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How to get parameter from url string in c#

Recently i have posted get parameter from url javascriptCheck/Uncheck all checkboxes of a gridview in javascriptHighlighting text inside div in JavaScript and now i am going to explain multiple ways to get parameter from url string or given query data in asp.net.

below is the function named GetQueryParameters, by passing Url String you can get the collection of query string, you can implement this function by two way given below



private NameValueCollection GetQueryParameters(string dataWithQuery)
{
 NameValueCollection result = new NameValueCollection();
 string[] parts = dataWithQuery.Split('?');
 if (parts.Length > 0)
 {
   string QueryParameter = parts.Length > 1 ? parts[1] : parts[0];
   if (!string.IsNullOrEmpty(QueryParameter))
   {
    string[] p = QueryParameter.Split('&');
    foreach (string s in p)
    {
        if (s.IndexOf('=') > -1)
        {
            string[] temp = s.Split('=');
            result.Add(temp[0], temp[1]);
        }
        else
        {
            result.Add(s, string.Empty);
        }
    }
   }
 }
 return result;
}

Or you can use inbuilt HttpUtility Method ParseQueryString.


private NameValueCollection GetQueryParameters(string dataWithQuery)
{
   return  HttpUtility.ParseQueryString(dataWithQuery);
}

Calling of get url parameter funtion.


string LinkUrl = "http://www.dotnetbull.com?post=linkparameter&month=app&day=sat";
//or string LinkUrl="post=linkparameter&month=app&day=sat";
NameValueCollection dtQueryString = GetQueryParameters(LinkUrl);
string month = dtQueryString["month"]; //app


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