i hope you can help with my issue. I'm trying to fill out a form from my database using a datatable. All seems to work fine but i get no data returned. Can anyone explain why? I've looked at the debug and there seems to be no errors and nothing looks like its failed. Here's my code behind (vb.net)
Imports System.Data
Imports System.Data.SqlClient
Imports System.Net.Mail
Partial Class _Default
Inherits System.Web.UI.Page
Private Sub getData(ByVal user As String)
Dim dt As New DataTable()
Dim constr As String = ConfigurationManager.ConnectionStrings("conn").ConnectionString
Dim connection As New SqlConnection(constr)
connection.Open()
Dim sqlCmd As New SqlCommand("SELECT * from tblContent WHERE CID = #ID", connection)
Dim sqlDa As New SqlDataAdapter(sqlCmd)
sqlCmd.Parameters.AddWithValue("#ID", Request.QueryString("ID"))
sqlDa.Fill(dt)
If dt.Rows.Count > 0 Then
ID.Text = dt.Rows(0)("CID").ToString
TextBox2.Text = dt.Rows(0)("Heading").ToString
TextBox1.Text = dt.Rows(0)("ContText").ToString
Label2.Text = dt.Rows(0)("Location").ToString
End If
connection.Close()
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
If Not Page.IsPostBack Then
getData(Me.User.Identity.Name)
End If
End Sub
Presentation layer:
<h2><asp:Label ID="Label2" runat="server" Text=""></asp:Label></h2>
<asp:TextBox ID="ID" runat="server" Visible="false"> </asp:TextBox><br />
<asp:Label ID="Label3" runat="server" Text="Heading" CssClass="label"></asp:Label>
<asp:TextBox ID="TextBox2" TextMode="SingleLine" Text="" runat="server"></asp:TextBox><br />
<asp:Label ID="Label1" runat="server" Text="Content" CssClass="label"></asp:Label><br />
<asp:TextBox ID="TextBox1" TextMode="MultiLine" runat="server"></asp:TextBox>
I'm passing through the ID from another page via the query string (ID=5 as an example). There is data in my database and all labels/textboxes have the right IDs etc. I just can see what's wrong?
Thanks!
You could try to pass the correct type instead of string:
Using sqlDa As New SqlDataAdapter(sqlCmd)
Dim idParam = new SqlParameter("#ID", SqlDbType.Int)
Dim id As Int32
If Not Int32.TryParse(Request.QueryString("ID"), id) Then Throw New Exception("Not a valid ID-parameter!")
idParam.Value = id
sqlDa.SelectCommand.Parameters.Add(idParam)
sqlDa.Fill(dt)
End Using
By the way, also use the Using-statement for the connection. As an aside, you don't need to open/close the connection with SqlDataAdapter.Fill(table) since that is done automatically.
Related
I have got a gridview which when you press select on a row it transfers you to another gridview page,
which displays more columns from that table to give more detail about that row.
I know how to do this using:
<asp:HyperLinkField DataNavigateUrlFields="MISAppID" DataNavigateUrlFormatString="ApplicationsDetails.aspx?MISAppID={0}" Text="Select" />
In the 1st Gridview then using a Stored-procedure on the second page it displays the correct row using the ID field.
In my current site on the second page, I have added an edit button that does edit the row correctly in my database but on completion, it breaks the site and I can't work out how to get it to just refresh the gridview
This is the error I get:
Exception Details: System.NotSupportedException: Updating is not
supported by data source 'SqlDataSource1' unless UpdateCommand is
specified.
Is it the case that my BindGrid is missing something or is the way I am using my Stored-procedure?
Here is my VB code:
Public Sub BindGrid() Handles SqlDataSource1.Selecting
End Sub
Protected Sub OnRowEditing(sender As Object, e As GridViewEditEventArgs)
GridView1.EditIndex = e.NewEditIndex
Me.BindGrid()
End Sub
Protected Sub OnRowUpdating(sender As Object, e As GridViewUpdateEventArgs)
Dim row As GridViewRow = GridView1.Rows(e.RowIndex)
Dim misappId As Integer = Convert.ToInt32(GridView1.DataKeys(e.RowIndex).Values(0))
Dim application As String = TryCast(row.Cells(2).Controls(0), TextBox).Text
Dim url As String = TryCast(row.Cells(3).Controls(0), TextBox).Text
Dim access_group As String = TryCast(row.Cells(4).Controls(0), TextBox).Text
Dim creator_ein As String = TryCast(row.Cells(5).Controls(0), TextBox).Text
Dim data_location As String = TryCast(row.Cells(6).Controls(0), TextBox).Text
Dim purpose As String = TryCast(row.Cells(7).Controls(0), TextBox).Text
Dim active As String = TryCast(row.Cells(8).Controls(0), TextBox).Text
Dim business_owner As String = TryCast(row.Cells(9).Controls(0), TextBox).Text
Dim area As String = TryCast(row.Cells(10).Controls(0), TextBox).Text
Dim constr As String = ConfigurationManager.ConnectionStrings("myLocalConnectionString").ConnectionString
Using con As New SqlConnection(constr)
Using cmd As New SqlCommand("UPDATE tbl_AutomationCompassApplications SET Application = #Application, URL = #URL, Access_Group = #Access_Group, Creator_EIN = #Creator_EIN, Data_location = #Data_location, Purpose = #Purpose, Active = #Active, Business_Owner = #Business_Owner, Area = #Area WHERE MISAppID = #MISAppID")
cmd.Parameters.AddWithValue("#MISAppID", misappId)
cmd.Parameters.AddWithValue("#Application", application)
cmd.Parameters.AddWithValue("#URL", url)
cmd.Parameters.AddWithValue("#Access_Group", access_group)
cmd.Parameters.AddWithValue("#Creator_EIN", creator_ein)
cmd.Parameters.AddWithValue("#Data_location", data_location)
cmd.Parameters.AddWithValue("#Purpose", purpose)
cmd.Parameters.AddWithValue("#Active", active)
cmd.Parameters.AddWithValue("#Business_Owner", business_owner)
cmd.Parameters.AddWithValue("#Area", area)
cmd.Connection = con
con.Open()
cmd.ExecuteNonQuery()
con.Close()
End Using
End Using
GridView1.EditIndex = -1
Me.BindGrid()
End Sub
Ok, say we have a list of hotels - we want to display them, and then click on a row to eit.
(and you writing WAY too much code here).
So, lets say we drop in a gridview. Use the connection wizard - let it generate the markup.
THEN REMOVE the data source on the page, remove the datasource property of the gridview.
So, in less time then it takes me to write above? We have this markup:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:Button ID="cmdView" runat="server" Text="Edit"
PK = '<%# Container.DataItemIndex %>' OnClick="cmdView_Click" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="FirstName" HeaderText="FirstName" />
<asp:BoundField DataField="HotelName" HeaderText="HotelName" />
<asp:BoundField DataField="City" HeaderText="City" />
</Columns>
</asp:GridView>
Note the cool trick I used to get the PK row index.
When you are looking at the grid, you can't double click on the button to wire up a event (code behind), but you CAN DO THIS!!!!
Note VERY care full in above - I typed in OnClick "=", when you HIT "=", then NOTE the inteli-sense that popped up - the create NEW event is what we need. Click on create new event - NOTHING seems to happen, but if we NOW go to code behind, we have a code stub for the button!!!
And note how I needed/wanted the PK row value - so I just shoved in and created my OWN custom attribute for that button. ("PK").
Ok, so our code to load up the grid is now this - and I included the button click code:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If IsPostBack = False Then
LoadGrid()
End If
End Sub
Sub LoadGrid()
Dim strSQL As String
strSQL = "SELECT * from tblHotels Order by HotelName"
Using cmdSQL As New SqlCommand(strSQL, New SqlConnection(My.Settings.TEST3))
cmdSQL.Connection.Open()
Dim MyTable As New DataTable
MyTable.Load(cmdSQL.ExecuteReader)
GridView1.DataSource = MyTable
GridView1.DataBind()
Session("MyTable") = MyTable
End Using
End Sub
Protected Sub cmdView_Click(sender As Object, e As EventArgs)
Dim MyBtn As Button = sender
Session("RowID") = MyBtn.Attributes.Item("PK")
Response.Redirect("~/EditHotel.aspx")
End Sub
Look how clean and simple the above is!!! I find this as easy say as MS-Access coding!!!
Ok, so the grid now looks like this:
Note the button click code.
So, our markup is this for the new page (to edit hte ONE row).
<div style="float:left;width:20%">
<div style="text-align:right">
First Name :<asp:TextBox ID="txtFirstname" runat="server" Width="150"></asp:TextBox> <br />
Last Name :<asp:TextBox ID="txtLastname" runat="server" Width="150"></asp:TextBox> <br />
Hotel Name :<asp:TextBox ID="txtHotel" runat="server" Width="150"></asp:TextBox> <br />
City :<asp:TextBox ID="txtCity" runat="server" Width="150"></asp:TextBox> <br />
Active :<asp:CheckBox ID="Active" runat="server" Width="150"></asp:CheckBox>
</div>
</div>
<div style="clear:both">
<br />
<asp:Button ID="cmdSave" runat="server" Text ="Save " />
<asp:Button ID="cmdCancel" runat="server" Text="Cancel" Style="margin-left:20px" />
</div>
</form>
and it looks like this:
and the load code and save button code for this page?
This:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If IsPostBack = False Then
LoadInfo()
End If
End Sub
Sub LoadInfo()
Dim MyTable As DataTable = Session("MyTable")
Dim MyRow As DataRow = MyTable.Rows(Session("RowID"))
txtFirstname.Text = MyRow("FirstName")
txtLastname.Text = MyRow("LastName")
txtCity.Text = MyRow("City")
txtHotel.Text = MyRow("HotelName")
Active.Checked = MyRow("Active")
End Sub
Protected Sub cmdSave_Click(sender As Object, e As EventArgs) Handles cmdSave.Click
Dim MyTable As DataTable = Session("MyTable")
Dim MyRow As DataRow = MyTable.Rows(Session("RowID"))
MyRow("FirstName") = txtFirstname.Text
MyRow("LastName") = txtLastname.Text
MyRow("City") = txtCity.Text
MyRow("HotelName") = txtHotel.Text
MyRow("Active") = Active.Checked
Using cmdSQL As New SqlCommand("SELECT * from tblHotels where ID = 0",
New SqlConnection(My.Settings.TEST3))
Dim da As New SqlDataAdapter(cmdSQL)
Dim cmdUpdate As New SqlCommandBuilder(da)
da.Update(MyTable)
End Using
Response.Redirect("~/MyTours.aspx")
End Sub
Again, look how easy, clean and readable the code is.
Study the above example - you see that you don't need all that parameters code, and you see how little code is in fact required to select a row - jump to page to edit, and then you hit save - update the data and jump back to the grid row page.
Using VS2013 (asp.net, VB) and SQL Server 2012.
I have a table in my database that consists of columns ID, Name and ProfilePic. ProfilePic has a type of image.
I want to display a list of ALL of the images in a gridview. Looking at google I can only find examples where someone is selecting an image based on an ID which is not what I want.
Here is my imageHandler.ashx:
<%# WebHandler Language="VB" Class="profilePICHandler" %>
Imports System
Imports System.Web
Imports System.Data.SqlClient
Public Class profilePICHandler : Implements IHttpHandler
Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
Dim con As New SqlConnection()
con.ConnectionString = ConfigurationManager.ConnectionStrings("nefsaConnectionString").ConnectionString
' Create SQL Command
Dim cmd As New SqlCommand()
cmd.CommandText = "select * from ProfilePics"
cmd.CommandType = System.Data.CommandType.Text
cmd.Connection = con
con.Open()
Dim dReader As SqlDataReader = cmd.ExecuteReader()
dReader.Read()
context.Response.BinaryWrite(DirectCast(dReader("profilepic"), Byte()))
dReader.Close()
con.Close()
End Sub
Public ReadOnly Property IsReusable() As Boolean Implements IHttpHandler.IsReusable
Get
Return False
End Get
End Property
End Class
On my aspx page I have this
<asp:GridView ID="gridSelectAPic" runat="server"
AutoGenerateColumns="false">
<Columns>
<asp:TemplateField HeaderText="Image">
<ItemTemplate>
<asp:Image runat="server"
ImageUrl='<%# "ProfilePICHandler.ashx"%>'
ID="profilePIC" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
And on the code behind I have this
Dim dt As New DataTable
Dim conn As New SqlConnection(ConnectionString)
Using conn
Dim ad As New SqlDataAdapter("Select * from ProfilePics", conn)
ad.Fill(dt)
End Using
gridSelectAPic.DataSource = dt
gridSelectAPic.DataBind()
I am at a bit of a loss how to proceed so any help greatly appreciated
Its because your handler is implemented wrong. You will need a querystring to tell the handler which image you have to retrieve.
You can use asp:ImageField for brevity and readability. Markup
<asp:ImageField HeaderText="Image"
DataImageUrlField="EmployeeID"
DataImageUrlFormatString="ProfilePICHandler.ashx?id={0}" />
<asp:TemplateField HeaderText="Image">
<ItemTemplate>
<asp:Image runat="server"
ImageUrl='<%# Eval("EmployeeID", "ProfilePICHandler.ashx?id={0}")%>'
ID="profilePIC" />
</ItemTemplate>
</asp:TemplateField>
Now fetch from querystring from the generic handler like this
Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
Dim con As New SqlConnection()
con.ConnectionString = ConfigurationManager.ConnectionStrings("nefsaConnectionString").ConnectionString
Dim cmd As New SqlCommand()
cmd.CommandText = String.Format("select profilepic from ProfilePics where EmployeeID=", context.Request.QueryString("id"))
cmd.CommandType = System.Data.CommandType.Text
cmd.Connection = con
con.Open()
Dim dReader As SqlDataReader = cmd.ExecuteReader()
dReader.Read()
context.Response.BinaryWrite(DirectCast(dReader("profilepic"), Byte()))
dReader.Close()
con.Close()
End Sub
Please note that
I have given the name EmployeeID for your PK in DB
Your handler name is Pascalcased on Eval and CamelCased at its implementation. Is it a typo?
Haven't parameterized the query for brevity.
I have a comments box which has a template field which looks something like this..
<asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" DataSourceID="CommentsDataSource" Height="167px" Width="325px">
<Columns>
<asp:TemplateField HeaderText="Comments">
<ItemTemplate>
<div style="background-color:Silver">
<div class="avatar-frame">
<asp:Image ID="ProfilePic" runat="server"/>
</div>
<h1><%# Eval("TagLine")%></h1>
<h2><%# Eval("IfNonMemberUserName")%></h2>
<p><%# Eval("CommentBody")%></p>
</div>
</ItemTemplate>
<AlternatingItemTemplate>
<div style="background-color:White">
<div class="avatar-frame">
</div>
<h1><%# Eval("TagLine")%></h1>
<h2><%# Eval("IfNonMemberUserName")%></h2>
<p><%# Eval("CommentBody")%></p>
</div>
</AlternatingItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="CommentsDataSource" runat="server" ConnectionString="<%$ ConnectionStrings:BookMeetConnString %>" ProviderName="<%$ ConnectionStrings:BookMeetConnString.ProviderName %>" SelectCommand="SELECT [IfNonMemberUserName], [UserAvatar], [TagLine], [CommentBody] FROM [comments] WHERE ([BookID] = ?)">
<SelectParameters>
<asp:QueryStringParameter Name="?" QueryStringField="ID" />
</SelectParameters>
</asp:SqlDataSource>
Some background:
I have an MS Access database with a table called 'userprofiles' which has a field called AvatarURL. Similiarly there is also a table called 'comments' which has lookupfield called 'UserAvatar' inside of it referring to the 'userprofiles' table's 'AvatarURL' field.
I am receiving the "'ProfilePic' is not declared. It may not be accessible due to it's permission level" error in my code behind. Intellisense is telling me that the image that has the ID 'ProfilePic' is not declared (within the DisplayData sub routine.
The problematic bit of code is:
Protected Sub DisplayData()
Dim conn As OleDbConnection = New OleDbConnection(ConfigurationManager.ConnectionStrings("BookMeetConnString").ConnectionString)
Dim sql = "SELECT * FROM userprofiles WHERE TravellerName=#f1"
Dim cmd = New OleDbCommand(sql, conn)
cmd.Parameters.AddWithValue("#f1", User.Identity.Name)
conn.Open()
Dim profileDr = cmd.ExecuteReader()
profileDr.Read()
If Not IsDBNull(profileDr("AvatarURL")) Then ProfilePic.ImageUrl = profileDr.Item("AvatarURL")
conn.Close()
End Sub
At runtime, detail.aspx works fine, but the avatars in the comment box don't show up at all. What am I doing wrong?
EDIT:
I have managed to get this far:
Protected Sub GridView2_RowDataBound(sender As Object, e As GridViewRowEventArgs)
Dim conn As OleDbConnection = New OleDbConnection(ConfigurationManager.ConnectionStrings("BookMeetConnString").ConnectionString)
Dim sql = "SELECT * FROM userprofiles WHERE TravellerName=#f1"
Dim cmd = New OleDbCommand(sql, conn)
cmd.Parameters.AddWithValue("#f1", User.Identity.Name)
conn.Open()
Dim profileDr = cmd.ExecuteReader()
profileDr.Read()
Dim ProfilePic
If e.Row.RowType = DataControlRowType.DataRow Then
ProfilePic = e.Row.FindControl("ProfilePic")
If Not IsDBNull(profileDr("AvatarURL")) Then ProfilePic.ImageUrl = profileDr.Item("AvatarURL")
End If
conn.Close()
End Sub
However, the images still do not appear at runtime. What is wrong with this? Should I be using the datareader?
The only way to refer to get at ProfilePic is to set it at DataBind time. You'll need to wire up the GridView2_RowDataBound event by adding OnRowDataBound="GridView2_RowDataBound" to your asp:GridView tag.
You'll then get the RowDataBound event for each row (even header and footer rows, so you need to test for what type of row is currently firing the event. You can then use FindControl on the current row item to look for the current row's ProfilePic. You'll have to cast the output of that function into an Image.
protected void GridView2_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
Image ProfilePic = (Image)e.Row.FindControl("ProfilePic");
ProfilePic.ImageUrl = "stuff";
}
}
As a control within a template, you can only access the control when binding, in particular in the OnRowDataBound event handler (for a GridView).
In this event handler you need to call FindControl with the ID of the wanted control and cast it to the right type (only if you need to access specific members of that type).
Try this
public string DisplayData()
Dim conn As OleDbConnection = New OleDbConnection(ConfigurationManager.ConnectionStrings("BookMeetConnString").ConnectionString)
Dim sql = "SELECT * FROM userprofiles WHERE TravellerName=#f1"
Dim cmd = New OleDbCommand(sql, conn)
cmd.Parameters.AddWithValue("#f1", User.Identity.Name)
conn.Open()
Dim profileDr = cmd.ExecuteReader()
profileDr.Read()
string imagename= profileDr("AvatarURL")
conn.Close()
return imagename
End Sub
and client side change for
<asp:Image ID="ProfilePic" **ImageUrl='<%# DisplayData()%>'** runat="server" />
Half the battle of getting an answer is knowing how to ask the question. I am not certain I am doing a good job of that but this is my best shot.
I'm trying to bind a ddl with data inside a gridview that is NOT coming from the gridview itself. This is within the EditItemTemplate. The purpose for doing so is to give the user, to start, a selected value and a series of other values from a lookup stored procedure.
I'll mention here that I have done this successfully before but using an ObjectDataSource. I am trying to avoid that this time and do it entirely from the code behind for now then move it to a data layer later.
Here is what I have so far...
<asp:GridView ID="usersGrid" runat="server"
DataKeyNames="userID"
AutoGenerateColumns="false" Width="580"
OnRowUpdating="usersGrid_RowUpdating"
OnRowEditing="usersGrid_RowEditing"
OnRowCancelingEdit="usersGrid_RowCancelingEdit" OnRowDeleting="usersGrid_RowDeleting"
>
...
<EditItemTemplate>
<div class="gridName">
<asp:TextBox ID="txtFirstName" Text='<%#Eval("firstName") %>' runat="server" Width="95" />
</div>
<div class="gridName">
<asp:TextBox ID="txtLastName" Text='<%#Eval("lastName") %>' runat="server" Width="95" />
</div>
<div class="gridEmail">
<asp:TextBox ID="txtEmail" Text='<%#Eval("email") %>' runat="server" Width="245" />
</div>
<div class="gridName">
<asp:DropDownList ID="ddl_GetLists"
DataSourceID="GetListData()"
AppendDataBoundItems="true"
DataValueField="listID"
DataTextField="listName"
SelectedValue='<%#Bind("listID") %>'
runat="server"
>
</asp:DropDownList>
</div>
</EditItemTemplate>
....
Protected Sub usersGrid_RowEditing(ByVal sender As Object, ByVal e As GridViewEditEventArgs)
usersGrid.EditIndex = e.NewEditIndex
BindData()
End Sub
....
Private Sub BindData()
Dim conn As New SqlConnection(connectionString)
Dim ad As New SqlDataAdapter("MAINT_DIST_GET_USERS", conn)
Dim ds As New DataSet()
ad.Fill(ds)
GetListData()
usersGrid.DataSource = ds
usersGrid.DataBind()
End Sub
I'm including last two as well as other approaches I've tried and failed.
...
Protected Sub usersGrid_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
If e.Row.RowState = DataControlRowState.Edit Then
Dim ddl As DropDownList = DirectCast(e.Row.FindControl("ddl_GetLists"), DropDownList)
Dim conn As New SqlConnection(connectionString)
Dim ad As New SqlDataAdapter("MAINT_DIST_GET_LISTS", conn)
Dim ds As New DataSet()
ad.Fill(ds)
ddl.DataSource = ds
ddl.DataBind()
End If
End Sub
Public Function BindDropdown() As DataSet
Dim conn As New SqlConnection(connectionString)
Dim ad As New SqlDataAdapter("MAINT_DIST_GET_LISTS", conn)
Dim ds As New DataSet()
ad.Fill(ds)
ddl_GetLists.DataSource = ds
ddl_GetLists.DataBind()
End Function
I'll also ask why, in the final function, why is the control, ddl_GetLists, not recognized as well? Inside the grid it disappears from the designer but outside of the grid it reappears.
Thank you all for your help.
You have a couple of options. You can use a datasource control, or you can bind the dropdowns in code-behind in the RowDataBound event of the GridView.
I noticed a couple of issues in your code too. In your example you're assigning the DataSourceID incorrectly. The DataSourceID should point to the ID of a datasource control on the page:
<asp:DropDownList ID="ddl_GetLists"
DataSourceID="SqlDataSource1"
AppendDataBoundItems="true"
DataValueField="listID"
DataTextField="listName"
SelectedValue='<%#Bind("listID") %>'
runat="server">
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT listID, listName FROM SomeTable">
</asp:SqlDataSource>
If you want to do the binding in code-behind, you can do this through the RowDataBound event:
Protected Sub GridView1_RowDataBound(sender As Object, e As GridViewRowEventArgs)
If e.Row.RowType = DataControlRowType.DataRow AndAlso (e.Row.RowState And DataControlRowState.Edit) = DataControlRowState.Edit Then
Dim ddl As DropDownList = TryCast(e.Row.FindControl("ddl_GetLists"), DropDownList)
If ddl IsNot Nothing Then
ddl.DataSource = RetrieveDataSource()
ddl.DataBind()
End If
End If
End Sub
You can simply create a global list of type that you want and set it as null
if you are using linq then just put that source in the DropDownListObject.DataSource
DropDownListObject.DataSource=ObjListSource;
DropDownListObject.DataBind;
Hope it will be helpful.
I see a couple issues.
Protected Sub usersGrid_RowEditing(ByVal sender As Object, ByVal e As GridViewEditEventArgs)
usersGrid.EditIndex = e.NewEditIndex
BindData()
End Sub
Why are you doing this? Why would you bind the grid again on an event on your grid thats already been filled?
You fix this:
In the code page, you define a GetListData() public function (i think you did).
Use DataSource property (if you want to call a function) :
<asp:DropDownList ID="ddl_GetLists"
DataSource='<%# GetListData() %>'
AppendDataBoundItems="true"
DataValueField="listID"
DataTextField="listName"
SelectedValue='<%#Bind("listID") %>'
runat="server" >
</asp:DropDownList>
Losing my mind with this one. My button gets a commandargument of empty string even though the commandargument gets set. I have verified it gets set to the correct ID in debug mode, but then when I go to access this commandargument later in the repeaters ItemCommand event the commandarguments are empty string. And I have no idea why. I end up getting a sq foreign key exception because it is inserting an ID of 0 from the empty string values. There is no other code regarding the repeaters buttons that would be resetting it.
Repeater:
<asp:Repeater ID="repeaterAddresses" ViewStateMode="Enabled" DataSourceID="sqlFacilityAddresses" runat="server">
<ItemTemplate>
<Select:Address ID="AddressControl" runat="server" />
<asp:Button ID="btnMarkAsBilling" runat="server" EnableViewState="true" CommandName="Billing" Text="Mark as billing address" />
<asp:button ID="btnMarkAsPhysical" runat="server" EnableViewState="true" CommandName="Physical" Text="Mark as physical address" />
</ItemTemplate>
</asp:Repeater>
Code behind:
Protected Sub repeaterAddresses_ItemCreated(ByVal sender As Object, ByVal e As RepeaterItemEventArgs) Handles repeaterAddresses.ItemCreated
If Not IsNothing(DirectCast(e.Item.DataItem, DataRowView)) Then
If (e.Item.ItemType = ListItemType.Item) Or (e.Item.ItemType = ListItemType.AlternatingItem) Then
Dim addressControl As Address = DirectCast(e.Item.FindControl("AddressControl"), Address)
addressControl.AddressID = CInt(DirectCast(e.Item.DataItem, DataRowView)("Address_ID").ToString())
Dim btnBilling As Button = DirectCast(e.Item.FindControl("btnMarkAsBilling"), Button)
btnBilling.CommandArgument = CInt(DirectCast(e.Item.DataItem, DataRowView)("Address_ID").ToString())
Dim btnPhysical As Button = DirectCast(e.Item.FindControl("btnMarkAsPhysical"), Button)
btnPhysical.CommandArgument = CInt(DirectCast(e.Item.DataItem, DataRowView)("Address_ID").ToString())
End If
End If
End Sub
Protected Sub repeaterAddress_ItemCommand(ByVal sender As Object, ByVal e As RepeaterCommandEventArgs) Handles repeaterAddresses.ItemCommand
Dim conn As New SqlConnection(ConfigurationManager.ConnectionStrings("Trustaff_ESig2").ConnectionString)
Dim button As Button = CType(e.CommandSource, Button)
Select Case e.CommandName
Case "Billing"
Dim cmdBillingAddress As New SqlCommand("[SP_Facility_UpdateBillingAddress]", conn)
With cmdBillingAddress
.CommandType = CommandType.StoredProcedure
.Parameters.Add(New SqlParameter("#Facility_ID", DbType.Int32)).Value = sqlFacilityAddresses.SelectParameters("Facility_ID").DefaultValue
.Parameters.Add(New SqlParameter("#BillingAddress_ID", DbType.Int32)).Value = e.CommandArgument
End With
conn.Open()
cmdBillingAddress.ExecuteNonQuery()
conn.Close()
Case "Physical"
Dim cmdPhysicalAddress As New SqlCommand("[SP_Facility_UpdatePhysicalAddress]", conn)
With cmdPhysicalAddress
.CommandType = CommandType.StoredProcedure
.Parameters.Add(New SqlParameter("#Facility_ID", DbType.Int32)).Value = sqlFacilityAddresses.SelectParameters("Facility_ID").DefaultValue
.Parameters.Add(New SqlParameter("#PhysicalAddress_ID", DbType.Int32)).Value = e.CommandArgument
End With
conn.Open()
cmdPhysicalAddress.ExecuteNonQuery()
conn.Close()
End Select
PopulateBillingPhysicalAddresses(sqlFacilityAddresses.SelectParameters("Facility_ID").DefaultValue)
End Sub
Try this:
<asp:Button ID="btnMarkAsBilling" runat="server" EnableViewState="true"
CommandName="Billing" Text="Mark as billing address"
CommandArgument='<%# Eval("Address_ID") %>'/>
Note the single quotes around the attribute value. ASP.NET will not execute the server side data binding code if they are double quotes. You'll need to remove the CommandArgument assignments from your code behind.
Address_ID will need to be a property on the object you are databinding to the repeater.