March 25th, 2008 admin
I was trying to find any classes allowing easily modify querystring. I have found a couple of good ones but not ideal for me. So I have created my own class. It has a number of static functions which could be called without creating an instance of the class - if you need to use some basic stuff. Here it is:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Collections;
using System.Collections.Specialized;
namespace ClassLibrary
{
public class QueryStringBuilder
{
protected NameValueCollection m_QueryString;
public QueryStringBuilder(NameValueCollection nvcQueryString)
{
m_QueryString = new NameValueCollection(nvcQueryString);
}
// static function returning a new querystring with a new parameter
public static NameValueCollection QSWithParameter(NameValueCollection nvcCurrentQS,
string strParameterName, string strParameterValue)
{
NameValueCollection nvcQS = new NameValueCollection(nvcCurrentQS);
for (int i = 0; i < nvcQS.Count; i++)
{
if (nvcQS.GetKey(i) == null)
{
nvcQS.Remove(null);
break;
}
}
if (nvcQS.GetValues(strParameterName) == null)
nvcQS.Add(strParameterName, strParameterValue);
else
nvcQS[strParameterName] = strParameterValue;
return nvcQS;
}
// function returning a new querystring with a new parameter
public NameValueCollection QSWithParameter(string strParameterName, string strParameterValue)
{
return QSWithParameter(m_QueryString, strParameterName, strParameterValue);
}
// static function returning a querystring without a parameter
public static NameValueCollection QSWithoutParameter(NameValueCollection nvcCurrentQS,
string strParameterName)
{
NameValueCollection nvcQS = new NameValueCollection(nvcCurrentQS);
if (nvcQS.GetValues(strParameterName) != null)
nvcQS.Remove(strParameterName);
return nvcQS;
}
// function returning a querystring without a parameter
public NameValueCollection QSWithoutParameter(string strParameterName)
{
return QSWithoutParameter(m_QueryString, strParameterName);
}
// static function returning url with a querystring
public static string UrlWithQueryString(NameValueCollection nvcQueryString, string strUrl)
{
int nQS = strUrl.IndexOf("?");
if (nQS > -1)
strUrl = strUrl.Substring(0, nQS);
if (nvcQueryString.Count > 0)
{
for (int i = 0; i < nvcQueryString.Count; i++)
{
strUrl += String.Format("{0}{1}={2}", i == 0 ? "?" : "&", nvcQueryString.Keys[i],
nvcQueryString[i]);
}
}
return strUrl;
}
// static function returning RawUrl with a querystring
public static string UrlWithQueryString(NameValueCollection nvcQueryString)
{
return UrlWithQueryString(nvcQueryString, HttpContext.Current.Request.RawUrl);
}
// function returning url with a current querystring
public string UrlWithQueryString(string strUrl)
{
return UrlWithQueryString(m_QueryString, strUrl);
}
// function returning RawUrl with a current querystring
public string UrlWithQueryString()
{
return UrlWithQueryString(m_QueryString);
}
// procedure removing a parameter from a current querystring
public void RemoveQSParameter(string strParameterName)
{
m_QueryString = QSWithoutParameter(strParameterName);
}
// procedure adding a parameter to a current querystring
public void SetQSParameter(string strParameterName, string strParameterValue)
{
m_QueryString = QSWithParameter(strParameterName, strParameterValue);
}
}
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