ID="DescriptionLabel" runat="server" Text='<%# Eval("Description") %>' /></td>
</tr>
</ItemTemplate>
</asp:ListView>
Note again, VERY simular to a HTML table, but we use ListView, since it is like GridView a data bound control. And we can then feed it that data table.
So, my code to load this list view, is this:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
LoadGrid
End If
End Sub
Sub LoadGrid()
Dim cmdSQL = New SqlCommand("SELECT * FROM tblHotelsA ORDER BY HotelName")
Dim rstData As DataTable
rstData = MyrstP(cmdSQL)
ListView1.DataSource = rstData
ListView1.DataBind()
End Sub
And I get this:
So, while the GridView is "quick and dirty" as you layout becomes a little more complex, then ListView becomes a better choice - and its layout VERY much follows a HTML table, but the big deal is of course that you can feed it a data table - so, we don't try to create the HTML table or markup - we setup a layout, and feed it that data table.
I am using an asp TextBox control with its TextChanged event and my goal is to capture text as a user enters it. If there are one or more characters entered, I would like a button control to be enabled without the user having to leave the TextBox control.
My source code for the TextBox on the aspx page is
<asp:TextBox ID="NewSpendingCategoryTextBox" MaxLength="12" runat="server"
AutoPostBack="True"
OnTextChanged="NewSpendingCategoryTextBox_TextChanged"
ViewStateMode="Enabled" >
</asp:TextBox>
and my source code on the code behind page is
Protected Sub NewSpendingCategoryTextBox_TextChanged(sender As Object, e As System.EventArgs) Handles NewSpendingCategoryTextBox.TextChanged
Dim strSpendingCategoryTextBox As String = Nothing
strSpendingCategoryTextBox = NewSpendingCategoryTextBox.Text
If strSpendingCategoryTextBox.Length <= 0 Then
Me.NewSpendingCategoryInsertButton.Enabled = False
Else 'strSpendingCategoryTextBox.Length > 0
Me.NewSpendingCategoryInsertButton.Enabled = True
End If 'strSpendingCategoryTextBox.Length <= 0
End Sub
So it appears I have to use javascript to enable or disable the insert button. Can someone guide me on how to get an element within a table? The table sits in a Panel as well.
below is the aspx code...
<asp:Panel ID="AddSpendingCategoryPanel" Visible="false" runat="server">
<table class="AddNewTable">
<tbody>
<tr>
<td>
<asp:Label ID="lblSpend" runat="server"
Text="Spending Category:">
</asp:Label>
</td>
<td>
<asp:TextBox ID="txtSpend" MaxLength="12"
runat="server"
AutoPostBack="True"
OnTextChanged="txtSpend_TextChanged"
OnKeyDown="return CheckSpendTextBoxValue()"
ViewStateMode="Enabled" >
</asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp:Button CssClass="frmbtn" ID="btnInsertSpend"
runat="server" Text="Insert" />
</td>
<td>
<asp:Button CssClass="frmbtn" ID="btnCancelSpend"
runat="server" Text="Cancel"
CausesValidation="False" />
</td>
</tr>
</tbody>
</table>
</asp:Panel>
Run this code in the OnKeyPress event or consider JavaScript. The textbox does not fire the Text_Changed event til Tab or Enter are used.
Simplify the boolean check.
Me.NewSpendingCategoryInsertButton.Enabled = (NewSpendingCategoryTextBox.Text.Length <> 0)
I'm not sure exactly how you would do it. But the ASP.NET code is executed on the server that is hosting the web page.
I'd highly recommended doing it on JavaScript which can be run client side. Hopefully this article is of use to you.
How to check if a textbox is empty using javascript
I have a ASP.NET web app, which uses SSRS 2008 R2 on another machine in Native mode. The app has a page for generation reports created in SSRS.
I use my own custom controls for report parameters. After all the parameters are set, the page generates the report using a hidden ReportViewer control.
Here is the page layout:
<asp:Repeater ID="rptParameters" runat="server">
<ItemTemplate>
<tr>
<td class="label">
<asp:Literal ID="label" runat="server"/>:
</td>
<td class="control">
<asp:TextBox ID="tbx" runat="server" Visible="false"/>
<my:tsJCalendar ID="calendar" runat="server" GeneratePostback="false" HasValidation="true" ErrorDisplay="None" CompareMessage="Date must be in valid 'mm/dd/yyyy' format!" Visible="false"/>
<asp:RadioButtonList ID="radioList" runat="server" Visible="false"
RepeatDirection="Horizontal" RepeatLayout="Flow">
<asp:ListItem Text="True" Value="1"></asp:ListItem>
<asp:ListItem Text="False" Value="0"></asp:ListItem>
</asp:RadioButtonList>
<asp:DropDownList ID="ddl" runat="server" Visible="false"></asp:DropDownList>
<asp:HiddenField ID="hdnForDdl" runat="server"/>
</td>
<td width="22px"></td>
</ItemTemplate>
<AlternatingItemTemplate>
<td class="label">
<asp:Literal ID="label" runat="server"/>:
</td>
<td class="control">
<asp:TextBox ID="tbx" runat="server" Visible="false"/>
<my:tsJCalendar ID="calendar" runat="server" GeneratePostback="false" HasValidation="True" ErrorDisplay="None" CompareMessage="Date must be in valid 'mm/dd/yyyy' format!" Visible="false"/>
<asp:RadioButtonList ID="radioList" runat="server" Visible="false">
<asp:ListItem Text="True" Value="1"></asp:ListItem>
<asp:ListItem Text="False" Value="0"></asp:ListItem>
</asp:RadioButtonList>
<asp:DropDownList ID="ddl" runat="server" Visible="false"></asp:DropDownList>
<asp:HiddenField ID="hdnForDdl" runat="server"/>
</td>
</tr>
</AlternatingItemTemplate>
</asp:Repeater>
<rsweb:ReportViewer ID="rvReports" runat="server" Width="100%"
ShowReportBody="False" ShowPromptAreaButton="false" ShowWaitControlCancelLink="false"
AsyncRendering="false" Visible="false">
</rsweb:ReportViewer>
<hr />
<asp:Button ID="btnRun" runat="server" Text="Run Report" />
To generate custom parameter controls I use the repeater and show an appropriate control according by the report parameter type.
I am working with SSRS using its ReportingService2005 webservice. E.g. on the first page loading, I am getting report parameters using this code:
Private Function GetParameterReports(values As ParameterValue()) As ReportParameter()
Dim rs As New ReportingService2005()
rs.Credentials = New MyReportCredentials().NetworkCredentials
Dim forRendering As Boolean = True
Dim historyID As String = Nothing
Dim credentials As DataSourceCredentials() = Nothing
Dim paramInfos As ReportParameter() = rs.GetReportParameters(ReportPath, historyID, forRendering, values, credentials)
Return paramInfos
End Function
The 'values' parameter is Nothing for the first time. However, if a parameter depends on other parameters, I do a postback, and pass report values to the report to get updated parameters, using the same GetParameterReports() method.
All the reports have a special field, 'user_id', which is the identifier of the logged in user. I must set this parameter manually in the code, and I am trying to do this by using 2 ways:
Dim Values As New List(Of ParameterValue)()
Dim singleUserParameter As New ParameterValue()
With singleUserParameter
.Name = "user_id"
.Value = Security.CurrentUserPeopleID
End With
Values.Add(singleUserParameter)
paramInfos = GetParameterReports(Values.ToArray)
and
Dim userIdParameter As New ReportParameter()
userIdParameter.DefaultValues = New String() {Security.CurrentUserPeopleID.ToString()}
userIdParameter.PromptUser = False
Dim rs As New ReportingService2005()
rs.Credentials = New MyReportCredentials().NetworkCredentials
rs.SetReportParameters(ReportPath, paramInfos)
paramInfos = GetParameterReports(Nothing)
Some of the report parameters depend on the 'user_id', but, unfortunately, after calling ReportingService2005.GetReportParameters() with the passed 'user_id' value, dependent parameters still don't have DefaultValues.
Could you help to understand whether I am doing something wrong while setting the report parameters values, or the reason is in how the SSRS report was created?
As part of a sort of photo album I have a datalist that displays a bunch of pictures along with some metadata. This all works nicely.
I want to include a check box that flags individual pictures for deletion. Having checked certain boxes, clicking a 'delete' button will fire off a SQL delete command.
Problem is that I have no idea how to identify which check boxes are ticked.
I'm thinking of some sort of loop routine that will identify which cb's are ticked and then read the label 'picID1' text value for inclusion in the SQL delete command.
How do I assign unique id's to the cb's and labels?
Here's the markup -
<asp:DataList ID="DataList1" runat="Server" DataSourceID="SqlDataSource1" RepeatColumns="3"
RepeatDirection="Horizontal" BorderWidth="0px" CellPadding="3">
<ItemStyle CssClass="item" />
<ItemTemplate>
<table align="left" border="0" cellpadding="0" cellspacing="0">
<tr>
<td>
</td>
<td>
<a href='viewphoto_Detailed.aspx?imgID=<%# Eval("imgID") %>'>
<asp:Image ID="picAlbum" runat="server" AlternateText="missing image" ImageUrl='<%# "ShowImage.ashx?id=" & Eval("imgID") %>' Width="300" />
</a>
</td>
<td>
</td>
</tr>
<tr>
<td>
</td>
<td nowrap="nowrap" width="100" valign="top">
<a class="photoData">
Entry# <asp:Label ID="picID1" runat="server" Text='<%#Server.HtmlEncode(Eval("imgID").ToString())%>'></asp:Label> <asp:CheckBox ID="CheckBox1" runat="server" /><br />
Filename submitted: <%#Getname(Server.HtmlEncode(Eval("imgFileNameSubmitted").ToString()))%><br />
Filename saved: <%#Getname(Server.HtmlEncode(Eval("imgFileNameSaved").ToString()))%><br />
Location: <%#Getname(Server.HtmlEncode(Eval("imgWhere").ToString()))%>
</a>
</td>
<td>
</td>
</tr>
</table>
</ItemTemplate>
</asp:DataList>
Lots of coffee this morning and a rush of blood to the head and I thought this up.
Seems to work ok...
Dim strPicIDs As String = ""
For Each item As DataListItem In DataList1.Items
If item.ItemType = ListItemType.Item OrElse item.ItemType = ListItemType.AlternatingItem Then
Dim DeleteCheckBox As CheckBox = DirectCast(item.FindControl("DeleteCheckBox"), CheckBox)
Dim picID As Label = DirectCast(item.FindControl("picID"), Label)
If DeleteCheckBox IsNot Nothing Then
If DeleteCheckBox.Checked = True Then
strPicIDs += picID.Text + ","
End If
End If
End If
Next
I have a gridview which lists Tools and Access values. To edit I have an edit imagebutton on each row. I have an OnRowBound method which assigns an OnClick attribute to each button so that I will know which record I need to edit.
The code is
Protected Sub ChangeFirstRowIcon(ByVal Sender As Object, ByVal e As GridViewRowEventArgs) Handles gv_AccessRights.RowDataBound
'This sub fires on each gridview row created...
'It first checks that the row is a data row (as opposed to Header, Footer etc.)
'If ib_Edit is true then change add an attribut to button with aid, tid and ac values attached.
If e.Row.RowType = DataControlRowType.DataRow Then
Dim ib_Edit As ImageButton = e.Row.FindControl("ib_Edit")
Dim lb_AccessID As Label = e.Row.FindControl("lb_AccessID")
Dim hd_ToolID As HiddenField = e.Row.FindControl("hd_ToolID")
Dim hd_AccessCode As HiddenField = e.Row.FindControl("hd_AccessCode")
If ib_Edit IsNot Nothing Then
ib_Edit.Attributes.Add("onClick", "proxyClick('" & lb_AccessID.Text & "', '" & hd_ToolID.Value & "', '" & hd_AccessCode.Value & "')")
End If
End If
End Sub
I'm using a hidden proxy button to show a modal popup which the user will use to edit a record... (the same popup will be used to add a new access record... but that will come later). So having passed my details to proxyClick I set values to controls within the modal popup. The javascript is....
<script type="text/javascript">
function proxyClick(aid, tid, ac) {
document.getElementById('hd_AccessID').value = aid;
document.getElementById('hd_ToolIDMod').value = tid;
document.getElementById('hd_AccessCodeMod').value = ac;
document.getElementById('but_SetModalDetails').click();
}
</script>
For reference the main bits of the markup are....
<table class="border">
<tr>
<td>
<asp:Button ID="but_SetModalDetails" runat="server" Style="display: none" Text="Set modal details" ClientIDMode="Static" UseSubmitBehavior="true" />
<asp:Button ID="but_HiddenProxy" runat="server" Style="display: none" Text="Hidden Proxy Button for Modal Popup" ClientIDMode="Static" />
</td>
<td class="rt">
<asp:Button ID="but_AddTool" runat="server" AccessKey="A" CssClass="butGreen" Text="Add Tool" ToolTip="Add Tool - Alt A" />
</td>
</tr>
</table>
<asp:ModalPopupExtender ID="mpx_AddEditAccess" runat="server" CancelControlID="but_Cancel"
BehaviorID="pn_AddEditAccess" PopupControlID="pn_AddEditAccess" TargetControlID="but_HiddenProxy"
BackgroundCssClass="modalBackground" />
<asp:Panel ID="pn_AddEditAccess" runat="server" Width="500px" CssClass="modalPopup"
Style="display: block">
<div class="box">
<h2>
<asp:Label ID="lb_ModTitle" runat="server"></asp:Label>
</h2>
<asp:HiddenField ID="hd_AccessID" runat="server" ClientIDMode="Static"></asp:HiddenField>
<div class="block">
<asp:UpdatePanel ID="up_Access" runat="server" UpdateMode="Always">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="ddl_ToolName" EventName="SelectedIndexChanged" />
</Triggers>
<ContentTemplate>
<table>
<tr>
<th class="p66 rt">
Tool Name:
</th>
<td class="p66">
<asp:HiddenField ID="hd_ToolIDMod" runat="server" ClientIDMode="Static" />
<asp:DropDownList ID="ddl_ToolName" runat="server" AutoPostBack="true" AppendDataBoundItems="True"
DataSourceID="SqlDS_Tools" DataTextField="ToolName" DataValueField="ToolID" OnSelectedIndexChanged="ddl_ToolName_SIC">
<asp:ListItem Text="Please Select..." Value="0"></asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDS_Tools" runat="server" ConnectionString="<%$ ConnectionStrings:ToolsConnString %>"
SelectCommand="SELECT [ToolID], [ToolName] FROM [tbl_Tools] WHERE ([Redundant] = #Redundant)">
<SelectParameters>
<asp:Parameter DefaultValue="False" Name="Redundant" Type="Boolean" />
</SelectParameters>
</asp:SqlDataSource>
<asp:RequiredFieldValidator ID="rfv_ddl_ToolName" runat="server" ControlToValidate="ddl_ToolName"
CssClass="error" Display="Dynamic" ErrorMessage="Please Select Tool Name" InitialValue="0">
</asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<th class="p66 rt">
Access Rights:
</th>
<td class="p66">
<asp:HiddenField ID="hd_AccessCodeMod" runat="server" ClientIDMode="Static" />
<asp:DropDownList ID="ddl_AccessCode" runat="server" Enabled="false">
<asp:ListItem Text="No Access" Value="0"></asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td class="p66">
<asp:Button ID="but_Cancel" runat="server" Text="Cancel" />
</td>
<td class="p66 rt">
<asp:Button ID="but_Save" runat="server" Text="Save" />
</td>
</tr>
</table>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</div>
</asp:Panel>
As you can see I have implemented two hidden buttons but_SetModalDetails and but_HiddenProxy. but_SetModalDetails has some codebehind which sets a couple of dropdown lists (one populated from a datasource, the other is populated dynamically based on the value of the first. The codebehind is...
Protected Sub but_SetModalDetails_Click(ByVal sender As Object, ByVal e As EventArgs) Handles but_SetModalDetails.Click
If hd_AccessID.Value = "0" Then
lb_ModTitle.Text = "Assigning Access Rights to:"
ddl_ToolName.SelectedIndex = 0
ddl_AccessCode.SelectedIndex = 0
ddl_AccessCode.Enabled = False
Else
lb_ModTitle.Text = "Edit Access Rights to:"
ddl_ToolName.SelectedValue = hd_ToolIDMod.Value
ddl_ToolName.Enabled = False
SqlStr = "SELECT AccessID AS ddlValue, AccessText as ddlText FROM tbl_AccessCodes WHERE ToolID = " & hd_ToolIDMod.Value
PopulateDDLvalue(ddl_AccessCode, SqlStr)
ddl_AccessCode.SelectedValue = hd_AccessCodeMod.Value
ddl_AccessCode.Enabled = True
End If
'NOW I NEED TO SIMULATE but_HiddenProxy Click
End Sub
As you can see at the end I need to simulate a click of but_HiddenProxy so that the modalPopup is shown populated with the correct data.
Any Ideas? Thanks
After all that... I was able to do everything in codebehind...
I only needed one hidden button but_HiddenProxy.
In the gridview instead of setting an onClick attribute for each edit image button I just set a commandname of 'AccessEdit' (don't use 'Edit'). I then had a method that handled the gridview.RowCommand event. This found the various info I needed by using findControl on the selected row. These values were then used to populate the dropdowns in the popup and then use the show command to make the popup visible.
One bit that did stump me for a while was why my RowCommand was not triggering when an imagebutton was clicked. I'd forgotten that I had validation in the modal which stopped the RowCommand being executed. I stuck a CausesValidation="false" in the imagebutton and all was OK.
Talk about using a hammer to crack a nut!