How to update querystring in C#?
To modify an existing QueryString value use this approach:
var nameValues = HttpUtility.ParseQueryString(Request.QueryString.ToString());nameValues.Set("sortBy", "4");string url = Request.Url.AbsolutePath;Response.Redirect(url + "?" + nameValues); // ToString() is called implicitlyI go into more detail in another response.
Retrieve the querystring of sortby, then perform string replace on the full Url as follow:
string sUrl = *retrieve the required complete url*string sCurrentValue = Request.QueryString["sortby"];sUrl = sUrl.Replace("&sortby=" + sCurrentValue, "&sortby=" + newvalue);Let me know how it goes :)
Good luck
private void UpdateQueryString(string queryString, string value) { PropertyInfo isreadonly = typeof(System.Collections.Specialized.NameValueCollection).GetProperty("IsReadOnly", BindingFlags.Instance | BindingFlags.NonPublic); isreadonly.SetValue(this.Request.QueryString, false, null); this.Request.QueryString.Set(queryString, value); isreadonly.SetValue(this.Request.QueryString, true, null); }