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Toggle Asc/Desc Sorting Gridview Columns

/ Published in: C#
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When I first used this code, it was in the GridView_OnSorting event. This will sort the Sort Expression and Sort Direction in the ViewState. In the fill_grid() function I will pull these values from the ViewState to construct the sort.

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  1. SortDirection sortdir = SortDirection.Ascending;
  2.  
  3. if (ViewState["SortDirection"] != null)
  4. {
  5.      if ((string)ViewState["sortexp"] == e.SortExpression)
  6.      {
  7.           sortdir = (SortDirection)ViewState["SortDirection"] == SortDirection.Ascending ? SortDirection.Descending : SortDirection.Ascending;
  8.      }                
  9. }
  10.  
  11. string sortexp = e.SortExpression;
  12. ViewState["sortexp"] = sortexp;
  13. ViewState["SortDirection"] = sortdir;
  14. fill_grid();

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