Formview child control data retrieval

18 Jul 2006 8:46 PM

Geek

Guys,

I need help with the FormView control. I have read alot of posts about
retrieval of data from child control but I am failing. for some reason.
I am trying to get the data so I can use the FormView to eit the data
and update I had to put the link buttons and everything. Everything is
working. And I can see the data in Textbox, but it is throwing an
exception to check for a null, and I know for sure it not null cos I am
binding the value to it. I am including the code that I am using to
retrieve value from fromview and this exapmple I have picked up by one
of the posts that actually discusses an issue. Can you please guide me
in this regard. Any Help will be appreciated. Thanks,

Dim some As New TextBox
some = CType(FormViewNotes.Row.FindControl("TxtBoxEdt1"),
TextBox)
' Response.Write(some.Text)

20 Jul 2006 8:29 PM

Alessandro Zifiglio

hi geek, for me it works. What are you doing differently from the small test
below. As you can see, I am able to retrieve the value in the page_load
phase itself, and the value is output to screen. By the way, there is a good
example on msdn, on how to update using the formview control. Here is the
reference :
http://msdn2.microsoft.com/en-us/library/system.web.ui.webcontrols.formview.itemupdated.aspx

Regards,
Alessandro Zifiglio
http://www.AsyncUI.net

<%@ Page Language="VB" %>
<%@ Import Namespace="System.Data" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As
System.EventArgs)
        If (Not Page.IsPostBack) Then
            Dim values As New ArrayList()
            values.Add("Apple")
            FormView1.DataSource = values
            FormView1.DataBind()
        End If

        ' Use the Row property to retrieve the data row from
        ' the FormView control.
        Dim row As FormViewRow = FormView1.Row

        Dim tb1 As TextBox = CType(row.FindControl("TextBox1"), TextBox)
        If (tb1 IsNot Nothing) Then
            Response.Write("<br /> Found textbox1 value in Page_Load phase :
" & tb1.Text)
        End If
    End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:FormView ID="FormView1" runat="server">
        <ItemTemplate>
            <asp:TextBox ID="TextBox1" Text='<%# Container.DataItem %>'
runat="server"></asp:TextBox>
        </ItemTemplate>
        </asp:FormView>

    </div>
    </form>
</body>
</html>

This is the output i get in the rendered page :

Found textbox1 value in Page_Load phase : Apple

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"Geek" <corr***@hotmail.com> ha scritto nel messaggio
news:1153255612.317408.109730@h48g2000cwc.googlegroups.com...
> Guys,
>
> I need help with the FormView control. I have read alot of posts about
> retrieval of data from child control but I am failing. for some reason.
> I am trying to get the data so I can use the FormView to eit the data
> and update I had to put the link buttons and everything. Everything is
> working. And I can see the data in Textbox, but it is throwing an
> exception to check for a null, and I know for sure it not null cos I am
> binding the value to it. I am including the code that I am using to
> retrieve value from fromview and this exapmple I have picked up by one
> of the posts that actually discusses an issue. Can you please guide me
> in this regard. Any Help will be appreciated. Thanks,
>
> Dim some As New TextBox
> some = CType(FormViewNotes.Row.FindControl("TxtBoxEdt1"),
> TextBox)
> ' Response.Write(some.Text)
>

25 Jul 2006 4:57 AM

Geek

Dear Alessandro Zifiglio ,

I finally got it to working it is pretty easy. I thought I can access
control any time in a container regardless of the mode of the
containeer. What I did is first I replicate all the controls I need
name em same, as they are in ItemTemplate and then later retrievd them
after changing mode I really appreciate your help on this. Thanks,