[RESOLVED] Retreive GridView Textbox

[Developer2007]

Hi,

I am having a few problems trying to get a textbox I added to a gridview.

Adding the textbox to gridview in the form load event

Dim txt As New TextBox
txt.ID = "txt1"
txt.Width = 20
txt.Text = 1
GridView1.Rows(0).Cells(0).AddAt(0, txt)

change value in textbox and click Update

Protected Sub btnUpdate_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
lblUpdateValue.Text = ctype(GridView1.Rows(0).Cells(0).Controls(0), textbox).Text
End Sub

The problem is that there is now no textbox in that cell even tho it is visible on webpage and I can even type in it?????

Can someone please help shed some light. Thanks in advance.

[brin351]

Is that code in page load run every load or not page.ispostback because dynamically added controls need to be recreated every postback to maintain their state. Also you set the text value which would overwrite user entered values unless it was done only first page load.

[Developer2007]

Is that code in page load run every load or not page.ispostback because dynamically added controls need to be recreated every postback to maintain their state. Also you set the text value which would overwrite user entered values unless it was done only first page load.

Oh ok. I see. Is there a way to keep the control there?

Ok I have now added.

                        <asp:TemplateField>
                            <ItemTemplate>
                                <asp:TextBox id="txt1" runat="server">
                                </asp:TextBox>
                            </ItemTemplate>
                        </asp:TemplateField>

However when I attempt to change the value and click update txt1.text reads as "" instead of the value I typed in.

Edited: Adding autopostback = "True" to the textbox works but only if I deselect the textbox first then click update. Clicking update with the textbox selected doesn't give me the updated value.

[gep13]

Hey,

I am not sure that I follow what you are saying.

What exactly are you trying to achieve here. I think the bigger picture will help to identify the correct solution.

Gary

[nepalbinod]

First of all, your syntax is incorrect.

GridView1.Rows(0).Cells(0).AddAt(0, txt)

Should be

GridView1.Rows(0).Cells(0).Controls.AddAt(0, txt)

Thence try to cast the control, check it if it's not nothing, and then use it's value.

        Dim TextBoxVar As TextBox = TryCast(GridView1.Rows(0).Cells(0).FindControl("txt1"), TextBox)

        If TextBoxVar IsNot Nothing Then
            lblUpdateValue.Text = TextBoxVar.Text
        End If

Hope this helps .

[TimBebe]

<asp:DataGrid CellPadding="3" ID="DataGrid1" runat="server"
OnItemCommand="Recordoperate" 

second build the method

private void RecordOperate(Object sndr, DataGridCommandEventArgs e)
 {
 TextBox txtb = (TextBox)e.item.FindControl("Textbox1")

string str = txtb.Text

//ToDo : use the variable in anything you want

}

Hope this helps....

[nepalbinod]

<asp:DataGrid CellPadding="3" ID="DataGrid1" runat="server"
OnItemCommand="Recordoperate" 

second build the method

private void RecordOperate(Object sndr, DataGridCommandEventArgs e)
 {
 TextBox txtb = (TextBox)e.item.FindControl("Textbox1")

string str = txtb.Text

//ToDo : use the variable in anything you want

}

Hope this helps....

Hey, you should put semicolon on line endings, or else you will get syntax errors. Meanwhile, you should check if the control was properly cast before using it.

private void RecordOperate(object sndr, DataGridCommandEventArgs e)
{
    TextBox txtb = (TextBox)e.item.FindControl("Textbox1");
    
    if (txtb != null) {
        string str = txtb.Text;
        //ToDo : use the variable in anything you want
    }
}

[Developer2007]

Hey guys. I bit off an update. The problem was me changing the ID of the gridviewrow.

Finding this made my weekend a whole lot better. Thanks for all the help everyone.

[gep13]

Hey,

Glad to hear that you got it working!!

Gary