System TipThis article applies to a different operating system than the one you are using. Article content that may not be relevant to you is disabled.
Consider the following scenario. In a Microsoft ASP.NET 2.0-based
application, a Web page contains a Microsoft Windows Forms user control
object. You use JavaScript to try to access the properties of this Windows Forms user control
object. In this scenario, you may not be able
to access the public property at run time. Additionally, you may receive the following
exception error message:
See the end of this message, instead of this
dialog box, for details on invoking just-in-time (JIT) debugging.
************** Exception Text **************
System.Security.SecurityException: Request for the permission of type
'System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.0.0,
Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. at
System.Windows.Forms.SafeNativeMethods.IFont.GetHFont() at
System.Windows.Forms.Control.ActiveXImpl.get_AmbientFont() at
System.Windows.Forms.Control.get_Font() at
System.Windows.Forms.Control.GetParentFont() at
System.Windows.Forms.Control.get_Font() at
System.Windows.Forms.ButtonInternal.ButtonBaseAdapter.CommonLayout() at
System.Windows.Forms.ButtonInternal.ButtonStandardAdapter.PaintWorker(PaintEventArgs
e, Boolean up, CheckState state) at
System.Windows.Forms.ButtonInternal.ButtonStandardAdapter.PaintUp(PaintEventArgs
e, CheckState state) at
System.Windows.Forms.ButtonInternal.ButtonStandardAdapter.PaintOver(PaintEventArgs
e, CheckState state) at
System.Windows.Forms.ButtonInternal.ButtonBaseAdapter.Paint(PaintEventArgs
pevent) at System.Windows.Forms.ButtonBase.OnPaint(PaintEventArgs pevent) at
System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16
layer, Boolean disposeEventArgs) at
System.Windows.Forms.Control.WmPaint(Message& m) at
System.Windows.Forms.Control.WndProc(Message& m) at
System.Windows.Forms.ButtonBase.WndProc(Message& m) at
System.Windows.Forms.Button.WndProc(Message& m) at
System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at
System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at
System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr
wparam, IntPtr lparam) The action that failed was: Demand The
type of the first permission that failed was:
System.Security.Permissions.SecurityPermission ************** Loaded
Assemblies ************** mscorlib Assembly Version: 2.0.0.0
Win32 Version: 2.0.50215.44 (beta2.050215-4400) CodeBase:
file:///C:/WINDOWS/Microsoft.NET/Framework/v2.0.50215/mscorlib.dll
---------------------------------------- System Assembly
Version: 2.0.0.0 Win32 Version: 2.0.50215.44 (beta2.050215-4400)
CodeBase:
file:///C:/WINDOWS/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
---------------------------------------- SmartClient Assembly
Version: 1.0.1928.26893 Win32 Version: n/a CodeBase:
http://localhost:1156/SmartClientTestWeb/SmartClient.dll
---------------------------------------- System.Windows.Forms
Assembly Version: 2.0.0.0 Win32 Version: 2.0.50215.44
(beta2.050215-4400) CodeBase:
file:///C:/WINDOWS/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
---------------------------------------- System.Drawing Assembly
Version: 2.0.0.0 Win32 Version: 2.0.50215.44 (beta2.050215-4400)
CodeBase:
file:///C:/WINDOWS/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
---------------------------------------- Microsoft.mshtml
Assembly Version: 7.0.3300.0 Win32 Version: 7.0.3300.0 CodeBase:
file:///C:/WINDOWS/assembly/GAC/Microsoft.mshtml/7.0.3300.0__b03f5f7f11d50a3a/Microsoft.mshtml.dll
---------------------------------------- ************** JIT Debugging
************** To enable just-in-time (JIT) debugging, the .config file
for this application or computer (machine.config) must have the jitDebugging
value set in the system.windows.forms section. The application must also be
compiled with debugging enabled. For example: <configuration>
<system.windows.forms jitDebugging="true" /> </configuration>
When JIT debugging is enabled, any unhandled exception will be sent to the
JIT debugger registered on the computer rather than be handled by this dialog
box.
Note This problem does not occur in the Microsoft .NET Framework
1.1.
On File menu, click Add,
and then click New Project.
In the Templates list, click Windows Control
Library.
In the Name box, type
SmartClient.
In the Location box, type
DriveLetter:\Path, and
then click OK.
In the code designer for
the UserControl1.Designer.cs file, replace the existing code with the
following code.
namespace SmartClient
{
partial class UserControl1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Component Designer generated code
/// <summary>
/// Required method for designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(7, 90);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(126, 23);
this.button1.TabIndex = 0;
this.button1.Text = "property Read";
this.button1.Click += new System.EventHandler(button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(146, 90);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(127, 23);
this.button2.TabIndex = 1;
this.button2.Text = "property Write";
this.button2.Click += new System.EventHandler(button2_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(22, 25);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(232, 21);
this.textBox1.TabIndex = 2;
//
// UserControl1
//
this.Controls.Add(this.textBox1);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Name = "UserControl1";
this.Size = new System.Drawing.Size(276, 123);
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.TextBox textBox1;
}
}
In Solution Explorer, right-click
UserControl1.cs, and then click View
Code.
Replace the existing application code with the following code.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
namespace SmartClient
{
public partial class UserControl1 : UserControl
{
public UserControl1()
{
InitializeComponent();
}
String TestProperty = "something";
void button2_Click(object sender, System.EventArgs e)
{
textBox1.Text = TestProperty;
}
void button1_Click(object sender, System.EventArgs e)
{
TestProperty = textBox1.Text;
}
}
}
On the Debug menu, click Start
Debugging.
Note After you click any button, you notice the problem that is mentioned in
the "Symptoms" section.
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.
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