How to validate the url using c#?

Question

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How to check that a uri string is valid

I have a text box where user is supposed to enter a URL , How can I programmatically figure out the a URL that user has been entered is valid or not ,If it valid have to process further process else have to enter valid url?

I try this code:

string url = textBox1.Text;
if (!url.StartsWith("http://"))
    url = "http://" + url;
Uri myUri;
if(Uri.TryCreate(url,UriKind.RelativeOrAbsolute,out myUri))
{
    //use the uri here
}
else
{
    MessageBox.Show("Please Enter the Absolute URL name");
    textBox1.Clear();
    textBox1.Focus();
}

why not `Uri.TryCreate`?? (http://msdn.microsoft.com/en-US/library/system.uri.trycreate.aspx)? or what do you mean by `valid`? reachable (reachable within your vpn, or globally, ...)? or just spec-valid (http://www.w3.org/Addressing/URL/url-spec.txt)? — , Nov 06 '12 at 11:45
Can you be a bit more specific on what you consider to be a 'valid' url? Does it just have to match a pattern or does it have to resolve to a document/page/resource? — KazR, Nov 06 '12 at 11:48

score -1 · Answer 1 · edited May 23 '17 at 12:28

-1

This answer is from a similar Question A better way to validate URL in C# than try-catch?

string myString="http://someUrl";
Uri myUri;
if(Uri.TryCreate(myString,UriKind.RelativeOrAbsolute,out myUri)
{
    //use the uri here
}

edited May 23 '17 at 12:28

Community

1
1

answered Nov 06 '12 at 11:47

Ahmad

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I tried this code but it didnt check properly – Gan Nov 06 '12 at 11:48
By use of this code, if i type any content like(afdafasd) it take as valid url onl? – Gan Nov 06 '12 at 11:49

How to validate the url using c#?

1 Answers1