Accessing CheckBox in headertemplate of datagrid in datagrid's pageindexchanged event RSS

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  anupreethi20...

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  Accessing CheckBox in headertemplate of datagrid in datagrid's pageindexchanged event

  Jul 10, 2008 09:35 AM|LINK

  i am trying to access CheckBox in headertemplate of datagrid, soon after binding data to the grid in the pageindexchanged event.

  i get a NullReferenceException when i do that. Could not find the reason. i have already done this accessing of header control elsewhere in my application, but have not had any problem before. Is it any thing to do with the pageindexchanged event.

  i access the header control using

  System.Web.UI.Control header = _kdmGeneratorGrid.Controls[0].Controls[0];

  ((CheckBox)header.FindControl("_selectAllChkBx")).Checked = Convert.ToBoolean(_isAllSelected.Value);

   

  i have done the same in the _selectAllChkBx onCheckedChange Event.

  Please help.

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  ramireddyind...

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  Re: Accessing CheckBox in headertemplate of datagrid in datagrid's pageindexchanged event

  Jul 10, 2008 11:46 AM|LINK

  CheckBox chkSelect = (CheckBox)GridView1.HeaderRow.FindControl("chkSelect");  // here in paranthesis of findcontrol() method, give the id of checkox in headertemplate.

  Give a man a fish and you feed him for a day. Teach a man to fish and you feed him forever.
  
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  anupreethi20...

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  Re: Accessing CheckBox in headertemplate of datagrid in datagrid's pageindexchanged event

  Jul 10, 2008 11:56 AM|LINK

  it is not a grid view, it is a datagrid. Datagrid does not have a property called HeaderRow. I sorted out the issue by fetching the header control using Datagrid.Controls[0].Controls[1].

  What i am not able to understand is, in CheckedChange event of control in itemtemplate of the datagrid i fetched using Datagrid.Controls[0].Controls[0], whereas in pageIndexChanged event i fetched it as Datagrid.Controls[0].Controls[1]. what is the difference. how does grid structure differ in the above two cases. wierd....

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  Pushkar

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  Re: Accessing CheckBox in headertemplate of datagrid in datagrid's pageindexchanged event

  Jul 10, 2008 12:09 PM|LINK

   MyCheckBox = (CheckBox)DataGrid1.Items(0).FindControl("CheckBox1");

  For further detail.

   http://66.129.67.4/p/1230647/2229994.aspx#2229994
   

  Thanks & With Best Regards
  ====================================
  Pushkar
  
  • Edited by Pushkar on Jul 10, 2008 12:11 PM
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  anupreethi20...

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  Re: Accessing CheckBox in headertemplate of datagrid in datagrid's pageindexchanged event

  Jul 10, 2008 12:20 PM|LINK

  DataGrid1.Items(0) will return the first item row and will not return the header row.

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  Samu Zhang -...

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  Re: Accessing CheckBox in headertemplate of datagrid in datagrid's pageindexchanged event

  Jul 11, 2008 06:54 AM|LINK

  Hi anupreethi2001 ,

  Try this way:

  Table childtable = dg.Controls[0] as Table;

  CheckBox chk = childtable.Rows[0].FindControl("idhere") as CheckBox;

   

  
  Samu Zhang
  Microsoft Online Community Support
  
  Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question.
  • Marked as answer by Samu Zhang - MSFT on Jul 16, 2008 10:09 AM
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  praveen.sing...

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  Re: Accessing CheckBox in headertemplate of datagrid in datagrid's pageindexchanged event

  Nov 06, 2012 05:12 AM|LINK

  Thanks Dear Its solv my problem

  Jai Durga Ji Ki
  Praveen Singh
  Software Engineer
  http://praveensinghbisen.blogspot.com/