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Changing the properties of a control within an emptydatatempla te

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I am using the emptydatatempla te for a gridview control. I have a detailsview control within the emptydatatempla te. In the detailsview I have a templatefield that contains an imagebutton control and a textbox control.

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  1.             <EmptyDataTemplate>
  2.                 &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;
  3.                 <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
  4.                 <asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False" DataKeyNames="ActivityTypeControl_ID"
  5.                     DataSourceID="spListActivityTypeControlByType" DefaultMode="Insert" Height="50px"
  6.                     Width="125px" BackColor="#090AAAA" OnPageIndexChanging="DetailsView1_PageIndexChanging1" BorderStyle="None" GridLines="None" OnItemCommand="DetailsView1_ItemCommand">
  7.                     <Fields>
  8.                        <asp:TemplateField HeaderText="Begin Date" SortExpression="BeginDate">
  9.                             <InsertItemTemplate>
  10.                                 &nbsp;<asp:TextBox ID="txtIBeginDate" runat="server" Text='<%# Bind("BeginDate") %>' Width="90px"></asp:TextBox>
  11.                                 <asp:ImageButton ID="imgbutICalendar1" runat="server" ImageUrl="~/Images/APPTL.ICO" Height="16px" 
  12.                                 Width="16px" OnClick="imgbutCalendar_Click" />
  13.                             </InsertItemTemplate>
  14.                         </asp:TemplateField>
  15.                  </asp:DetailsView>
  16.             </EmptyDataTemplate>
When the user clicks on the imagebutton I look at the text in the textbox and display a calendar control.

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  1.     Private ParentControl As Control
  2.     Protected Sub imgbutCalendar_Click(ByVal sender As System.Object, ByVal e As System.Web.UI.ImageClickEventArgs)
  3.      Dim txtDate as TextBox
  5.      ParentControl = DirectCast(sender, Control).Parent
  6.      txtDate = ParentControl.FindControl("txtIBeginDate")
  8.      Calendar.VisibleDate = CDate(txtDate.Text)
  9.      Calendar.Visible = True  
  10.     End Sub
This displays the calendar with the month I would expect. However, I then want to change the text property of my textbox (txtIBeginDate) with the date that was selected from the calendar control.

I am doing this using the calendar's selectionchange d event using the following code.

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  1.     Protected Sub Calendar_SelectionChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Calendar.SelectionChanged
  2.         Calendar.Visible = False
  3.         Dim txtDate As TextBox
  5.         txtDate = ParentControl.FindControl(Session("txtIBeginDate"))
  6.         txtDate.Text = Calendar.SelectedDate.ToShortDateString
  7.     End Sub
If I step through my code in debug everything seems to get set correctly. However, when my page is redisplayed the value in my textbox is left unchanged.

Can anyone explain what I am doing wrong?
Nov 6 '08 #1
1 2032
1,208 Recognized Expert Top Contributor
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  1. Dim txtDate As TextBox 
  2. txtDate = ParentControl.FindControl(Session("txtIBeginDate")) 
  3. txtDate.Text = Calendar.SelectedDate.ToShortDateString 
I see here you are dimming txtDate as TextBox... in your aspx code do you have something like this
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  1. <asp:textbox runat="server" id="txtDate"></asp:textbox>
If so there is no need to dim txtDate as TextBox. i'm not 100% sure this is the problem you are experiencing.. Also another look into things... in your page load are you setting txtDate.text to anything? maybe you need an ispostback check.
Nov 7 '08 #2

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