how ser querystring parameter in c#?

Hi,

While you post a question please be given proper information.
I think your asking the query string values.

please read the follwing links for better understading about the query string.

Passing variables between pages using QueryString[^]
http://msdn.microsoft.com/en-us/library/6c3yckfw(v=vs.100).aspx[^]
http://www.dotnetperls.com/querystring[^]
http://www.aspdotnet-suresh.com/2012/10/aspnet-pass-multiple-parameters-in.html[^]

please check with this links , this links might be help for you...

the query string can be passed by using the following format

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        String id="123";
        String name = "hello";

        Response.Redirect("Default2.aspx?id="+id+"&name="+name);
    }
}

don't allow spaces between '&' symbol and other parameter
you can use this inside buttonclick function or any other function

To retrive the value of the query string in next page use the following in page load

public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string m = Request.QueryString["id"].ToString();
        string n = Request.QueryString["name"].ToString();
        Response.Write(m + " " + n);
    }
}

Hi User/Guest,

Please Explain your Exact Requirement of QueryString. So I Can Provide Best Answer for your Requirement. Basically QueryString use in Get Method of Http For Sending Small Amount of Data to the Server and With Public Visibility.
So In General Way,

Eg.of Query String :

Response.Redirect("Default2.aspx?id="+id+"&name="+name);


In This Example You are Requested Web Page 'Default2.aspx' from Server.
? :- Denote that URL contain the Query String.
After '?' You Add Value Pair just like Name=Rahul

and you separate your multiple value pair by & Sign by Ending Each Value Pair.
Just Like in Example
id : Variable Name,
+ : Concatenate with URL and variable,
& : Multiple Value pair in the URL.

Full Example : Response.Redirect("Default2.aspx?ID=437&Name=Rahul Kumar&ContactNo=7428323290");

So You Can Add Multiple Value-Pair in URL by Separating with '&' Sign.

protected internal T ParseQueryStringValue<T>(string key, string value)
  {
      if (!string.IsNullOrEmpty(value))
      {
          //TODO: Map other common QueryString parameters type ...
          if (typeof(T) == typeof(string))
          {
              return (T)Convert.ChangeType(value, typeof(T));
          }
          if (typeof(T) == typeof(int))
          {
              int tempValue;
              if (!int.TryParse(value, out tempValue))
              {
                  throw new ApplicationException(string.Format("Invalid QueryString parameter {0}. The value " +
                                                            "'{1}' is not a valid {2} type.", key, value, "int"));
              }
              return (T)Convert.ChangeType(tempValue, typeof(T));
          }
          if (typeof(T) == typeof(DateTime))
          {
              DateTime tempValue;
              if (!DateTime.TryParse(value, out tempValue))
              {
                  throw new ApplicationException(string.Format("Invalid QueryString parameter {0}. The value " +
                                                       "'{1}' is not a valid {2} type.", key, value, "DateTime"));
              }
              return (T)Convert.ChangeType(tempValue, typeof(T));
          }
      }
      return default(T);
  }