Load UserControl With Reflection
Categories: UserControls, UserControls Switching
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Tags: Developers, 1. Beginner, 2. Intermediate, Pre v6.3, v6.3, v6.4 and Later, 3. Advanced
Revision:
1
Posted:
18/Nov/2009
Updated:
23/July/2010
Status:
Publish
Types: Article
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This article will have a few sections added to it soon, based on the following article type skeleton: CodeSampleThis article explains how to load a UserControl to a Visual WebGui application in run-time from an assembly that is not referenced in your project.The way this is done in .NET is with Reflection. Code samplesC# Code
string strBaseDir = AppDomain.CurrentDomain.BaseDirectory;
string strSlnDir = strBaseDir.Remove(AppDomain.CurrentDomain.BaseDirectory.LastIndexOf(@"\UserControlLoadInRunTime"));
string strPathToAsm = Path.Combine(strBaseDir, @"WebGUIControlLibrary\bin\Debug\WebGUIControlLibrary.dll");
try
{
Assembly objAsm = Assembly.LoadFile(strPathToAsm);
object objTemp = objAsm.CreateInstance("WebGUIControlLibrary.UserControl1");
Gizmox.WebGUI.Forms.UserControl objUserControl = objTemp as Gizmox.WebGUI.Forms.UserControl;
if (objUserControl != null)
{
this.Controls.Add(objUserControl);
}
}
catch(Exception objException)
{
// do something
}
Dim strBaseDir As String = AppDomain.CurrentDomain.BaseDirectory
Dim strSlnDir As String = strBaseDir.Remove(AppDomain.CurrentDomain.BaseDirectory.LastIndexOf("\UserControlLoadInRunTime"))
Dim strPathToAsm As String = Path.Combine(strBaseDir, "WebGUIControlLibrary\bin\Debug\WebGUIControlLibrary.dll")
Try
Dim objAsm As Assembly = Assembly.LoadFile(strPathToAsm)
Dim objTemp As Object = objAsm.CreateInstance("WebGUIControlLibrary.UserControl1")
Dim objUserControl As Gizmox.WebGUI.Forms.UserControl = TryCast(objTemp, Gizmox.WebGUI.Forms.UserControl)
If objUserControl IsNot Nothing Then
Me.Controls.Add(objUserControl)
End If
Catch objException As Exception
' do something
End Try
The demo application is supplied both in C# and VB.NET code for Visual Studio 2005 and 2008 and can be downloaded from  here
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