Newbie

leen3o · September 29th, 2006, 06:10 AM

Hi All .. New to this .NET stuff and wonder if you can help me?

I have a detailsview control and in it I have asp:textbox fields.. I have created this sub and want it to auto populate the textbox's.

Code:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
        If Not Page.IsPostBack Then
            dteCommentDate.Text = My.Computer.Clock.LocalTime.Date
            txtPostId.Text = Request.QueryString("news")
        End If
End Sub

Now the weird this is its asking me to declare dteCommentDate & txtPostId which are textbox's in my Details view..

BUT when I tried it out this code with just normal asp:textbox not in a details view control

Code:

<script runat="server">
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
        TextBox1.Text = My.Computer.Clock.LocalTime.Date
    End Sub
</script>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</asp:Content>

This works fine

... I am very confused can someone shed some light please??

Hmmm .NET ...

jbenson001 · September 29th, 2006, 01:06 PM

Since you have it embedded in a details view, you have to use the detailsview to get to the textbox. Use the DataBound event of the detialsview, and get a reference to the textbox, then set it's value

    Protected Sub DetailsView1_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles DetailsView1.DataBound
        Dim tb As New TextBox
        tb = DetailsView1.FindControl("txtPostId.Text")
        tb.Text = Request.QueryString("news")
    End Sub

Imar · September 30th, 2006, 08:19 AM

To make this work properly, you need to make a slight change to Jim's code:

Quote:

quote:Protected Sub DetailsView1_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles DetailsView1.DataBound
  Dim tb As <s>New </s>TextBox
  tb = CType(DetailsView1.FindControl("txtPostId"), TextBox)
  tb.Text = Request.QueryString("news")
End Sub

First, you don't need the new keyword, because tb is used to hold the textbox returned from FindControl.

It's also useful to cast the control returned by FindControl to a TextBox using CType, so you can access TextBox specific properties.

Finally, I changed txtPostId.Text to txtPostId in the FindControl argument as I am sure that's what Jim meant anyway....

Cheers

Imar
---------------------------------------
Imar Spaanjaars
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Author of ASP.NET 2.0 Instant Results and Beginning Dreamweaver MX / MX 2004
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