I have created a simple application having 3 user controls as
<%@
Control Language="C#" AutoEventWireup="true"
CodeFile="WebUserControl2.ascx.cs"
Inherits="UserControl_WebUserControl2" %>
<%@ Reference Control="~/UserControl/WebUserControl3.ascx" %>
<asp:Button ID="Next2" runat="server" Text="Next2" onclick="Next2_Click" />
<%@
Control Language="C#" AutoEventWireup="true"
CodeFile="WebUserControl3.ascx.cs"
Inherits="UserControl_WebUserControl3" %>
<asp:Button ID="Next3" runat="server" Text="Next3" onclick="Next3_Click" />
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class UserControl_WebUserControl3 : System.Web.UI.UserControl
{
public event EventHandler Next3Click;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Next3_Click(object sender, EventArgs e)
{
Next3Click(sender, e);
}
}
Finally This is my DynamicUserControl.aspx:-
- WebUserControl1.ascx
- WebUserControl2.ascx
- WebUserControl3.ascx
- DynamicUserControl.aspx
Here is my First WebUsercontrol1.ascx Code:-
<%@
Control Language="C#" AutoEventWireup="true"
CodeFile="WebUserControl1.ascx.cs"
Inherits="UserControl_WebUserControl1" %>
<%@ Reference Control="~/UserControl/WebUserControl2.ascx" %>
<asp:Button ID="Next1" runat="server" Text="Next" onclick="Next1_Click" />
WebUsercontrol1.ascx.cs Code:-
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class UserControl_WebUserControl1 : System.Web.UI.UserControl
{
public event EventHandler Next1Click;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Next1_Click(object sender, EventArgs e)
{
Session["test"] = "2";
Next1Click(sender, e);
UserControl_WebUserControl2 ucSimpleControl =
(UserControl_WebUserControl2)LoadControl("~/UserControl/WebUserControl2.ascx");
PlaceHolder phContactDetails = (PlaceHolder)Page.FindControl("ControlHolder");
phContactDetails.Controls.Clear();
phContactDetails.Controls.Add(ucSimpleControl);
ucSimpleControl.Next2Click += new EventHandler(ucSimpleControl_Next2Click);
}
protected void ucSimpleControl_Next2Click(object sender, EventArgs e)
{
Response.Write("It's working");
}
}
Here is my second WebUsercontrol2.ascx Code:-
<%@ Reference Control="~/UserControl/WebUserControl3.ascx" %>
<asp:Button ID="Next2" runat="server" Text="Next2" onclick="Next2_Click" />
WebUsercontrol2.ascx.cs Code:-
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class UserControl_WebUserControl2 : System.Web.UI.UserControl
{
public event EventHandler Next2Click;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Next2_Click(object sender, EventArgs e)
{
Session["test"] = "3";
Next2Click(sender, e);
UserControl_WebUserControl3 ucSimpleControl =
(UserControl_WebUserControl3)LoadControl("~/UserControl/WebUserControl3.ascx");
PlaceHolder phContactDetails = (PlaceHolder)Page.FindControl("ControlHolder");
phContactDetails.Controls.Clear();
phContactDetails.Controls.Add(ucSimpleControl);
ucSimpleControl.Next3Click += new EventHandler(ucSimpleControl_Next3Click);
}
protected void ucSimpleControl_Next3Click(object sender, EventArgs e)
{
Response.Write("It's working");
}
}
Here is my Third WebUsercontrol3.ascx Code:-
<asp:Button ID="Next3" runat="server" Text="Next3" onclick="Next3_Click" />
WebUsercontrol3.ascx.cs Code:-
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class UserControl_WebUserControl3 : System.Web.UI.UserControl
{
public event EventHandler Next3Click;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Next3_Click(object sender, EventArgs e)
{
Next3Click(sender, e);
}
}
Finally This is my DynamicUserControl.aspx:-
Source Code:-
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="DynamicUserControl.aspx.cs" Inherits="DynamicUserControl" %>
<%@ Reference Control="~/UserControl/WebUserControl1.ascx" %>
<%@ Reference Control="~/UserControl/WebUserControl2.ascx" %>
<%@ Reference Control="~/UserControl/WebUserControl3.ascx" %>
<%@ Register Src="~/UserControl/WebUserControl1.ascx" TagName="FirstControl" TagPrefix="gis" %>
<!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></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:PlaceHolder ID="ControlHolder" runat="server"></asp:PlaceHolder>
<br />
</div>
<asp:HiddenField ID="hf" runat="server" />
</form>
</body>
</html>
My Code Behind:-
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class DynamicUserControl : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Session["test"] = null;
}
int id = 1;
int i=0;
if (Session["test"] != null)
{
id = int.Parse(Session["test"].ToString());
}
if (Session["test"] == null)
{
UserControl_WebUserControl1 ucSimpleControl =
(UserControl_WebUserControl1)LoadControl("~/UserControl/WebUserControl" +
id + ".ascx");
ControlHolder.Controls.Clear();
ControlHolder.Controls.Add(ucSimpleControl);
ucSimpleControl.Next1Click += new EventHandler(ucSimpleControl_Next1Click);
}
if (id == 2)
{
UserControl_WebUserControl2 ucSimpleControl = null;
ucSimpleControl = (UserControl_WebUserControl2)LoadControl("~/UserControl/WebUserControl" + id + ".ascx");
ControlHolder.Controls.Clear();
for (i = 1; i <= id; i++)
{
ControlHolder.Controls.Add(ucSimpleControl);
}
ucSimpleControl.Next2Click += new EventHandler(ucSimpleControl_Next2Click);
}
if (id == 3)
{
UserControl_WebUserControl3 ucSimpleControl=null;
ucSimpleControl = (UserControl_WebUserControl3)LoadControl("~/UserControl/WebUserControl" + id + ".ascx");
ControlHolder.Controls.Clear();
for (i = 1; i <= id; i++)
{
ControlHolder.Controls.Add(ucSimpleControl);
}
ucSimpleControl.Next3Click += new EventHandler(ucSimpleControl_Next3Click);
}
}
protected void ucSimpleControl_Next1Click(object sender, EventArgs e)
{
Response.Write("The First usercontrol working fine");
}
protected void ucSimpleControl_Next2Click(object sender, EventArgs e)
{
Response.Write("The Second usercontrol working fine");
}
protected void ucSimpleControl_Next3Click(object sender, EventArgs e)
{
Response.Write("The Third usercontrol working fine");
}
}
The Screen Shot of my Folder and user control is :
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