diff --git a/Lib.Web.Mvc/JQuery/JqGrid/JqGridHelper.cs b/Lib.Web.Mvc/JQuery/JqGrid/JqGridHelper.cs
index 4cb8404..52de080 100644
--- a/Lib.Web.Mvc/JQuery/JqGrid/JqGridHelper.cs
+++ b/Lib.Web.Mvc/JQuery/JqGrid/JqGridHelper.cs
@@ -786,7 +786,12 @@ private void AppendOptions(ref StringBuilder javaScriptBuilder)
             if (_options.UseDataString())
                 javaScriptBuilder.AppendFormat("datastr: '{0}',", _options.DataString).AppendLine();
             else if (_asSubgrid)
-                javaScriptBuilder.AppendFormat("url: '{0}?id=' + rowId,", _options.Url).AppendLine();
+            {
+                if (_options.Url.Contains("?"))
+                    javaScriptBuilder.AppendFormat("url: '{0}&id=' + rowId,", _options.Url).AppendLine();
+                else
+                    javaScriptBuilder.AppendFormat("url: '{0}?id=' + rowId,", _options.Url).AppendLine();
+            }
             else
                 javaScriptBuilder.AppendFormat("url: '{0}',", _options.Url).AppendLine();