Textbox validation

Sujay Anand

How to validate the input box using Asp.net?

The default value is to be +971. If the input box is +971 consider this as empty box validation. Or else added successfully.

4 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vrushali Ghodke6y ago
There is a control called RegularExpressionValidator available with ASP.NET. Use that to validate the TextBox. Make sure you set the ControlToValidate and the ValidationExpression for it. This will validate on both the client-side and the server-side.

Try this
"TextBox1" runat="server"> "RegularExpressionValidator1" runat="server" ControlToValidate="TextBox1" ErrorMessage="RegularExpressionValidator" ValidationExpression="[0-9]{10}">
Or check this link to know more about control validation

https://www.c-sharpcorner.com/UploadFile/puranindia/validation-controls-in-Asp-Net/\>\>
Mageshwaran R6y ago
Hi,
please check this link:
https://www.w3schools.com/jsref/prop_text_defaultvalue.asp
Sujay Anand6y ago
Can you say in asp.net?
Neha Trivedi6y ago
Hi Sujay Anand,

Hope this will help you,
https://dotnetfiddle.net/QeoxYW