In this screencast Mohammad Azam will demonstrate how to add a RegularExpressionValidator to our RequiredTextBox custom control. The RegularExpressionValidator will validate the TextBox against the custom validation expressions.

In this screencast Mohammad Azam will demonstrate how to add a RegularExpressionValidator to our RequiredTextBox custom control. The RegularExpressionValidator will validate the TextBox against the custom validation expressions.

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References:
Building RequiredTextBox Custom Server Control