C1Combobox data binding Performance Issue

C1Combobox data binding Performance Issue

Posted by: shaji on 23 July 2019, 7:09 am EST

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  shaji

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  Posted 23 July 2019, 7:09 am EST

  In our windows application, we have a C1Combobox control with the below properties set.
  
  AutoCompleteMode=Suggest
  
  AutoCompleteSource=ListItems
  
  AutoSuggestMode=C1.Win.C1Input.AutoSuggestMode.Contains

  This combo is used to search the list items from middle of the string, and it’s working fine. But the problem is, it’s taking too much time to bind the items. Even for just 1000 items, it take around 6 seconds to load the items from data base. For binding the data source we use the below code:

  ItemsDataSource = datatable
  
  ItemsDisplayMember = “”

  ItemsValueMember=“”
  
  UseItemsBindingSource = True

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  prabhat.sharma

  

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  Posted 24 July 2019, 4:25 am EST

  Hello,

  Sorry I could not replicate the performance issue at my end even when I am adding 3000+ items in my combobox.​
  
  ​
  
  Please go through the attached sample and modify it accordingly to replicate the issue so that I can narrow down the problem.​
  
  ​
  
  Thanks and Regards,​
  
  Prabhat Sharma.
  
  ComboboxPreformanceDemo.zip

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  shaji

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  Posted 25 July 2019, 1:47 am EST

  Thank you for the reply,

  We have checked the link file you send and we observed that the issue still persists…
  
  We have resolved the binding issue with combobox, but now the problem is that it will take an average time of 8 to 10 seconds to list the items in combobox.

  You can check the attached file, on that we have implemented two buttons,
  
  1st button works with your code
  
  2nd button is works on our code

  We are using C1.Win.C1Input.4.dll and version no is :4.0.20182.314

  ComboboxPreformanceDemo.zip

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  prabhat.sharma

  

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  Posted 25 July 2019, 6:18 am EST

  Hello,

  Yes I could observe the issue with your mentioned build.

  I have also checked it with latest build and observe that there is no performance issue in that. So I will suggest you to check this with the latest build i.e. 4.0.20192.375 and let me know your observations.

  I am attaching GIF files of your given sample with both the builds(old and latest), please have a look.

  Thanks and Regards,
  
  Prabhat Sharma.
  
  ComboBox.zip