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[CLOSED] Calling a UserControl Direct Event method from a different page

  1. #1
    Mar 11, 2011, 2:02 PM

    [CLOSED] Calling a UserControl Direct Event method from a different page

    We are calling theusercontrol's direct event method from a different cs file. However we cannot assign a Session Value on the direct event method.
    Please look at the code.
    //This is the cs file calling the usercontrol

 Ext.Net.Button btnSee = ((Ext.Net.Button)ucGrid1.getGrid.BottomBar[0].Items[0]);
            btnSee.DirectClick += new UserControl_VPNSurec().seePDFForm;
            btnSee.DirectEvents.Click.ExtraParams.Add(new Ext.Net.Parameter { Name = "Values", Value = "Ext.encode(#{Grid1}.getRowsValues({selectedOnly : false}))", Mode = ParameterMode.Raw });
    //This is the code behing on user control page

public void seePDFForm(object sender, DirectEventArgs e)
    {
        string json = e.ExtraParams["Values"];
        Dictionary<string, string>[] selectedVal = JSON.Deserialize<Dictionary<string, string>[]>(json);
        int formid = Convert.ToInt32((selectedVal[0]["formid"]).ToString());
        Session[SystemVariables.VPN_FORM_ID] = formid;   //The program fails here error is Session is NULL - Null reference exception
 

    }
    Last edited by Daniil; Mar 15, 2011 at 7:54 AM. Reason: [CLOSED]
  2. #2
    Mar 11, 2011, 2:54 PM
    Hi,

    It's required to add a user control in controls collection, like this:
    Work.TestUC uc = new Work.TestUC();
this.Form.Controls.Add(uc);
    Here is a full example:

    Example Page
    <%@ Page Language="C#" %>

<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>
<%@ Import Namespace="Work" %>

<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
Work.TestUC uc = new Work.TestUC();
this.Form.Controls.Add(uc);

        Ext.Net.Button btnSee = new Ext.Net.Button()
        {
            Text = "Click me",
        };
        btnSee.DirectClick += uc.seePDFForm;
        
        this.Form.Controls.Add(btnSee);

        this.Session["test"] = "Hello World!";
    }
</script>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Ext.Net Example</title>
</head>
<body>
    <form runat="server">
    <ext:ResourceManager runat="server" />
    </form>
</body>
</html>
    Example User Control
    <%@ Control 
    Language="C#" 
    CodeBehind="TestUC.ascx.cs" 
    Inherits="Work.TestUC" %>

using Ext.Net;

namespace Work
{
    public partial class TestUC : System.Web.UI.UserControl
    {
        public void TestDirectHandler(object sender, DirectEventArgs e)
        {
            X.Msg.Alert("DirectEvent", this.Session["test"]).Show();
        }
    }
}

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