Reference a Label in a Repeater?

[Tom Kaminski [MVP]]

On my code behind page, how can I reference a Label control that's included
in a Repeater?

In other words, given:

<asp:Repeater id="Repeater1" runat="server">
<HeaderTemplate>
<table>
<tr>
<td><asp:Label ID="Label1"
runat="server"></asp:Label></td>

How can I reference Label1.Text in my VB code? (note that Label1 does not
get repeated as it's in the header)

 

[Martin Marinov]

if you want to use it from an event of that repeater such as ItemDataBound
you can use :
If e.Item.ItemType = ListItemType.Header Then
CType(e.Item.Controls(0).FindControl("Label1"), Label).Text = "Something"
End If
if you want to access it from other method you can use:

Repeater1.Controls(0).FindControl("Label1")

Regards
Martin

 

[Ken Cox [Microsoft MVP]]

Hi Tom,

After you bind the repeater, you should be able to get it with

lblCntrl = Repeater1.Controls(0).FindControl("Label1")

Sample code below.

Ken


Private Sub Page_Load _
(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles MyBase.Load
Dim lblCntrl As Label
Repeater1.DataSource = CreateDataSource()
Repeater1.DataMember = "StringValue"
Repeater1.DataBind()
lblCntrl = Repeater1.Controls(0).FindControl("Label1")
lblCntrl.Text = "The new text"
End Sub
Function CreateDataSource() As DataTable
Dim dt As New DataTable
Dim dr As DataRow
dt.Columns.Add(New DataColumn _
("IntegerValue", GetType(Int32)))
dt.Columns.Add(New DataColumn _
("StringValue", GetType(String)))
dt.Columns.Add(New DataColumn _
("CurrencyValue", GetType(Double)))
dt.Columns.Add(New DataColumn _
("Boolean", GetType(Boolean)))
Dim i As Integer
For i = 0 To 8
dr = dt.NewRow()
dr(0) = i
dr(1) = "Item " + i.ToString()
dr(2) = 1.23 * (i + 1)
dr(3) = (i = 4)
dt.Rows.Add(dr)
Next i
Return dt
End Function 'CreateDataSource


<form id="Form1" method="post" runat="server">
<ul>
<asp:Repeater id="Repeater1" runat="server">
<HeaderTemplate>
<table>
<tr>
<td>
<asp:Label ID="Label1" runat="server">My label</asp:Label>
</td>
</tr>
</table>
</HeaderTemplate>
<ItemTemplate>
<li>
<asp:Label id="Label3" runat="server">
<%# DataBinder.Eval(Container, "DataItem.StringValue") %>
</asp:Label>
</li>
</ItemTemplate>
</asp:Repeater>
</ul>
</form>

 

[Tom Kaminski [MVP]]

Thanks.

I must be doing something wrong as when I use this code the repeater does
not render:
Dim myCtrl As Label = Repeater1.Controls(0).FindControl("Label1")

myCtrl.Text = "XXX"

If I comment those two lines out, it renders.

 

[Tom Kaminski [MVP]]

That's it! Thanks Ken.

Hi Tom,

After you bind the repeater, you should be able to get it with

lblCntrl = Repeater1.Controls(0).FindControl("Label1")

Sample code below.

Ken


Private Sub Page_Load _
(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles MyBase.Load
Dim lblCntrl As Label
Repeater1.DataSource = CreateDataSource()
Repeater1.DataMember = "StringValue"
Repeater1.DataBind()
lblCntrl = Repeater1.Controls(0).FindControl("Label1")
lblCntrl.Text = "The new text"
End Sub
Function CreateDataSource() As DataTable
Dim dt As New DataTable
Dim dr As DataRow
dt.Columns.Add(New DataColumn _
("IntegerValue", GetType(Int32)))
dt.Columns.Add(New DataColumn _
("StringValue", GetType(String)))
dt.Columns.Add(New DataColumn _
("CurrencyValue", GetType(Double)))
dt.Columns.Add(New DataColumn _
("Boolean", GetType(Boolean)))
Dim i As Integer
For i = 0 To 8
dr = dt.NewRow()
dr(0) = i
dr(1) = "Item " + i.ToString()
dr(2) = 1.23 * (i + 1)
dr(3) = (i = 4)
dt.Rows.Add(dr)
Next i
Return dt
End Function 'CreateDataSource


<form id="Form1" method="post" runat="server">
<ul>
<asp:Repeater id="Repeater1" runat="server">
<HeaderTemplate>
<table>
<tr>
<td>
<asp:Label ID="Label1" runat="server">My label</asp:Label>
</td>
</tr>
</table>
</HeaderTemplate>
<ItemTemplate>
<li>
<asp:Label id="Label3" runat="server">
<%# DataBinder.Eval(Container, "DataItem.StringValue") %>
</asp:Label>
</li>
</ItemTemplate>
</asp:Repeater>
</ul>
</form>

 

[Tom Kaminski [MVP]]

Ken sorted it out, I need to bind the repeater first.

 

[Martin Marinov]

What was the problem Tom ? are you cast the finded control to a label
control
Dim myCtrl As Label = CType(Repeater1.Controls(0).FindControl("Label1"),
Label)


Regards,
Martin