Retrieve ItemTemplate control value in Gridview RowUpdating event

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XML

<asp:TemplateField HeaderText="category" HeaderStyle-CssClass="gridview_header" ItemStyle-CssClass="gridview_text" ItemStyle-Width="100px">
    <itemtemplate>
        <asp:Label ID="lblcategory" runat="server" Text='<%#Eval("category") %>'>
        </asp:Label>
    </itemtemplate>
    <edititemtemplate>
        <asp:TextBox ID="txtcategory" runat="server" Text='<%#Eval("category") %>'>
        </asp:TextBox>
    </edititemtemplate>
</asp:TemplateField>

C#

protected void GvCategory_RowUpdating(object sender, GridViewUpdateEventArgs 
{
    Label category = (Label)GvCategory.Rows[e.RowIndex].FindControl("lblcategory");
    string categ=category.Text.ToString();
}

I am unable to retrieve the value of label lblcategory. I am getting an error Object reference not set to an instance of an object.

Please help me find the issue.

Thanks.

Posted 26-Jan-11 22:59pm

ram chandar b

Updated 26-Jan-11 23:29pm

v3

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Ankur^\m/ 27-Jan-11 5:11am

Please use 'PRE' tag to surround your code snippet.

TejuKrishna 27-Jan-11 5:15am

those errors occurs when control id is some mis spelled or incorrect. pls check exact spelling of your label control id

4 solutions

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Ryan Zahra · Answer 1 · 2011-01-26T23:11:00

Solution 1

Your problem is that you must find the control that is in the first cell, not in the row.

Label category = (Label)GvCategory.Rows[e.RowIndex].Cell[0].FindControl("lblcategory");

Posted 26-Jan-11 23:11pm

Ryan Zahra

Comments

Sandeep Mewara 27-Jan-11 5:44am

Comment from OP:
I used the above code but still getting the same error..

Ryan Zahra 27-Jan-11 5:52am

Worked for me.
Please make sure that the cell index is pointing to the correct column. That is if the lblCategory is found in the first column, the cell index is 0, if the lblCategory is found in the second column, the cell index is 1 and so on.

dheeraj4u · Answer 2 · 2011-01-26T23:49:00

Solution 3

hi,

use quickwatch to see value is comin in (Label)GvCategory.Rows[e.RowIndex].FindControl("lblcategory");

use #Bind("...")

Posted 26-Jan-11 23:49pm

dheeraj4u

Mohd Wasif · Answer 3 · 2011-01-27T18:49:00

Solution 4

<columns> <asp:boundfield datafield="category" headertext="Category" />
Use bound fields instead of templete field and
in code behind use as and give control as per your choice

Textbox txtcategory=(TextBox)GvCategory.Rows[e.RowIndex].Cells[0].Controls[0].

use it's working

Posted 27-Jan-11 18:49pm

Mohd Wasif

Updated 27-Jan-11 18:51pm

v2

chandra1209 · Answer 4 · 2012-10-29T00:08:00

Solution 5

You are already in the edit mode, So you may not be able to access the text value of the label(i.e.Lblcategory). In order to retrieve the values of the textbox it is better to write the code in the Gridview_RowEditing( ) event.

Posted 29-Oct-12 0:08am

chandra1209