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ComboBox: Null, Data Source, Preselect, and Custom Value Issues

 

Issue 1: Unable to Set Null Value When Virtualization is Enabled

Steps to replicate:

  1. Run the sample.
  2. Click the "Set to existing value" button.
  3. Now click the "Set to Null value" button.

Expected Output: The ComboBox value should be set to null.
Current Output: Unable to set null value in the component.

Issue 2: Exception Occurs When Data Source is Cleared While Component Has a Value

Steps to replicate:

  1. Run the sample.
  2. Click the "Set to existing value" button.
  3. Now click the "Clear Orders" button to remove the data source.

Expected Output: No exception should occur.
Current Output: An exception occurs when clearing the data source.

 Issue 3: Preselected Value Is Cleared When Data Source Is Assigned With a Delay

Steps to replicate:

  1. Run the sample.
  2. Click the "Set data" button to assign the data source.

Expected Output: When assigning the data source, the preselected value should be set.
Current Output: The preselected value is not set when the data source is assigned with a delay.

 Issue 4: Exception Occurs When Setting a Custom Value with Nullable Integer (int?) Type. Need to handle the exception.

Steps to replicate:

  1. Run the sample.
  2. Click the "Set to value not included into the list" button.

Expected Output: No exception should occur, and the CustomValueSpecifier event should trigger.
Current Output: An exception occurs, and the CustomValueSpecifier event is not triggered when setting an integer as a custom value programmatically with TValue set to int?.