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by  |  02-Nov-2019 08:49

For example, we can make a textbox to be required field only when a checkbox is checked or a dropdownlist value, etc.This little article will provide you a code snippet that makes a textbox called txt Name as required field when a checkbox with id chk Required is checked.Here Mudassar Ahmed Khan has explained the following three types of character length or count validations for ASP. Here Mudassar Ahmed Khan has explained, how to perform Numeric validation in Text Box using Java Script in such a way that the Text Box will accept only numbers i.e. He has also disabled the input via Dropping and Pasting so that user is not allowed directly drop or paste content in textbox and only way to input values is by typing through Keyboard. Now you can ask questions directly to me on my new site ASPForums.

Validating text box in asp net

Validation Control are performed on client side n therefore good user experience, on the other hand you have server side validation which you can write a peiece of code to validate controls .

you just have set display="None", which gives you pop up message.

Drag one Text Box control and give it an ID of First Name Text Box, two Button controls (Submit Button and Cancel Button), and one Required Field Validator (First Name Required Field Validator). The following screen shows the form in action, and the user has pressed the Submit button without entering any text into the textbox. The Required Field Validator fails when the value in the associated control matches the value of the Initial Value property of the Required Field Validator.

This Required Field Validator forces the user to enter text into the control associated with the validator. If you want to make sure the user changes a default value placed into the control, set the control’s Text value and the Initial Value property of the Required Field Validator to the same value.

also, it will be great if we can set focus in the first control which has the error. But this code is not working for both the cases I had mentioned: 1. MSDN Community Support Please remember to click "Mark as Answer" the responses that resolved your issue.

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