1、清理request的请求数据

PropertyInfo isreadonly =typeof(System.Collections.Specialized.NameValueCollection).GetProperty("IsReadOnly", BindingFlags.Instance | BindingFlags.NonPublic);

// make collection editable

isreadonly.SetValue(HttpContext.Current.Request.QueryString, false, null);

foreach (var key in HttpContext.Current.Request.QueryString.AllKeys)

{

HttpContext.Current.Request.QueryString.Set(key, HttpContext.Current.Request.QueryString[key].Split(',').First());

//HttpContext.Current.Request.QueryString[key] = HttpContext.Current.Request.QueryString[key].Split(',').First();

}

isreadonly.SetValue(HttpContext.Current.Request.QueryString, true, null);