C1ComboBox: Clear Funtion return exception

C1ComboBox: Clear Funtion return exception

Posted by: samo3889 on 19 December 2017, 6:15 am EST

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  samo3889

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  Posted 19 December 2017, 6:15 am EST

  Hi All,

  i use C1ComboBox
  
  when i do Clear function on C1ComoBox return exception
  
  look at the following attachment (C1ComboBox.png)

  Thanks,
  
  Saleem

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  sonu.singh

  

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  Posted 19 December 2017, 7:15 am EST

  Hi,
  
  I could not replicate the issue with latest build.
  
  http://prerelease.componentone.com/dotnet40/C1WinForms/2017-T3/C1WinForms.4_4.0.20173.286.zip

  Please check with the same build.
  
  If this does not solve your issue them share a sample application so that we can assist you further accordingly.

  Thanks,
  
  Singh

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  samo3889

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  Posted 19 December 2017, 8:45 am EST

  thank you Singh

  i found the problem

  the following line:
  
  this.cmbLoadFilterSort.DropDownStyle = (C1.Win.C1Input.DropDownStyle)System.Windows.Forms.ComboBoxStyle.DropDownList;
  
  This is what makes the problem

  but how i can clear all combobox values ?

  Thanks,
  
  Saleem

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  sonu.singh

  

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  Posted 20 December 2017, 12:03 am EST

  Hi,
  
  Please use the below suggestions:

  1. Clears all text from the textbox area of C1ComboBox.

  C1ComboBox1.TextDetached = True;
          C1ComboBox1.Clear();
  

  2. Clears all items from the C1ComboBox control.

  C1ComboBox1.Items.Clear();
  

  If you are using ItemsDataSource for items then assign it to null as:

  C1ComboBox1.ItemsDataSource = null;
  

  For more info see the documentation at http://help.grapecity.com/componentone/NetHelp/c1input/webframe.html#C1ComboBox%20Control%20Overview.html

  Hope, it will solve your issue.

  Thanks,
  
  Singh