How to validate Textbox to allow only website url

Question

Hi I need to validate textbox so that it can only take website url up-to domain code only. For e.g. User must insert website url as http://www.google.com. If user insert http://www.codeproject.com/Articles/334310/Understanding-ASP-NET-Validation-Techniques then it should not allow. Allowed:- http://www.google.com Not Allowed:- http://www.codeproject.com/Articles/334310/Understanding-ASP-NET-Validation-Techniques Please help.

Rajeesh Menoth · Answer

Hi // Try to navigate to the entered URL. private void btnGo_Click(object sender EventArgs e) { webBrowser1.Navigate(txtUrl.Text); } // Verify that this is an allowed web site. private void webBrowser1_Navigating(object sender WebBrowserNavigatingEventArgs e) { if (e.Url.Host != www.csharphelper.com) { e.Cancel = true; MessageBox.Show(This web site is prohibited Prohibited MessageBoxButtons.OK MessageBoxIcon.Exclamation); } } Check the following ref : Make a web browser that only allows certain web sites in C#