Click here to Skip to main content
12,302,493 members (65,041 online)
Rate this:
 
Please Sign up or sign in to vote.
See more: ASP.NET
how to slove this problam
if (e.CommandName == "Update")
      {
          GridViewRow gvrow = (GridViewRow)((ImageButton)e.CommandSource).NamingContainer;
          TextBox txtbarndFaName = (TextBox)gvrow.FindControl("TFBrandFaNameedit");
          TextBox txtbarndEnName = (TextBox)gvrow.FindControl("TFBrandEnNameedit");
          DropDownList txttypepartEnName = (DropDownList)gvrow.FindControl("DDTypehardware");
          int a = int.Parse(txttypepartEnName.SelectedValue);
          SqlDupdate.UpdateParameters["FBrandFaName"].DefaultValue = txtbarndFaName.Text;
          SqlDupdate.UpdateParameters["FBrandEnName"].DefaultValue = txtbarndEnName.Text;
       SqlDupdate.UpdateParameters["FPartCatID"].DefaultValue = txttypepartEnName.SelectedValue.ToString();
 
          SqlDupdate.Update();
      }

this error:
System.NullReferenceException: Object reference not set to an instance of an object.

DropDownList txttypepartEnName = (DropDownList)row.FindControl("DDTypehardware

the type filed db is smallint.
how to convert SqlDupdate.UpdateParameters["FPartCatID"].DefaultValue = txttypepartEnName.SelectedValue.ToString();

to int.
Posted 11-Nov-12 5:10am

1 solution

Rate this: bad
 
good
Please Sign up or sign in to vote.

Solution 1

Check if your control is null before moving into the update.Its possible there is a row in your grid with a control that is null, so txttypepartEnName is null at some point.
  Permalink  
Comments
saeed1364 11-Nov-12 12:41pm
   
iam check. contorl is not null

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

  Print Answers RSS
Top Experts
Last 24hrsThis month


Advertise | Privacy | Mobile
Web01 | 2.8.160530.1 | Last Updated 11 Nov 2012
Copyright © CodeProject, 1999-2016
All Rights Reserved. Terms of Service
Layout: fixed | fluid

CodeProject, 503-250 Ferrand Drive Toronto Ontario, M3C 3G8 Canada +1 416-849-8900 x 100