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In order to validate string only input, you can use OnKeyDown Client-side event in WebCombo.

In this topic, you will learn how to implement the method.

To validate string only input Client-side event

  1. Drag a WebCombo instance into the WebForm.
  2. Add the following code in client side:

  3. Invoke WebCombo1_OnKeyDown() function in OnKeyDown client side event of WebCombo.
  4. Run the project.