Autofill text box based on input in another text box

Question

I have two text boxes UserId and Email If user enters UserId as Hello then i want the email text box to be filled as hello@gmail.com How do I achieve this? Thanks in Advance

Viv R · Answer

Very helpful thank you

Jitendra Kumar · Answer

Mark accept it's really help you.

Jitendra Kumar · Answer

hello you do something wrong. See attached page.

Vishwan Merchant · Answer

Hi Jitendra I have tried that code but the value is not getting stored in email id text box instead the value displayed in text box is txtUser.Text @gmail.com

Jitendra Kumar · Answer

Hello Vishwan try below code. aspx code: User: Email : CS code: protected void txtUser_TextChanged(object sender EventArgs e) { txtEmail.Text = txtUser.Text + @gmail.com; }