How to Assign a Value to Gridview Cell on the Row Editing event RSS

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  ashiqf

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  How to Assign a Value to Gridview Cell on the Row Editing event

  May 03, 2012 12:37 PM|LINK

  Hi All,

  I have the below to assign a value to cell in gridview on the rowediting event which I am not sucessfull. Please find the code below:

  protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
      {
          TextBox asdf = ((TextBox)GridView1.Rows[e.NewEditIndex].FindControl("TextBox1"));
          asdf.Text = Session["req_name"].ToString();
      }

  I am getting Object reference not set to an instance of object.

  I am using a templatefield. I've also tried without converting to a template field. The code is:

  GridView1.Rows[e.NewEditIndex].Cells[15].Text = Session["req_name"].ToString();

  Which is also not working. Please help.

  Does this reply help you? Mark as an answer
  Ashiq
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  robwscott

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  Re: How to Assign a Value to Gridview Cell on the Row Editing event

  May 03, 2012 01:00 PM|LINK

  are you sure that you have something in that session variable?

  you should ALWAYS check this, meaning:

  TextBox asdf = ......
  
  if (Session["req_name"] != null)
  {
        asdf.Text = Session["req_name"].ToString();  // put a breakpoint here and see if the session variable is populated
  }

  also i noticed this

  Please post your code for us to help!!
  Mark Answered if it helps - Good luck!
  Cheers!
  Design And Align
  - Rob
  
  • Edited by robwscott on May 03, 2012 01:01 PM
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  amit.jain

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  Re: How to Assign a Value to Gridview Cell on the Row Editing event

  May 03, 2012 01:04 PM|LINK

  Set new value in RowUpdating event 

  protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
  {

  TextBoxasdf = (TextBox)GridView1.Rows[e.RowIndex].FindControl("TextBox1");

  Don't say thanks rather mark my reply as "Answer" if it helps you
  amiT jaiN
  
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  karthicks

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  Re: How to Assign a Value to Gridview Cell on the Row Editing event

  May 03, 2012 01:06 PM|LINK

  hi, one thing you should understood that the edit template control will be rendered only after setting grid.EditIndex=e.NewEditIndex and Grid.DataBind(); i.e do like below

  protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
      {
        GridView1.EditIndex=e.NewEditIndex;
        GridView1.DataSource=ds;
         GridView1.DataBind(); // you should rebind the grid to set EditIndex
          TextBox asdf = ((TextBox)GridView1.Rows[e.NewEditIndex].FindControl("TextBox1"));
          asdf.Text = Session["req_name"] ==null? "": Session["req_name"].ToString();
      }

  Thanks,
  Karthick S
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  ziaulrahman

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  Re: How to Assign a Value to Gridview Cell on the Row Editing event

  May 03, 2012 01:41 PM|LINK

  Session["req_name"].ToString(); is not getting any value,So it cannot assign anything to the TextBox.

  BAAZ.
  
  Mark answer if it helps.
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  ashiqf

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  868 Points

  397 Posts

  Re: How to Assign a Value to Gridview Cell on the Row Editing event

  May 03, 2012 04:05 PM|LINK

  Hi Karthik,

  I am not binding to a dataset. I am using a sqldatasource:

  SqlDataSource1.SelectCommand = "SELECT * FROM [ADCleanUpData] WHERE (LANID like '%" + TextBox1.Text + "%' or DisplayName like '%" + TextBox1.Text + "%') and ProjectID="+TextBox2.Text+"";
              SqlDataSource1.DataBind();

  Its not working still.

  Does this reply help you? Mark as an answer
  Ashiq
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  basheerkal

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  Re: How to Assign a Value to Gridview Cell on the Row Editing event

  May 03, 2012 04:26 PM|LINK

  It is impossible to get the controls in EditItemTemplate from RowEditing event. You can get it in prerender event.

  protected void GridView1_PreRender(object sender, EventArgs e)
      {
          if (GridView1.EditIndex != -1)
          {
              TextBox TB = (TextBox)(GridView1.Rows[GridView1.EditIndex].FindControl("TextBox1"));
              TB.Text = "Some Text";
          }
      }

   

  Kindly mark this post as "Answer", if it helped you.
  
  (Talk less..Work more)
  • Edited by ashiqf on May 04, 2012 07:52 AM
  • Edited by ashiqf on May 04, 2012 07:53 AM
  • Marked as answer by ashiqf on May 04, 2012 07:55 AM
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  ashiqf

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  Re: How to Assign a Value to Gridview Cell on the Row Editing event

  May 04, 2012 07:55 AM|LINK

  It worked Great. Thanks for your help

  Does this reply help you? Mark as an answer
  Ashiq