I have a ListView called "orderReceiptTable" which I am able to properly access from the Code Behind. Within it is a literal called "orgName" which I obviously would like to populate with an organization's name.
After much searching it was determined that FindControl was the right course of action. Perhaps I am using FindControl improperly but I am unable to actually have it "find" my Literal control.
The code block is being called in the Page Load.
My code looks as such:
Dim orgNameString As String = getOrganizationName.getOrgName(organizationID).ToString()
Dim myOrgName As Literal = FindControl("orgName")
myOrgName = CType(orderReceiptTable.FindControl("orgName"), Literal)
If Not (myOrgName Is Nothing) Then
Response.Write("I found the control!")
myOrgName.Text = orgNameString
End If
Here is the mark-up in the .aspx file:
<asp:ListView ID="orderReceiptTable" runat="server">
<LayoutTemplate>
<div runat="server" id="itemPlaceholder" />
</LayoutTemplate>
<EmptyDataTemplate>
<tr id="noDataDiv" runat="server">
<td class="sub" ID="itemPlaceholder" runat="server">
No order data was returned.
</td>
</tr>
</EmptyDataTemplate>
<ItemTemplate>
<div id="itemPlaceholder" runat="server" style="border:solid 1px #000000; width:250px; float:left; padding:10px; border:solid 2px #1664B1;">
<div>Organization Name: <asp:Literal runat="server" ID="orgName"></asp:Literal></div>
</div>
</ItemTemplate>
</asp:ListView>
The controls inside the template will only be created after binding some data to it. You will then be able to access it via the ListView.Controls property.
This previous answer might help: Find control in ListView EmptyDataTemplate
Related
I have the below code on my aspx page, where a listview is being formed on HTML
´´´
<asp:ListView runat="server"
ID="VistaVehiculos"
DataSourceID="ADSParticipantes"
DataKeyNames="IDInscrito" ItemPlaceholderID="itemPlaceHolder"
OnItemDataBound="VistaVehiculos_ItemDataBound">
<ItemTemplate>
<td>
<asp:Label ID="lNum" runat="server" Height="80px" Width="83px" BackColor="Red"
Style="text-align:center; margin-left:5px; font-size:40px; padding-top:3px; font-family:'Doppio One', sans-serif; font-style:italic"
Text='<%# Eval("Num")%>'/>
<asp:Label ID="lTS" runat="server" Height="80px" BorderStyle="None"
Style="font-size:11px; display:block; margin-top:-80px; margin-left:8px"
text='<%# If(Eval("SEO1") Is DBNull.Value, "", "Correct"))%>'/>
</td>
</ItemTemplate>
<GroupTemplate>
<tr>
<asp:PlaceHolder runat="server" ID="itemPlaceholder" />
</tr>
</GroupTemplate>
<GroupSeparatorTemplate>
<tr id="Tr1" runat="server">
<td style="height:15px"></td>
</tr>
</GroupSeparatorTemplate>
<LayoutTemplate>
<table border="0">
<asp:PlaceHolder runat="server" ID="groupPlaceHolder" />
</table>
</LayoutTemplate>
</asp:ListView>
´´´
In label id=lTS, I evaluate a data field "SEO1"
What I need to do is to set such data field with different values depending on different requirements, to use this page as a template, using load vba procedure.
This case refers to Safety Engine O1 - SEO1, if I need to change by Safety Engine O2, I would evaluate SEO2 data field.
I cannot find control to change text value.
Any help on this?
Ok, first up. Your tags VBA are incorrect VBA is Visual Basic for Applications (that the code system used in Word, Excel, and ms-access.
you are using vb.net - you should change your tags.
As for messing around with that expression? You don't mention if the if() now works?
However, beyond ANY simple Eval() expression, I find it becomes worse then a trip to the dentist to try and burn up a pot of coffee to inject/use/have complex expressions. They are also rather painfull to extend and write and change.
So, I suggest you consider setting the value(s), and writing your code logic in codebehind.
so, I would change this control to this:
<asp:Label ID="lTS" runat="server" Height="80px" BorderStyle="None"
Style="font-size:11px; display:block; margin-top:-80px; margin-left:8px"
text = "" />
Note how it has nothing now. Because we want to apply "more" complex logic to that control, then moving our code to the item data bound event is the place to be!
So, we now will have this:
Protected Sub VistaVehiculos_ItemDataBound(sender As Object, e As ListViewItemEventArgs) Handles VistaVehiculos.ItemDataBound
If e.Item.ItemType = ListViewItemType.DataItem Then
' get the control we are to format
Dim SEOlbl As Label = e.Item.FindControl("ITS")
Dim dRow As DataRowView = e.Item.DataItem
' NOTE IN ABOVE - NOT list view item!!! - but DataRowItem!!!!!!!!!
Dim strResult As String = ""
If dRow("SafteyCase") = "Safety Engine O1" Then
strResult = dRow("SE1").ToString
Else
strResult = dRow("SE2").ToString
End If
If strResult = "" Then
strResult = "NO VALUE"
End If
SEOlbl.Text = strResult
End If
End Sub
note how we are free to get any data column here INCLUDING ones not in the lv layout, but of course they MUST be in the data source.
So, you can conditional test anything you want, and then SHOVE into the label the results of that code - that code can be anything you want.
so, remove your expression from the label, and use code in the data bound event of lv.
Needless to say, you can also use this event to set color of the row, or even text boxes, so for conditonal formatting tricks, you can use the above.
We have a new requirement to show the signature image in result grid for each record. Currently we store the signature image as base64 format in our database .we are able to convert base 64 to memory stream.
We want to understand does any of your image control support to bind image from memory stream instead of Url .
You could keep images as base64 string form, and use data url.
The following is a example.
<asp:Image runat="server" ID="myImage" />
The code behind is
this.myImage.ImageUrl = "data:image/png;base64,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";
The premise is that you need to know all the MIME type of images.
Reference: data URIs
Sure, you can do it this way.
A gridview, listview, repeater control - they can all do this.
So markup for a grid view:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:BoundField DataField="Animal" HeaderText="Animal" ItemStyle-Width="200px"/>
<asp:TemplateField HeaderText="Picture">
<ItemTemplate>
<asp:Image ID="Image1" runat="server"
Height="128px" Width="128px"
src='<%# "Data:Image/png;base64," + Eval("Image") %>'
/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
And the code to load up the gridview would be:
protected void Page_Load(object sender, System.EventArgs e)
{
if (System.Web.UI.Page.IsPostBack == false)
LoadGrid();
}
public void LoadGrid()
{
using (SqlCommand cmdSQL = new SqlCommand("SELECT Animal, Image from tblAnimals",
new SqlConnection(My.Settings.TEST4)))
{
cmdSQL.Connection.Open();
GridView1.DataSource = cmdSQL.ExecuteReader;
GridView1.DataBind();
}
}
Results:
Now I used a direct eval expression - but you could also use the ItemDataBound event of the gridview (or list view).
Also, I did hard code the "mine" type in above (assumed .png). You often might want to consider to save the file/mine type as a extra column in the database. But, if the picture types are to be all the same types - then a hard code right in the expression as per above will work fine.
If you have a lot of columns for this grid, then I tend to switch over to listview, since each column does NOT need a template, and I find for quick and dirty - grid view is ok, but listview is better for tweaking and lots of customizing. The trick is to get Visual Studio to generate the template + markup, and then blow out all templates except for item template. When you do this, then the crazy truckload of markup is reduced down to "easy" levels. And you can then with greater ease drop in controls - and you don't have template them.
So, the same listview for above would be this:
<asp:ListView ID="ListView1" runat="server">
<ItemTemplate>
<tr style="">
<td><asp:Label ID="AnimalLabel" runat="server" Text='<%# Eval("Animal") %>' /></td>
<td>
<asp:Image ID="ImageT1" runat="server"
Height="128px" Width="128px"
src='<%# "Data:Image/png;base64," + Eval("Image") %>'
/>
</td>
</tr>
</ItemTemplate>
<LayoutTemplate>
<table id="itemPlaceholderContainer" runat="server" border="0" style="">
<tr runat="server" style="">
<th runat="server" width="200">Animal</th>
<th runat="server">Image</th>
</tr>
<tr id="itemPlaceholder" runat="server">
</tr>
</table>
</LayoutTemplate>
</asp:ListView>
So there is somewhat "more" markup, but you can with much greater ease drop in asp.net controls - and you don't have add a templatefield - (about 4 extra lines of markup for every column - so in the long run, I like the listview.
it looks quite much the same, like this:
And the behind code would be 100% the same as above.
I have a page with FormView and a plain html table inside. The table serves for layout and contains child controls data-bind to SqlDataSource. My problem is that if I add runat=server attribute to the table declaration, all controls inside the table set my SQL parameters at NULL in DataSource_Updating event and thus the record gets updated with NULLs instead of actual values. If I don't add runat=server, everything works fine. Sample of my code:
<asp:FormView ID="SettingsFormView" runat="server" DataKeyNames="Id" DataSourceID="SettingsDataSource"
DefaultMode="Edit" Width="560px">
<EditItemTemplate>
<strong>Settings</strong>
<table runat="server" width="350px">
<tr>
<td width="160">
Time (sec)
<dx:ASPxSpinEdit ID="textTime" runat="server"
Height="21px" Number="0" Value='<%# Bind("Time") %>' Width="104px" />
<br />
</td>
<td>
</td>
</tr>
</table>
</EditItemTemplate>
</asp:FormView>
I want to be able to remove (set invisible) some rows in code behind, that's why I need to set runat=server. However I can't get anywhere with this because SQL record updates with NULLs. Please, advice what might be wrong in my code.
Try using this.
<!-- toggle through OnLoad (can use ID as well) -->
<asp:PlaceHolder runat="server" OnLoad="MakeVisibleOrNot">
<tr>
...
</tr>
</asp:PlaceHolder>
and in the code behind:
protected void MakeVisibleOrNot(object sender, EventArgs e)
{
((Control) sender).Visible = ConfigUtil.DisplaySummaryComment;
}
I am new to .NET, so I'm struggling with this. I have a content page, with a repeater control. I have a Dictionary, which is a Dictionary<string, Dictionary<int,[object]>>. I want the value of the controls inside the repeater control to get it from the object attributes - Candidate Name, would be object.CandName, candidate phone would be object.Phone etc.
I am not sure how to use Eval for this type of Dictionary. Most of the examples point to Eval("Value"), but it is not giving the correct value for me. Kindly help!
<asp:Content ID="Content2" ContentPlaceHolderID="content" Runat="Server">
<div id="rcontent">
<table>
<tr>
<td>
<asp:Label ID="lblerror" runat="server" Text="" Visible="true" CssClass="alert"></asp:Label>
</td>
</tr>
</table>
<div id ="rptdiv">
<asp:Repeater ID="Repeater1" runat="server" EnableViewState="false">
<ItemTemplate>
<div id="Div3">
<table class="GridViewStyleNoBorder" width=750px cellspacing="0" border="0" >
<tr>
<td class="PagerStyle" colspan="4">
<asp:Label ID="lblName" Runat="server"
Text='<%= Need the value of the [object].objectproperty from dictionary here %>' />
</td>
</tr>
</table>
</div>
This is my Page_Load code behind - BLDecision is my business layer code, which returns the dictionary and dictionary values are correct. I checked them in debug mode.
Code Behind:
Dictionary(int, Dictionary(int, InterviewFeedback)) ;
CandIntDetails = new Dictionary(int, Dictionary(int, InterviewFeedback))();
BLDecision objBLDecision = new BLDecision();
int ReqCategoryID = 0;
if (Request.QueryString["ReqCategoryID"] != null)
ReqCategoryID = int.Parse(Request.QueryString["ReqCategoryID"].ToString());
CandIntDetails = objBLDecision.GetCandidatesforReqCategory(ReqCategoryID);
Repeater1.DataSource = CandIntDetails;
Repeater1.DataBind();
Should I use from codebehind, can I not do Eval('<% ....%>') in the aspx page?
Thanks in advance for your help.
You cannot do it with only one repeater. Since you have a container inside a container, you need a Repeater inside a repeater:
<asp:Repeater ID="Repeater1" runat="server" EnableViewState="false">
<ItemTemplate>
<div id="Div3">
<table class="GridViewStyleNoBorder" width=750px cellspacing="0" border="0" >
<asp:Repeater ID="Repeater2" runat="server" DataSource='<%# Eval("Value")' >
<ItemTemplate>
<tr>
<td class="PagerStyle" colspan="4">
<asp:Label ID="lblName" Runat="server"
Text='<%# Eval("Name") %>' />
</td>
</tr>
</ItemTemplate>
</asp:Repeater>
</table>
</div>
</ItemTemplate>
</asp:Repeater>
If CandIntDetails is a Dictionary<int, Dictionary<int, InterviewFeedback>>, you need to extract from that the specific collection you want to use as the data source of your repeater. The reason why is because you want to render a collection of InterviewFeedback objects, which CandIntDetails is not. CandIntDetails probably looks something like this:
{
46: {
0: [InterviewFeedback],
1: [InterviewFeedback],
2: [InterviewFeedback]
}
}
It's not clear from your post what the keys are for the inner or outer dictionaries, so this is speculative. If the outer key is the the category ID (not sure why GetCandidatesforReqCategory would return something like that), and if you don't care about the inner dictionary keys, you can extract your data source like this:
Repeater1.DataSource = CandIntDetails[ReqCategoryID].Values;
That will make your data source a straight collection of InterviewFeedback objects. Once that's your data source, you can Eval to access the properties of the InterviewFeedback objects.
I have an UpdatePanel that contains a Repeater. in the ItemTemplate of the repeater there is a button and a label.
When the button gets pressed, it performs some functionality, and then sets the label to visible and disables the button.
However none of the UI changes are being made to the webpage.
Here is the code, which when stepping through in debugger appears to work fine:
protected void CommentRepeater_ItemCommand(object source, RepeaterCommandEventArgs e)
{
if (e.CommandName == "report")
{
(e.Item.FindControl("btnReportComment") as ImageButton).Enabled = false;
Label thanksLabel = (Label)e.Item.FindControl("lblReportedComment");
thanksLabel.Visible = true;
}
pnlCommentsUpdater.Update();
}
and the page's code (excluding code outside of the repeater)
<asp:UpdatePanel UpdateMode="Conditional" ID="pnlCommentsUpdater" runat="server">
<ContentTemplate>
<asp:LinkButton ID="lnkPhoto1Comments" runat="server" Text="0 Comments" OnClick="lnkPhoto1Comments_Click" CssClass="dark-gray regular bold"></asp:LinkButton>
<asp:Panel ID="pnlPhoto1Comments" runat="server" Visible="False">
<asp:Repeater ID="Repeater1" runat="server" OnItemCommand="CommentRepeater_ItemCommand">
<ItemTemplate>
<br />
<hr width="100%" size="1" color="#CCCCCC" />
<table width="534" cellpadding="0" cellspacing="0" border="0">
<tr>
<td width="150" align="left" valign="top">
<span class="blue small bold"><%# Eval("PostedBy") %>,</span><br />
<span class="light-gray small bold"><%# Eval("DateCreated", "{0:g}") %></span>
</td>
<td width="20"></td>
<td width="252" align="left" valign="top">
<div STYLE="word-wrap:break-word;width:252px;left:0">
<span class="dark-gray small bold"><%# Eval("CommentText") %></span>
</div>
</td>
<td width="20"></td>
<td width="92" valign="bottom">
<asp:ImageButton ID="btnReportComment" runat="server" ImageUrl="../images/inappropriate_off.png" CssClass="domclickroll images/inappropriate_on.png images/inappropriate_on.png" AlternateText="Inappropriate" CommandName="report" CommandArgument='<%#Eval("CommentId") %>' /><br />
<asp:Label ID="lblReportedComment" runat="server" Visible="false" CssClass="Regular bold blue" Text="Thanks. We'll check it out!"></asp:Label>
</td>
</tr>
</table>
</ItemTemplate>
</asp:Repeater>
As I said, the debugger shows it to be working fine, however it simply doesn ot show the label in the browser after clicking the button.
Anyone know what I'm doing wrong?
The error is: "Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled."
And I am calling
ScriptManager.GetCurrent(Page).RegisterPostBackControl(Repeater1);
in the page load, which I read in some sites is the solution, but it did not help.
Check out this blog post...
http://weblogs.asp.net/leftslipper/archive/2007/02/26/sys-webforms-pagerequestmanagerparsererrorexception-what-it-is-and-how-to-avoid-it.aspx
It contains a number of approaches to fixing this. With respect to your call...
ScriptManager.GetCurrent(Page).RegisterPostBackControl(Repeater1);
... I think you're supposed to pass the button to RegisterPostBackControl, and not the repeater. i.e pass it btnReportComment instead. From the reference above...
3.Call ScriptManager.RegisterPostBackControl()
and pass in the button in question.
This is the best solution for controls
that are added dynamically, such as
those inside a repeating template.
First step is to narrow down your problem. If you take out the UpdatePanel altogether, does it work OK?
Also, right off the bat I see that pnlPhoto1Comments.Visible is set to false... ? This is getting set correctly somewhere I suppose, otherwise you wouldn't even get the ItemCommand event. So probably not a problem.