Demonstrate the use of .NET Framework Code Access Security, in which code can have permissions independent of the person executing the code - Computer Programming

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Thursday, October 6, 2011

Demonstrate the use of .NET Framework Code Access Security, in which code can have permissions independent of the person executing the code


Aim:-  Demonstrate   the use of .NET Framework Code Access Security, in which code can have permissions independent of the person executing the code

Source code:-

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;

namespace WindowsApplication27
{
      public class Form1 : System.Windows.Forms.Form
      {
            private System.Windows.Forms.Button CreateFileNoErrorHandling;
            private System.Windows.Forms.Button CreateFileWithErrorHandling;
            private System.Windows.Forms.StatusBar statusBar1;
            private System.ComponentModel.Container components = null;
            public Form1()
            {
                  InitializeComponent();
            }
       protected override void Dispose( bool disposing )
            {
                  if( disposing )
                  {
                        if (components != null)
                        {
                              components.Dispose();
                        }
                  }
                  base.Dispose( disposing );
            }
            #region Windows Form Designer generated code
            private void InitializeComponent()
            {
            this.CreateFileNoErrorHandling = new System.Windows.Forms.Button();
            this.CreateFileWithErrorHandling = new System.Windows.Forms.Button();
            this.statusBar1 = new System.Windows.Forms.StatusBar();
            this.SuspendLayout();
            this.CreateFileNoErrorHandling.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(255)))), ((int)(((byte)(224)))), ((int)(((byte)(192)))));
            this.CreateFileNoErrorHandling.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(0)))), ((int)(((byte)(0)))), ((int)(((byte)(192)))));
            this.CreateFileNoErrorHandling.Location = new System.Drawing.Point(128, 48);
            this.CreateFileNoErrorHandling.Name = "CreateFileNoErrorHandling";
            this.CreateFileNoErrorHandling.Size = new System.Drawing.Size(112, 23);
            this.CreateFileNoErrorHandling.TabIndex = 0;
            this.CreateFileNoErrorHandling.Text = "No Error Handling";
            this.CreateFileNoErrorHandling.UseVisualStyleBackColor = false;
            this.CreateFileNoErrorHandling.Click += new System.EventHandler(this.CreateFileNoErrorHandling_Click);
            this.CreateFileWithErrorHandling.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(255)))), ((int)(((byte)(224)))), ((int)(((byte)(192)))));
            this.CreateFileWithErrorHandling.ForeColor = System.Drawing.Color.FromArgb(((int)(((byte)(0)))), ((int)(((byte)(0)))), ((int)(((byte)(192)))));
            this.CreateFileWithErrorHandling.Location = new System.Drawing.Point(304, 48);
            this.CreateFileWithErrorHandling.Name = "CreateFileWithErrorHandling";
            this.CreateFileWithErrorHandling.Size = new System.Drawing.Size(112, 23);
            this.CreateFileWithErrorHandling.TabIndex = 1;
            this.CreateFileWithErrorHandling.Text = "With Error Handling";
            this.CreateFileWithErrorHandling.UseVisualStyleBackColor = false;
            this.CreateFileWithErrorHandling.Click += new System.EventHandler(this.CreateFileWithErrorHandling_Click);
            this.statusBar1.Location = new System.Drawing.Point(0, 425);
            this.statusBar1.Name = "statusBar1";
            this.statusBar1.Size = new System.Drawing.Size(608, 22);
            this.statusBar1.TabIndex = 2;
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(608, 447);
            this.Controls.Add(this.statusBar1);
            this.Controls.Add(this.CreateFileWithErrorHandling);
            this.Controls.Add(this.CreateFileNoErrorHandling);
            this.Name = "Form1";
            this.Text = "Code Access Security";
            this.Load += new System.EventHandler(this.Form1_Load);
            this.ResumeLayout(false);

            }
            #endregion

            static void Main()
            {
                  Application.Run(new Form1());
            }

            private void CreateFileNoErrorHandling_Click(object sender, System.EventArgs e)
            {          System.IO.File.Create("c:\\test1.txt");
                  statusBar1.Text = "File (test1.txt) Created Successfully";

            }
            private void CreateFileWithErrorHandling_Click(object sender, System.EventArgs e)
            {
                  try
                  {
                        System.IO.File.Create("c:\\test2.txt");
                        statusBar1.Text = "File (test2.txt) Created Successfully";

                  }
                  catch (Exception ex)
                  {
                        statusBar1.Text = "The following error occurred " + ex.Message + " creating file (test2.txt)";
                  }
            }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
      }
}

Output:-


Result:- The  programme is executed successfully without  any errors.

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