How to get URL and QueryString value in an ASP.NET page
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Introduction
Generally we pass the querystring values from ASPX page to ASPX pages in .NET. We can also pass the value through ASP pages. Now the question is how to get the URL and querystring value in the ASP page.
QueryString
To get the querystring value in ASP page we can use the following code with in the server tag.
For a given URL like "http://www.mytestserver123.com/admin/ViewUserDetails.asp?userID=123"the above statement will result as "userID=123".
URL
To get the base URL we can use:
For a given URL like "http://www.mytestserver123.com/admin/ViewUserDetails.asp?userID=123"the above statement will result as "http://www.mytestserver123.com".
Any physical path between URL and QueryString
To get the Physical path if any, between base URL and QueryString we can get by:
For a given URL like "www.mytestserver123.com/admin/ViewUserDetails.asp?userID=123"the above statement will result as "/admin/ViewUserDetails.asp".
To get the whole URL we need to concatenate the above 3. Get the three in separate variables and then concatenate them all in "URL + PATH_INFO + QUERY_STRING". This will result in the whole URL.
There are many more thing we can get from the URL. They are as follows:
Variable
Description
Returns all HTTP headers sent by the client. Always prefixed with HTTP_ and capitalized
Returns all headers in raw form
Returns the meta base path for the application for the ISAPI DLL
Returns the physical path corresponding to the meta base path
Returns the value entered in the client's authentication dialog
The authentication method that the server uses to validate users
Returns the raw authenticated user name
Returns the unique ID for client certificate as a string
bit0 is set to 1 if the client certificate is present and bit1 is set to 1 if the Certification authority of the client certificate is not valid
Returns the issuer field of the client certificate
Returns the number of bits in Secure Sockets Layer connection key size
Returns the number of bits in server certificate private key
Returns the serial number field of the client certificate
Returns the issuer field of the server certificate
Returns the subject field of the server certificate
Returns the subject field of the client certificate
Returns the length of the content as sent by the client
Returns the data type of the content
Returns the revision of the CGI specification used by the server
Returns the value stored in the header HeaderName
Returns the value of the Accept header
Returns a string describing the language to use for displaying content
Returns the cookie string included with the request
Returns a string containing the URL of the page that referred the request to the current page using an tag. If the page is redirected, HTTP_REFERER is empty HTTP_USER_AGENT Returns a string describing the browser that sent the request HTTPS Returns ON if the request came in through secure channel or OFF if the request came in through a non-secure channel HTTPS_KEYSIZE Returns the number of bits in Secure Sockets Layer connection key size HTTPS_SECRETKEYSIZE Returns the number of bits in server certificate private key HTTPS_SERVER_ISSUER Returns the issuer field of the server certificate HTTPS_SERVER_SUBJECT Returns the subject field of the server certificate INSTANCE_ID The ID for the IIS instance in text format INSTANCE_META_PATH The meta base path for the instance of IIS that responds to the request LOCAL_ADDR Returns the server address on which the request came in LOGON_USER Returns the Windows account that the user is logged into PATH_INFO Returns extra path information as given by the client PATH_TRANSLATED A translated version of PATH_INFO that takes the path and performs any necessary virtual-to-physical mapping QUERY_STRING Returns the query information stored in the string following the question mark (?) in the HTTP request REMOTE_ADDR Returns the IP address of the remote host making the request REMOTE_HOST Returns the name of the host making the request REMOTE_USER Returns an unmapped user-name string sent in by the user REQUEST_METHOD Returns the method used to make the request SCRIPT_NAME Returns a virtual path to the script being executed SERVER_NAME Returns the server's host name, DNS alias, or IP address as it would appear in self-referencing URLs SERVER_PORT Returns the port number to which the request was sent SERVER_PORT_SECURE Returns a string that contains 0 or 1. If the request is being handled on the secure port, it will be 1. Otherwise, it will be 0 SERVER_PROTOCOL Returns the name and revision of the request information protocol SERVER_SOFTWARE Returns the name and version of the server software that answers the request and runs the gateway URL Returns the base portion of the URL This above table contains the variables and its descriptions for the result to be produced. Here is a change to learn something different. Let's grab this out. License This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)
Generally we pass the querystring values from ASPX page to ASPX pages in .NET. We can also pass the value through ASP pages. Now the question is how to get the URL and querystring value in the ASP page.
QueryString
To get the querystring value in ASP page we can use the following code with in the server tag.
Request.ServerVariables("QUERY_STRING")For a given URL like "http://www.mytestserver123.com/admin/ViewUserDetails.asp?userID=123"the above statement will result as "userID=123".
URL
To get the base URL we can use:
Request.ServerVariables("URL")For a given URL like "http://www.mytestserver123.com/admin/ViewUserDetails.asp?userID=123"the above statement will result as "http://www.mytestserver123.com".
Any physical path between URL and QueryString
To get the Physical path if any, between base URL and QueryString we can get by:
Request.ServerVariables("PATH_INFO")For a given URL like "www.mytestserver123.com/admin/ViewUserDetails.asp?userID=123"the above statement will result as "/admin/ViewUserDetails.asp".
To get the whole URL we need to concatenate the above 3. Get the three in separate variables and then concatenate them all in "URL + PATH_INFO + QUERY_STRING". This will result in the whole URL.
There are many more thing we can get from the URL. They are as follows:
Variable
Description
ALL_HTTP Returns all HTTP headers sent by the client. Always prefixed with HTTP_ and capitalized
ALL_RAW Returns all headers in raw form
APPL_MD_PATH Returns the meta base path for the application for the ISAPI DLL
APPL_PHYSICAL_PATH Returns the physical path corresponding to the meta base path
AUTH_PASSWORD Returns the value entered in the client's authentication dialog
AUTH_TYPE The authentication method that the server uses to validate users
AUTH_USER Returns the raw authenticated user name
CERT_COOKIE Returns the unique ID for client certificate as a string
CERT_FLAGS bit0 is set to 1 if the client certificate is present and bit1 is set to 1 if the Certification authority of the client certificate is not valid
CERT_ISSUER Returns the issuer field of the client certificate
CERT_KEYSIZE Returns the number of bits in Secure Sockets Layer connection key size
CERT_SECRETKEYSIZE Returns the number of bits in server certificate private key
CERT_SERIALNUMBER Returns the serial number field of the client certificate
CERT_SERVER_ISSUER Returns the issuer field of the server certificate
CERT_SERVER_SUBJECT Returns the subject field of the server certificate
CERT_SUBJECT Returns the subject field of the client certificate
CONTENT_LENGTH Returns the length of the content as sent by the client
CONTENT_TYPE Returns the data type of the content
GATEWAY_INTERFACE Returns the revision of the CGI specification used by the server
HTTP_<HeaderName> Returns the value stored in the header HeaderName
HTTP_ACCEPT Returns the value of the Accept header
HTTP_ACCEPT_LANGUAGE Returns a string describing the language to use for displaying content
HTTP_COOKIE Returns the cookie string included with the request
HTTP_REFERER Returns a string containing the URL of the page that referred the request to the current page using an tag. If the page is redirected, HTTP_REFERER is empty HTTP_USER_AGENT Returns a string describing the browser that sent the request HTTPS Returns ON if the request came in through secure channel or OFF if the request came in through a non-secure channel HTTPS_KEYSIZE Returns the number of bits in Secure Sockets Layer connection key size HTTPS_SECRETKEYSIZE Returns the number of bits in server certificate private key HTTPS_SERVER_ISSUER Returns the issuer field of the server certificate HTTPS_SERVER_SUBJECT Returns the subject field of the server certificate INSTANCE_ID The ID for the IIS instance in text format INSTANCE_META_PATH The meta base path for the instance of IIS that responds to the request LOCAL_ADDR Returns the server address on which the request came in LOGON_USER Returns the Windows account that the user is logged into PATH_INFO Returns extra path information as given by the client PATH_TRANSLATED A translated version of PATH_INFO that takes the path and performs any necessary virtual-to-physical mapping QUERY_STRING Returns the query information stored in the string following the question mark (?) in the HTTP request REMOTE_ADDR Returns the IP address of the remote host making the request REMOTE_HOST Returns the name of the host making the request REMOTE_USER Returns an unmapped user-name string sent in by the user REQUEST_METHOD Returns the method used to make the request SCRIPT_NAME Returns a virtual path to the script being executed SERVER_NAME Returns the server's host name, DNS alias, or IP address as it would appear in self-referencing URLs SERVER_PORT Returns the port number to which the request was sent SERVER_PORT_SECURE Returns a string that contains 0 or 1. If the request is being handled on the secure port, it will be 1. Otherwise, it will be 0 SERVER_PROTOCOL Returns the name and revision of the request information protocol SERVER_SOFTWARE Returns the name and version of the server software that answers the request and runs the gateway URL Returns the base portion of the URL This above table contains the variables and its descriptions for the result to be produced. Here is a change to learn something different. Let's grab this out. License This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)