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.NET Forum / ASP.NET / General / September 2007URL Validity
Is there an easy method that takes a URL string and checks if it is valid? Luke What would you consider "invalid"?  SignatureRobbe Morris [Microsoft MVP - Visual C#] .NET PropertyGrid Control - ListBox, ComboBox, and Custom Classes http://www.eggheadcafe.com/tutorials/aspnet/270e9432-d236-47e7-b1af-5cd3abe27a75 /net-propertygrid-control.aspx > Is there an easy method that takes a URL string and checks if it is valid? > > Luke Invalid as in a 404 error or if it's an image it will come back with a red "x". There be nothing at the domain. So if I passed http://google.com/ it would come back true, but if I passed http://asfsaf3985r2934.com it will come back false. > What would you consider "invalid"? > >> Is there an easy method that takes a URL string and checks if it is >> valid? >> >> Luke HttpWebRequest and HttpWebResponse There are tons of samples for these two classes. SignatureRobbe Morris [Microsoft MVP - Visual C#] .NET PropertyGrid Control - ListBox, ComboBox, and Custom Classes http://www.eggheadcafe.com/tutorials/aspnet/270e9432-d236-47e7-b1af-5cd3abe27a75 /net-propertygrid-control.aspx > Invalid as in a 404 error or if it's an image it will come back with a red > "x". There be nothing at the domain. So if I passed [quoted text clipped - 7 lines] >>> >>> Luke I have a post on how to work with HttpWebRequest here: http://blog.donnfelker.com/2007/09/13/AutomatedFormPostingWithNETASPNETsCURL.aspx You can Regex the string, but something like http://www.thisisafakesite.com/default.aspx would be seen as valid, as it is correctly formed. You would have to actually issue a request to the server and check the return code to determine if it was a real site. SignatureGregory A. Beamer MVP, MCP: +I, SE, SD, DBA ************************************************* | Think outside the box! ************************************************* > Is there an easy method that takes a URL string and checks if it is valid? > > Luke Hello Cowboy (Gregory A. Beamer), > You can Regex the string, but something like > [quoted text clipped - 12 lines] >> >> Luke You could always pass it to the URI class and see what happens. My guess is that it will choke on incorrectly formatted URI's. -- Jesse Houwing jesse.houwing at sogeti.n Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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