how to get id from url

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http://localhost:1163/NewProject/subject/test-subject-1.aspx

from this url how can i get the id 1(in the example) using request.QuryString.

Posted 26-May-11 1:04am

rahul dev123

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Prerak Patel · Answer 1 · 2011-05-26T01:11:00

Solution 1

from this url how can i get the id 1(in the example) using request.QuryString.
You can't.
Query string is something that follows the page after ?
Your URL doesn't use query string.

You can use Request.Url.AbsoluteUri instead.

[VB]

Dim s as String = System.IO.Path.GetFileName(Request.Url.AbsoluteUri).ToLower().Replace(".aspx", "")
Dim number as String = s.Substring(s.LastIndexOf("-") + 1)

[C#]

C#

string s = System.IO.Path.GetFileName(Request.Url.AbsoluteUri).ToLower().Replace(".aspx", "");
string number = s.Substring(s.LastIndexOf("-") + 1);

You can convert it to integer later.

If you really use query string then Request.QueryString["ID"] is enough.

Posted 26-May-11 1:11am

Prerak Patel

Updated 26-May-11 2:20am

v8

Comments

rahul dev123 26-May-11 7:15am

please send details how to store the id in a variable

Prerak Patel 26-May-11 7:20am

Updated answer accordingly.

rahul dev123 26-May-11 7:32am

if the test-subject name change for id 2 example test-physics-2 then how can i get this

Prerak Patel 26-May-11 7:36am

Then try regex (?:[a-z\-]+)(\d)+(?:\.aspx)

rahul dev123 26-May-11 7:42am

how to use regex please send me details and also previous code not working

Prerak Patel 26-May-11 7:42am

Or LastIndexOf. Updated the answer.

rahul dev123 26-May-11 7:24am

Error IO not exists current context

Prerak Patel 26-May-11 7:26am

Try System.IO or add reference to the same.

rahul dev123 26-May-11 7:36am

i used this but not working

rahul dev123 26-May-11 7:38am

Its output likes:
studentdetails?test-subject-1

Prerak Patel 26-May-11 7:42am

Seems like you have placed a wrong url in your question. Where is .aspx page?

rahul dev123 26-May-11 8:09am

string number = System.IO.Path.GetFileName(Request.Url.AbsoluteUri).ToLower().Replace(".aspx", "").Substring(s.LastIndexOf("-") + 1)

what is s. error s is does not exists

Prerak Patel 26-May-11 8:21am

My bad. Corrected.

raju melveetilpurayil 26-May-11 7:28am

my 5, I like your answer

#realJSOP · Answer 2 · 2011-05-26T01:50:00

You can't use Request.QueryString because you don't have a query string. In order to do what is is that you appear to want to do, your example URL needs to look like this:

http://localhost:1163/NewProject/subject/test-subject-1.aspx?ID=1
At that point, you can do this:

C#

int id;
Int32.TryParse(Request.QueryString["ID"], out id);

Without knowing more about your specific environment and requirements, I can't get any more specific than that, and I'm assuming that you have the programming chops to know how to ensure that your code will handle all possible contingencies regarding validty of data.

anvas kuttan · Answer 3 · 2011-05-26T01:14:00

Solution 2

hai,

if you want to get request.QuryString. you have to give QuryString.

here is the ex: will help you

MIDL

//on navigavigation gilike this aspx?ID=1 here the id the value
    http://localhost:1163/NewProject/subject/test-subject-1.aspx?ID=1
    //when you want to get it
    if(Request.QueryString["ID"] != null)
{
    string id=Request.QueryString["Request"].ToString();
}

Posted 26-May-11 1:14am

anvas kuttan

Comments

#realJSOP 26-May-11 7:44am

Look at his question again - he doesn't have a query string - he just has a URL.

anvas kuttan 26-May-11 7:51am

ya that's why i put a query string first... ;)