Dynamic Menu
/*
User Interfaces in C#: Windows Forms and Custom Controls
by Matthew MacDonald
Publisher: Apress
ISBN: 1590590457
*/
using System.Data.SqlClient;
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace DynamicMenu
{
/// <summary>
/// Summary description for DynamicMenu.
/// </summary>
public class DynamicMenu : System.Windows.Forms.Form
{
internal System.Windows.Forms.MainMenu mnuMain;
internal System.Windows.Forms.MenuItem mnuFile;
internal System.Windows.Forms.MenuItem mnuNew;
internal System.Windows.Forms.MenuItem mnuOpen;
internal System.Windows.Forms.MenuItem mnuClose;
internal System.Windows.Forms.MenuItem mnuSave;
internal System.Windows.Forms.MenuItem MenuItem12;
internal System.Windows.Forms.MenuItem mnuExit;
internal System.Windows.Forms.MenuItem mnuTools;
internal System.Windows.Forms.MenuItem mnuManageHardware;
internal System.Windows.Forms.MenuItem mnuSetupUserAccounts;
internal System.Windows.Forms.MenuItem mnuChangeDisplay;
internal System.Windows.Forms.MenuItem mnuHelp;
internal System.Windows.Forms.MenuItem mnuContents;
internal System.Windows.Forms.MenuItem MenuItem13;
internal System.Windows.Forms.MenuItem mnuAbout;
internal System.Windows.Forms.Button cmdAdmin;
internal System.Windows.Forms.Button cmdUser;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public DynamicMenu()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form 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.mnuMain = new System.Windows.Forms.MainMenu();
this.mnuFile = new System.Windows.Forms.MenuItem();
this.mnuNew = new System.Windows.Forms.MenuItem();
this.mnuOpen = new System.Windows.Forms.MenuItem();
this.mnuClose = new System.Windows.Forms.MenuItem();
this.mnuSave = new System.Windows.Forms.MenuItem();
this.MenuItem12 = new System.Windows.Forms.MenuItem();
this.mnuExit = new System.Windows.Forms.MenuItem();
this.mnuTools = new System.Windows.Forms.MenuItem();
this.mnuManageHardware = new System.Windows.Forms.MenuItem();
this.mnuSetupUserAccounts = new System.Windows.Forms.MenuItem();
this.mnuChangeDisplay = new System.Windows.Forms.MenuItem();
this.mnuHelp = new System.Windows.Forms.MenuItem();
this.mnuContents = new System.Windows.Forms.MenuItem();
this.MenuItem13 = new System.Windows.Forms.MenuItem();
this.mnuAbout = new System.Windows.Forms.MenuItem();
this.cmdAdmin = new System.Windows.Forms.Button();
this.cmdUser = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// mnuMain
//
this.mnuMain.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.mnuFile,
this.mnuTools,
this.mnuHelp});
//
// mnuFile
//
this.mnuFile.Index = 0;
this.mnuFile.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.mnuNew,
this.mnuOpen,
this.mnuClose,
this.mnuSave,
this.MenuItem12,
this.mnuExit});
this.mnuFile.Text = "File";
//
// mnuNew
//
this.mnuNew.Index = 0;
this.mnuNew.Text = "New";
//
// mnuOpen
//
this.mnuOpen.Index = 1;
this.mnuOpen.Text = "Open";
//
// mnuClose
//
this.mnuClose.Index = 2;
this.mnuClose.Text = "Close";
//
// mnuSave
//
this.mnuSave.Index = 3;
this.mnuSave.Text = "Save";
//
// MenuItem12
//
this.MenuItem12.Index = 4;
this.MenuItem12.Text = "-";
//
// mnuExit
//
this.mnuExit.Index = 5;
this.mnuExit.Text = "Exit";
//
// mnuTools
//
this.mnuTools.Index = 1;
this.mnuTools.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.mnuManageHardware,
this.mnuSetupUserAccounts,
this.mnuChangeDisplay});
this.mnuTools.Text = "Tools";
//
// mnuManageHardware
//
this.mnuManageHardware.Index = 0;
this.mnuManageHardware.Text = "Manage Hardware";
//
// mnuSetupUserAccounts
//
this.mnuSetupUserAccounts.Index = 1;
this.mnuSetupUserAccounts.Text = "Setup User Accounts";
//
// mnuChangeDisplay
//
this.mnuChangeDisplay.Index = 2;
this.mnuChangeDisplay.Text = "Change Display";
//
// mnuHelp
//
this.mnuHelp.Index = 2;
this.mnuHelp.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.mnuContents,
this.MenuItem13,
this.mnuAbout});
this.mnuHelp.Text = "Help";
//
// mnuContents
//
this.mnuContents.Index = 0;
this.mnuContents.Text = "Contents";
//
// MenuItem13
//
this.MenuItem13.Index = 1;
this.MenuItem13.Text = "-";
//
// mnuAbout
//
this.mnuAbout.Index = 2;
this.mnuAbout.Text = "About";
//
// cmdAdmin
//
this.cmdAdmin.FlatStyle = System.Windows.Forms.FlatStyle.System;
this.cmdAdmin.Location = new System.Drawing.Point(132, 88);
this.cmdAdmin.Name = "cmdAdmin";
this.cmdAdmin.Size = new System.Drawing.Size(80, 24);
this.cmdAdmin.TabIndex = 3;
this.cmdAdmin.Text = "Admin Level";
this.cmdAdmin.Click += new System.EventHandler(this.cmdAdmin_Click);
//
// cmdUser
//
this.cmdUser.FlatStyle = System.Windows.Forms.FlatStyle.System;
this.cmdUser.Location = new System.Drawing.Point(44, 88);
this.cmdUser.Name = "cmdUser";
this.cmdUser.Size = new System.Drawing.Size(80, 24);
this.cmdUser.TabIndex = 2;
this.cmdUser.Text = "User Level";
this.cmdUser.Click += new System.EventHandler(this.cmdUser_Click);
//
// DynamicMenu
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
this.ClientSize = new System.Drawing.Size(256, 129);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.cmdAdmin,
this.cmdUser});
this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.Menu = this.mnuMain;
this.Name = "DynamicMenu";
this.Text = "Dynamic Menu";
this.Load += new System.EventHandler(this.DynamicMenu_Load);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new DynamicMenu());
}
private void DynamicMenu_Load(object sender, System.EventArgs e)
{
cmdUser_Click(null,null);
}
private void cmdUser_Click(object sender, System.EventArgs e)
{
DataTable dtPermissions;
// Get permissions for an Admin-level user.
dtPermissions = DBPermissions.GetPermissions(DBPermissions.Level.User);
// Update the menu with these permissions.
SearchMenu(this.Menu, dtPermissions);
}
private void cmdAdmin_Click(object sender, System.EventArgs e)
{
DataTable dtPermissions;
// Get permissions for an Admin-level user.
dtPermissions = DBPermissions.GetPermissions(DBPermissions.Level.Admin);
// Update the menu with these permissions.
SearchMenu(this.Menu, dtPermissions);
}
private void SearchMenu(Menu menu, DataTable dtPermissions)
{
DataRow[] rowMatch;
foreach (MenuItem mnuItem in menu.MenuItems)
{
// See if this menu item has a corresponding row.
rowMatch = dtPermissions.Select("ControlName = '" + mnuItem.Text + "'");
// If it does, configure the menu item state accordingly.
if (rowMatch.GetLength(0) > 0)
{
DBPermissions.State state;
state = (DBPermissions.State)int.Parse(rowMatch[0]["State"].ToString());
switch (state)
{
case DBPermissions.State.Hidden:
mnuItem.Visible = false;
break;
case DBPermissions.State.Disabled:
mnuItem.Enabled = false;
break;
}
}
else
{
mnuItem.Visible = true;
mnuItem.Enabled = true;
}
// Search recursively through any submenus.
if (mnuItem.MenuItems.Count > 0)
{
SearchMenu(mnuItem, dtPermissions);
}
}
}
}
public class DBPermissions
{
public enum State
{
Normal = 0,
Disabled = 1,
Hidden = 2
}
public enum Level
{
Admin,
User
}
private static SqlConnection con = new SqlConnection("Data Source=localhost;"
+ "Integrated Security=SSPI;Initial Catalog=Apress;");
public static DataTable GetPermissions(Level userLevel)
{
con.Open();
// Permissions isn't actually actually a table in our data source.
// Instead, it's a view that combines the important information
// from all three tables using a Join query.
string selectPermissions = "SELECT * FROM Permissions ";
switch (userLevel)
{
case Level.Admin:
selectPermissions += "WHERE LevelName = 'Admin'";
break;
case Level.User:
selectPermissions += "WHERE LevelName = 'User'";
break;
}
SqlCommand cmd = new SqlCommand(selectPermissions, con);
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
adapter.Fill(ds, "Permissions");
con.Close();
return ds.Tables["Permissions"];
}
}
}
/*
-- Database Dump Wizard Ver 2.2.1 (libmssql version 2.3)
--
-- Host: localhost Database: [Apress]
-- ---------------------------------------------------------
-- Server version Microsoft SQL Server Version 8.0.255
-- Dumping user-defined datatypes in '[Apress]'
-- Table structure for table 'Controls'
CREATE TABLE [Controls] (
[ID] int IDENTITY NOT NULL,
[ControlName] varchar(20) NOT NULL)
GO
CREATE UNIQUE CLUSTERED INDEX PK_Controls ON [Controls] (ID)
GO
-- Dumping data for table 'Controls'
--
-- Enable identity insert
SET IDENTITY_INSERT [Controls] ON
GO
INSERT INTO [Controls] ([ID], [ControlName])
VALUES(1, 'New')
GO
INSERT INTO [Controls] ([ID], [ControlName])
VALUES(2, 'Save')
GO
INSERT INTO [Controls] ([ID], [ControlName])
VALUES(3, 'Manage Hardware')
GO
INSERT INTO [Controls] ([ID], [ControlName])
VALUES(4, 'Setup User Accounts')
GO
-- Disable identity insert
SET IDENTITY_INSERT [Controls] OFF
GO
-- Table structure for table 'Controls_Levels'
CREATE TABLE [Controls_Levels] (
[ID] int IDENTITY NOT NULL,
[Control_ID] int NOT NULL,
[Level_ID] int NOT NULL,
[State] smallint)
GO
CREATE UNIQUE CLUSTERED INDEX PK_Control_Levels ON [Controls_Levels] (ID)
GO
-- Dumping data for table 'Controls_Levels'
--
-- Enable identity insert
SET IDENTITY_INSERT [Controls_Levels] ON
GO
INSERT INTO [Controls_Levels] ([ID], [Control_ID], [Level_ID], [State])
VALUES(1, 1, 2, 1)
GO
INSERT INTO [Controls_Levels] ([ID], [Control_ID], [Level_ID], [State])
VALUES(2, 2, 2, 1)
GO
INSERT INTO [Controls_Levels] ([ID], [Control_ID], [Level_ID], [State])
VALUES(3, 3, 2, 2)
GO
INSERT INTO [Controls_Levels] ([ID], [Control_ID], [Level_ID], [State])
VALUES(4, 4, 2, 2)
GO
-- Disable identity insert
SET IDENTITY_INSERT [Controls_Levels] OFF
GO
-- Table structure for table 'Levels'
CREATE TABLE [Levels] (
[ID] int IDENTITY NOT NULL,
[LevelName] varchar(50))
GO
CREATE UNIQUE CLUSTERED INDEX PK_UserLevels ON [Levels] (ID)
GO
-- Dumping data for table 'Levels'
--
-- Enable identity insert
SET IDENTITY_INSERT [Levels] ON
GO
INSERT INTO [Levels] ([ID], [LevelName])
VALUES(1, 'Admin')
GO
INSERT INTO [Levels] ([ID], [LevelName])
VALUES(2, 'User')
GO
-- Disable identity insert
SET IDENTITY_INSERT [Levels] OFF
GO
CREATE VIEW [Permissions]
AS
SELECT Controls.ControlName, Levels.LevelName, Controls_Levels.State
FROM Controls INNER JOIN
Controls_Levels ON Controls.ID = Controls_Levels.Control_ID INNER JOIN
Levels ON Controls_Levels.Level_ID = Levels.ID
GO
*/
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