Return ID from URL

[dba123]

what's the best way to check the incoming URL for an IDand return the ID
possible examples of incoming URLs:
/somedirectory/4/somepage.aspx
/somedirectory/4.aspx
// Check requested URL for ID value, if so return it
public String GetRecipeURLID( string URL)
{
//somehow check for a number here and return the number
HttpContext.Cur rent.Request.Pa th

}

[Peter Bromberg [C# MVP]]

This is very simplistic, untested code, but you should get the idea:

Match m=Regex.Match(R equest.Url.Abso lutePath, "[0-9]");
if (m.Length 0)
Response.Write( "found" + m.Value);

Peter

--
Co-founder, Eggheadcafe.com developer portal:
http://www.eggheadcafe.com
UnBlog:
http://petesbloggerama.blogspot.com


"dba123" wrote:

what's the best way to check the incoming URL for an IDand return the ID
possible examples of incoming URLs:
/somedirectory/4/somepage.aspx
/somedirectory/4.aspx
// Check requested URL for ID value, if so return it
public String GetRecipeURLID( string URL)
{
//somehow check for a number here and return the number
HttpContext.Cur rent.Request.Pa th

}

[Jesse Houwing]

* dba123 wrote, On 3-8-2006 22:03:

what's the best way to check the incoming URL for an IDand return the ID
possible examples of incoming URLs:
/somedirectory/4/somepage.aspx
/somedirectory/4.aspx
// Check requested URL for ID value, if so return it
public String GetRecipeURLID( string URL)
{
//somehow check for a number here and return the number
HttpContext.Cur rent.Request.Pa th

}

Are these the only possible urls?

Then you could use a regex:
(?<=somedirecto ry/)\d+(?=(?:/somepage)?\.asp x)

Or if the somepage/somedirectory part is random:
(?<=\w+/)\d+(?=(?:/\w+)?\.aspx)

// Check requested URL for ID value, if so return it
public String GetRecipeURLID( )
{
string path = HttpContext.Cur rent.Request.Pa th;
Match m = Regex.Match(pat h, @"(?<=\w+/)\d+(?=(?:/\w+)?\.aspx)");
if (m.Success)
{
string numericPart = m.Value;
return int.Parse(numer icPart);
}
return -1;
}
Jesse Houwing

[dba123]

I'm using this in a class file.

Match m=Regex.Match(R equest.Url.Abso lutePath, "[0-9]");

Error The name 'Request' does not exist in the current context

dba123
"Peter Bromberg [C# MVP]" wrote:

This is very simplistic, untested code, but you should get the idea:

Match m=Regex.Match(R equest.Url.Abso lutePath, "[0-9]");
if (m.Length 0)
Response.Write( "found" + m.Value);

Peter

--
Co-founder, Eggheadcafe.com developer portal:
http://www.eggheadcafe.com
UnBlog:
http://petesbloggerama.blogspot.com


"dba123" wrote:

what's the best way to check the incoming URL for an IDand return the ID
possible examples of incoming URLs:
/somedirectory/4/somepage.aspx
/somedirectory/4.aspx
// Check requested URL for ID value, if so return it
public String GetRecipeURLID( string URL)
{
//somehow check for a number here and return the number
HttpContext.Cur rent.Request.Pa th

}

[dba123]

Thanks Jesse, will try that!

What about this:

if (HttpContext.Cu rrent.Request.P ath.Length 0)
return
System.Text.Reg ularExpressions .RegEx.Replace( HttpContext.Cur rent.Request.Pa th, "[0-9]", "");
else
return -1;

what does the -1 tell you in the return to the calling method and what does
it do, stop the calling method if -1 is returned from the called method?--
dba123
"Jesse Houwing" wrote:

* dba123 wrote, On 3-8-2006 22:03:

what's the best way to check the incoming URL for an IDand return the ID
possible examples of incoming URLs:
/somedirectory/4/somepage.aspx
/somedirectory/4.aspx
// Check requested URL for ID value, if so return it
public String GetRecipeURLID( string URL)
{
//somehow check for a number here and return the number
HttpContext.Cur rent.Request.Pa th

}

Are these the only possible urls?

Then you could use a regex:
(?<=somedirecto ry/)\d+(?=(?:/somepage)?\.asp x)

Or if the somepage/somedirectory part is random:
(?<=\w+/)\d+(?=(?:/\w+)?\.aspx)

// Check requested URL for ID value, if so return it
public String GetRecipeURLID( )
{
string path = HttpContext.Cur rent.Request.Pa th;
Match m = Regex.Match(pat h, @"(?<=\w+/)\d+(?=(?:/\w+)?\.aspx)");
if (m.Success)
{
string numericPart = m.Value;
return int.Parse(numer icPart);
}
return -1;
}
Jesse Houwing

[dba123]

I want to return the number as a string still, not an integer:

string path = HttpContext.Cur rent.Request.Pa th;
Match m = Regex.Match(pat h,
@"(?<=\w+/)\d+(?=(?:/\w+)?\.aspx)");
if (m.Success)
{
return m.Value;
}
return -1;

public string GetRewrittenURL (string URL) {

GetFormattedRec ipeDetailURL(UR L);
....

}

Error:
--
dba123
"Jesse Houwing" wrote:

* dba123 wrote, On 3-8-2006 22:03:

what's the best way to check the incoming URL for an IDand return the ID
possible examples of incoming URLs:
/somedirectory/4/somepage.aspx
/somedirectory/4.aspx
// Check requested URL for ID value, if so return it
public String GetRecipeURLID( string URL)
{
//somehow check for a number here and return the number
HttpContext.Cur rent.Request.Pa th

}

Are these the only possible urls?

Then you could use a regex:
(?<=somedirecto ry/)\d+(?=(?:/somepage)?\.asp x)

Or if the somepage/somedirectory part is random:
(?<=\w+/)\d+(?=(?:/\w+)?\.aspx)

// Check requested URL for ID value, if so return it
public String GetRecipeURLID( )
{
string path = HttpContext.Cur rent.Request.Pa th;
Match m = Regex.Match(pat h, @"(?<=\w+/)\d+(?=(?:/\w+)?\.aspx)");
if (m.Success)
{
string numericPart = m.Value;
return int.Parse(numer icPart);
}
return -1;
}
Jesse Houwing

[Jesse Houwing]

* dba123 wrote, On 3-8-2006 23:32:

Thanks Jesse, will try that!

What about this:

if (HttpContext.Cu rrent.Request.P ath.Length 0)
return
System.Text.Reg ularExpressions .RegEx.Replace( HttpContext.Cur rent.Request.Pa th, "[0-9]", "");

This will strip all the numbers from the url, that is now what you wanted.

else
return -1;

what does the -1 tell you in the return to the calling method and what does
it do, stop the calling method if -1 is returned from the called method?--
dba123

You'll need a way to communicate if a number was found in the string. I
choose -1, as it is an unlikely number and can easily tested against.

Jesse

>

"Jesse Houwing" wrote:

>* dba123 wrote, On 3-8-2006 22:03:

>>what's the best way to check the incoming URL for an IDand return the ID
possible examples of incoming URLs:
/somedirectory/4/somepage.aspx
/somedirectory/4.aspx
// Check requested URL for ID value, if so return it
public String GetRecipeURLID( string URL)
{
//somehow check for a number here and return the number
HttpContext.Cur rent.Request.Pa th

}

Are these the only possible urls?

Then you could use a regex:
(?<=somedirect ory/)\d+(?=(?:/somepage)?\.asp x)

Or if the somepage/somedirectory part is random:
(?<=\w+/)\d+(?=(?:/\w+)?\.aspx)

// Check requested URL for ID value, if so return it
public String GetRecipeURLID( )
{
string path = HttpContext.Cur rent.Request.Pa th;
Match m = Regex.Match(pat h, @"(?<=\w+/)\d+(?=(?:/\w+)?\.aspx)");
if (m.Success)
{
string numericPart = m.Value;
return int.Parse(numer icPart);
}
return -1;
}
Jesse Houwing

[Jesse Houwing]

* dba123 wrote, On 3-8-2006 23:36:

I want to return the number as a string still, not an integer:

string path = HttpContext.Cur rent.Request.Pa th;
Match m = Regex.Match(pat h,
@"(?<=\w+/)\d+(?=(?:/\w+)?\.aspx)");
if (m.Success)
{
return m.Value;
}
return stri;

public string GetRewrittenURL (string URL) {

GetFormattedRec ipeDetailURL(UR L);
...

}

Error:

Try this:

string path = HttpContext.Cur rent.Request.Pa th;
Match m = Regex.Match(pat h, @"(?<=\w+/)\d+(?=(?:/\w+)?\.aspx)");
if (m.Success)
{
return m.Value;
}
else
{
return string.empty;
}
It returns either the number found in the url, or string empty.

Note that the regex I've written is quite strict and should only find
numbers in urls that are similar to the formats you had sent. Please
make sure it does what you need by testing a few samples.

Jesse

[Nicholas Paldino [.NET/C# MVP]]

With all due respect to the other posters here, using Regex is overkill
for this.

I would recommend passing the URL to the Split method on the string
class, passing the "/" character to split the directories. Then, all you
have to do is check the appropriate element for the id (assuming it is in
the same place in the URL every time). Then, you can pass the string to the
static Parse method on Int32 to get an integer.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"dba123" <db****@discuss ions.microsoft. comwrote in message
news:8F******** *************** ***********@mic rosoft.com...

what's the best way to check the incoming URL for an IDand return the ID
possible examples of incoming URLs:
/somedirectory/4/somepage.aspx
/somedirectory/4.aspx
// Check requested URL for ID value, if so return it
public String GetRecipeURLID( string URL)
{
//somehow check for a number here and return the number
HttpContext.Cur rent.Request.Pa th

}

[Jesse Houwing]

* Nicholas Paldino [.NET/C# MVP] wrote, On 4-8-2006 5:45:

With all due respect to the other posters here, using Regex is overkill
for this.

I would recommend passing the URL to the Split method on the string
class, passing the "/" character to split the directories. Then, all you
have to do is check the appropriate element for the id (assuming it is in
the same place in the URL every time). Then, you can pass the string to the
static Parse method on Int32 to get an integer.

Hope this helps.

From the origina post I read that there are multiple formats, some of
which don't have the number as a directory, some of which have. In order
to support all these formats you'll have to do a lot of splits and checks.

That's why I preferred the regex.

Jesse