System.NotSupportedException in FlexGrid

System.NotSupportedException in FlexGrid

Posted by: russell.foster on 5 June 2018, 5:10 pm EST

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  russell.foster

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  Posted 5 June 2018, 5:10 pm EST - Updated 4 October 2022, 2:34 am EST

  ComponentOne Studio for WinForms (.NET 4.0) 4.0.20173.286 2019.V1 4.0.20181.307 4.0.20181.307

  Seeing these exceptions when attempting to set check boxes in the grid programmatically:

  Exception: Exception thrown: ‘System.NotSupportedException’ in System.dll (“StringConverter cannot convert from System.Boolean.”). Exception thrown: ‘System.NotSupportedException’ in System.dll (“StringConverter cannot convert from System.Boolean.”)

  The exceptions are caught, however it takes a really long time to check all the row boxes because of them. Is this a known issue? if so, is there are workaround?

  Here’s the code to check the boxes:

      grid.BeginUpdate()
  
      For row = grid.Rows.Fixed To grid.Rows.Count - 1
          grid.SetCellCheck(row, 0, checkState)
      Next
  
      grid.EndUpdate()
  

  Happens with or without the Begin/End Update.

  I don’t get the same errors if I set the column data type to object, but as soon as I add data I get the true/false labels, which is no good for me. Thanks.
  
  

  

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  russell.foster

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  Posted 5 June 2018, 5:22 pm EST

  After some more digging, this only seems to affect the debugging performance, so disregard. Thanks.