ListBox AddItem

ListBox AddItem

Posted by: xman0002 on 18 August 2026, 9:09 am EST

• 

  xman0002

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  Posted 18 August 2026, 9:09 am EST

  How do you add variables to a ListBox?
  
  For i = 0 to 10
  
  Col1 = “AAA” & i
  
  Col2 = “BBB” & i
  
  lstTest.AddItem(Col1;Col2)
  
  Next
  
  Doesn’t work

• 

  vivek.singh

  

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  Posted 19 August 2026, 12:28 am EST

  Hello,

  For clarification, the AddItem method accepts a single string representing the row, where a semicolon is used as the default column separator. You can also customize this separator if needed via the AddItemSeparator property. For more information, refer to https://developer.mescius.com/componentone/docs/win/online-list/listforwinformsaddit

  To add multi-column variables in your loop, you can concatenate the variables into a single string using either of the ways specified below:

   
      'Option 1: Direct string interpolation
      C1List1.AddItem($"{col1};{col2}")
      'Option 2: Concatenating into a string variable
       Dim rowText As String = col1 & ";" & col2
       C1List1.AddItem(rowText)

  We have attached a sample project for your reference.

  If you have any further questions or concerns, please let us know!

  Best regards,
  
  Vivek Singh

  List_AddItemDemo.zip

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  xman0002

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  Posted 20 August 2026, 3:08 pm EST

  Thanks!

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  xman0002

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  Posted 20 August 2026, 5:41 pm EST

  Second Question - How do you set the column widths?
  
  FlexGrid : grdMenu.Cols(0).Width =50 (Works)
  
  ListBox : lstMenu.Cols(0).Width = 50 (Doesn’t Work)

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  vivek.singh

  

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  Posted 20 August 2026, 11:23 pm EST

  Hello,

  C1List supports split presentation, providing the flexibility to resize either the splits or the individual columns within them. You can adjust column widths programmatically as follows:

  c1List1.Splits[0].DisplayColumns[0].Width = 250;

  For more detailed information on C1List and its related APIs, you can refer to our official documentation: https://developer.mescius.com/componentone/docs/win/online-list/overview

  You can also check out our product samples at C:\Users<UserName>\Documents\ComponentOne Samples\WinForms\v4.8\List if you installed the samples via the ComponentOne Control Panel. Alternatively, you can access the same samples on GitHub: https://github.com/GrapeCity/ComponentOne-WinForms-Samples/tree/master/NetFramework/List

  We have attached a sample project for your reference. Please take a look, and if you have any other questions or concerns, feel free to let us know!

  Best regards,

  Vivek Singh

  List_AddItemDemoPrj.zip