Validate URL programmatically using asp.net C#

Posted by Gopal_nivas under ASP.NET on 10/31/2011 | Points: 10 | Views : 9178 | Status : [Member] | Replies : 5

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hi..

i need to validate URL using c#.

the url must contain extension of a specific types like pdf,doc,docx,jpg etc.

so i need to validate the URL as well as it must contain extension.

how to do that..
need ur suggetsions with examples
regards
gopal.s

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Posted by: Mdjack on: 10/31/2011 [Member] Starter | Points: 25

0	Hi Gopal, try the following example string url = "www.google.com"; //here u can assign ur URL if(UrlIsValid(url)) { Response.Write("The URL '" + url + "' is valid."); } else { Response.Write("The URL '" + url + "' is NOT valid."); } public static bool UrlIsValid(string HostName) { bool br = false; try { IPHostEntry ipHost = Dns.Resolve(HostName); br = true; } catch (SocketException se) { br = false; } return br; } N. MOHAMED ZACKKARIAH Gopal_nivas, if this helps please login to Mark As Answer. \| Alert Moderator

Hi Gopal,

try the following example

string url = "www.google.com"; //here u can assign ur URL
if(UrlIsValid(url)) {
Response.Write("The URL '" + url + "' is valid.");
} else {
Response.Write("The URL '" + url + "' is NOT valid.");
}

public static bool UrlIsValid(string HostName)
{
bool br = false;
try {
IPHostEntry ipHost = Dns.Resolve(HostName);
br = true;
}
catch (SocketException se) {
br = false;
}
return br;
}

N. MOHAMED ZACKKARIAH

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Posted by: Blessyjees on: 10/31/2011 [Member] Bronze | Points: 25

0	Hi, could you specify some sample urls what you want to validate. Blessy Baby Digitalmesh Softech pvt Ltd https://blessybaby.wordpress.com/ Gopal_nivas, if this helps please login to Mark As Answer. \| Alert Moderator

Posted by: Gopal_nivas on: 10/31/2011 [Member] Starter | Points: 25

0	hi blessyjees, thanks for ur reply.. sample urls are below. http://www.xm.ie/aboutxml/wordsample2.doc http://www.aeab.org/sample_refrences.pdf need ur suggestions with examples regards gopal.s Gopal_nivas, if this helps please login to Mark As Answer. \| Alert Moderator

Posted by: Ndebata on: 11/1/2011 [Member] Starter | Points: 25

0	Try to use a regular expression validator something like Regex.IsMatch("sitename", @"^[\w]+(.doc\|.docx\|.pdf)$") Gopal_nivas, if this helps please login to Mark As Answer. \| Alert Moderator

Posted by: Mittaikariss on: 11/2/2011 [Member] Bronze | Points: 25

0	Regex re = new Regex(@"^www.[a-zA-Z0-9]{1,15}.(com\|org\|ie\|doc\|docx\|pdf)$"); if (!re.IsMatch(txturl.Text)) { MessageBox.Show(".........................................."); } ^www.[a-zA-Z0-9]{1,15}.(com\|org\|ie\|doc\|docx\|pdf)$ http://www.invomtech.com/ ....sundarsowmia.... Gopal_nivas, if this helps please login to Mark As Answer. \| Alert Moderator

Regex re = new Regex(@"^www.[a-zA-Z0-9]{1,15}.(com|org|ie|doc|docx|pdf)$");



            if (!re.IsMatch(txturl.Text))



            {



                MessageBox.Show("..........................................");



            }

^www.[a-zA-Z0-9]{1,15}.(com|org|ie|doc|docx|pdf)$

http://www.invomtech.com/

....sundarsowmia....

Gopal_nivas, if this helps please login to Mark As Answer. | Alert Moderator

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