set the readonly property to textbox in gridview using dropdownlist RSS

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  shwetha.gadd...

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  65 Posts

  set the readonly property to textbox in gridview using dropdownlist

  May 07, 2012 12:22 PM|LINK

  protected void Change(object sender, EventArgs e)
      {
            GridViewRow row = GridView1.SelectedRow;
              DropDownList dlMng = (DropDownList)sender;
              TextBox txtreason = (TextBox)GridView1.SelectedRow.FindControl("txtreason");
              if (dlMng.SelectedIndex == 0)
              {
                  txtreason.ReadOnly = true;
              }
              if (dlMng.SelectedIndex == 1)
              {
                  txtreason.ReadOnly = false;
              }
          }

  This is my mycode:

  In this code i had a error at this line:

       TextBox txtreason = (TextBox)GridView1.SelectedRow.FindControl("txtreason");

  The error is:

  Object reference not set to an instance of an object.

  any one pls help me...

  C#.net

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  cninjas

  Contributor

  4868 Points

  851 Posts

  Re: set the readonly property to textbox in gridview using dropdownlist

  May 07, 2012 12:29 PM|LINK

  Hi

  The findcontrol couldn't able to find the textbox. Do check whether you are getting Gridview.Selectedrow

  It should return you GridViewDataRow

  hope it helps, thanks.

  Microsoft Community Contributor 2011
  Niranjan
• • Reply
  

  shwetha.gadd...

  Member

  132 Points

  65 Posts

  Re: set the readonly property to textbox in gridview using dropdownlist

  May 07, 2012 12:33 PM|LINK

  I want to insert bulk from my grid view...

  Now i deleted seletced row from my code now it shows the same error at 'txtreason'

  there is any another way?

• • Reply
  

  cninjas

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  851 Posts

  Re: set the readonly property to textbox in gridview using dropdownlist

  May 08, 2012 04:21 AM|LINK

  hi

  Are you trying to get the single row? or you want to loop thru all the rows?

  TextBox txtreason = (TextBox)GridView1.Rows[0].FindControl("txtreason");

  Try this....Please clarify whether the Dropdown will be avlb for each rows? or on the header

  thanks.

  Microsoft Community Contributor 2011
  Niranjan
• • Reply
  

  shwetha.gadd...

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  132 Points

  65 Posts

  Re: set the readonly property to textbox in gridview using dropdownlist

  May 08, 2012 04:38 AM|LINK

  Thanks its working fine for single row where row id is 0, but i need to select individual rows every time why because dropdown is available in each row... 

  for example in my grid i have 10 rows when ever i select 1st row that first row textbox only become readonly...

  pls help me for this...

  • Edited by shwetha.gadde on May 08, 2012 04:39 AM
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  cninjas

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  851 Posts

  Re: set the readonly property to textbox in gridview using dropdownlist

  May 08, 2012 05:51 AM|LINK

  hi

  I think the onchange event is mapped to your dropdown selectedindex changed?

  just include this line in the event

  DropDownList ddl = (DropDownList)sender;
  GridViewRow row = (GridViewRow)ddl.Parent.Parent;
  int idx = row.RowIndex;

  Can you check this? hope it helps,thanks

  Microsoft Community Contributor 2011
  Niranjan
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  cninjas

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  4868 Points

  851 Posts

  Re: set the readonly property to textbox in gridview using dropdownlist

  May 08, 2012 05:54 AM|LINK

  protected void Change(object sender, EventArgs e)
      {
              DropDownList ddl = (DropDownList)sender;
              GridViewRow row = (GridViewRow)ddl.Parent.Parent;
              int idx = row.RowIndex;
              DropDownList dlMng = (DropDownList)sender;
              TextBox txtreason = (TextBox)GridView1.Rows[idx].FindControl("txtreason");
              if (dlMng.SelectedIndex == 0)
              {
                  txtreason.ReadOnly = true;
              }
              if (dlMng.SelectedIndex == 1)
              {
                  txtreason.ReadOnly = false;
              }
          }

  Microsoft Community Contributor 2011
  Niranjan
  • Edited by cninjas on May 08, 2012 05:55 AM
  • Marked as answer by shwetha.gadde on May 08, 2012 08:10 AM
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  MahadTECH

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  1659 Posts

  Re: set the readonly property to textbox in gridview using dropdownlist

  May 08, 2012 06:04 AM|LINK

  Try this Code:

  protected void Change(object sender, EventArgs e)
      {
            GridViewRow row = GridView1.SelectedRow;
              DropDownList dlMng = (DropDownList)sender;
              TextBox txtreason = (TextBox)GridView1.SelectedRow.FindControl("txtreason");
              if (dlMng.SelectedItem = 0) // OR dlMng.SelectedValue = 0
              {
                  txtreason.ReadOnly = true;
              }
              if (dlMng.SelectedItem = 1) // OR dlMng.SelectedValue = 1
              {
                  txtreason.ReadOnly = false;
              }
          }

  
  
  

  Sincerely,
  Mahad Bin Mukhtar
  Remember to Mark the replies as Answers
  The easiest day was 'yesterday'.
  MCP, MCSD
  For .NET TECH Blog
  • Edited by MahadTECH on May 08, 2012 06:08 AM
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  shwetha.gadd...

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  132 Points

  65 Posts

  Re: set the readonly property to textbox in gridview using dropdownlist

  May 08, 2012 06:04 AM|LINK

  Thank you....

  Its working fine....

• • Reply
  

  MahadTECH

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  Re: set the readonly property to textbox in gridview using dropdownlist

  May 08, 2012 06:07 AM|LINK

  Which Answer is working Fine? Mark As Answer! 

  Sincerely,
  Mahad Bin Mukhtar
  Remember to Mark the replies as Answers
  The easiest day was 'yesterday'.
  MCP, MCSD
  For .NET TECH Blog