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Developing Next Generation Smart Clients using .NET 2.0 working with Existing .NET 1.1 SOA-based XML Web Services

, 16 Aug 2005
Comprehensive guide to development of .NET 2.0 Smart Clients working with existing Service Oriented Architecture based XML web services, fully utilizing the Enterprise Library
smartclientsoa_src.zip
SmartClient
Client
SMI.App
Controls
Forms
Modules
Properties
app.manifest
Settings.settings
Resources
240.png
Bottom.png
BuilderDialog_delete.bmp
DarkBlue.bmp
download-xp.gif
Earth.png
fldropen.png
iSync.gif
Leonardo_da_Vinci_My_Computer.png
LightBlue.bmp
LoginBox.jpg
LoginButton.jpg
LoginButton1.jpg
LoginButton2.jpg
Logo1.png
LogoPic.jpg
Middle.png
Refresh.bmp
refresh.ico
refresh1.ico
RightArrow.bmp
SuccessComplete.bmp
Task.bmp
Tasks.png
Top.png
TurnOffButton.bmp
wi0062-32.ico
wi0063-32.ico
wi0064-16.ico
wi0064-32.ico
SmartInstitute.App.csproj.user
wi0064-32.ico
SMI.Automation
Commands
Course
Framework
Security
Students
UI
Controls
Documents
MiscDocuments
StudentDocuments
Factories
Forms
Helpers
Misc
Properties
Settings.settings
Resources
BuilderDialog_delete.bmp
LogoSmall.bmp
Misho.jpg
My Pic 7.jpg
table.ico
SmartInstitute.Automation.csproj.user
Web References
SmartInstituteServices.AccountService
Account.datasource
AccountService.disco
AccountService.wsdl
Reference.map
SmartInstituteServices.CourseService
Course.datasource
CourseService.disco
CourseService.wsdl
Reference.map
SmartInstituteServices.SecurityService
Reference.map
SecurityService.disco
SecurityService.wsdl
SmartInstituteServices.StudentService
Reference.map
Student.datasource
StudentService.disco
StudentService.wsdl
SMI.ObjectModel.Enhanced
Base
Models
Properties
Settings.settings
Settings
SmartInstitute.ObjectModel.csproj.user
UMS.ObjectModel.Enhanced.csproj.user
SMI.Objects
SmartInstitute.csproj.user
CodeSmith
Tier
BusinessLogicLayer
Entity.cst
EntityBase.cst
EntityCollection.cst
EntityCollectionBase.cst
Enum.cst
IEntity.cst
DataAccessLayer
App.config.cst
CommonSql.cst
Configuration.cst
DBConcurrencyException.cst
DBException.cst
Factories
EntityRepositoryFactory.cst
IEntityRepository.cst
SqlClient
CVS
Entries
Entries.Extra
Entries.Extra.Old
Entries.Old
Repository
Root
TortoiseCVS.Status
SqlEntityRepository.cst
SqlEntityRepositoryBase.cst
TransactionManager.cst
UnitTests
EntityRepositoryTest.cst
WebServiceClient
WsEntityRepository.cst
WsEntityRepositoryBase.cst
Main.cst
nant.cst
References
GotDotNet.ApplicationBlocks.Data.dll
Microsoft.ApplicationBlocks.Data.dll
nunit.framework.dll
StoredProcedures.cst
vsnet2003.project.cst
vsnet2003.solution.cst
vsnet2005.project.cst
vsnet2005.solution.cst
WebService
Web.config.cst
WebService.cst
Database
SmartInstitute.bak
Library
Microsoft.Practices.EnterpriseLibrary.Caching.dll
Microsoft.Practices.EnterpriseLibrary.Common.dll
Microsoft.Practices.EnterpriseLibrary.Configuration.dll
Microsoft.Practices.EnterpriseLibrary.Data.dll
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.dll
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.Logging.dll
Microsoft.Practices.EnterpriseLibrary.Logging.dll
Microsoft.Practices.EnterpriseLibrary.Security.ActiveDirectory.dll
Microsoft.Practices.EnterpriseLibrary.Security.Cache.CachingStore.dll
Microsoft.Practices.EnterpriseLibrary.Security.Cryptography.dll
Microsoft.Practices.EnterpriseLibrary.Security.Database.Authentication.dll
Microsoft.Practices.EnterpriseLibrary.Security.Database.dll
Microsoft.Practices.EnterpriseLibrary.Security.dll
nunit.core.dll
nunit.framework.dll
Server
BLL
SmartInstitute.csproj.user
DAL
Factories
SmartInstitute.DataAccessLayer.csproj.user
SqlClient
Utilities
GotDotNet.ApplicationBlocks.Data.dll
Microsoft.ApplicationBlocks.Data.dll
nunit.framework.dll
UnitTests
SmartInstitute.build
SmartInstitute.Facade
FacadeTest
SmartInstitute.Facade.csproj.user
SmartInstitute.Test
App.ico
SmartInstitute.Test.csproj.user
SmartInstituteServices
Global.asax
log
SmartInstituteServices.csproj.webinfo
SQL
Setup
SecurityDatabase
SecurityDatabaseConsole
App.ico
SecurityDatabaseConsole.exe.manifest
SR.strings
Tests
Tools.SecurityDatabaseConsole.csproj.user
#region Using directives

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Drawing.Imaging;
using SmartInstitute.Client.Automation;
using SmartInstitute.ObjectModel;
using SmartInstitute;
using SmartInstitute.Client.Automation.Helpers;
using System.Drawing.Drawing2D;

#endregion

namespace SmartInstitute.Client.Modules
{
	public partial class OfferedCourseTree : TreeView
	{
		private Font _BoldFont;

		#region Construction

		public OfferedCourseTree()
		{
			InitializeComponent();

			//base.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.UserPaint, true);

			this._BoldFont = new Font(base.Font, FontStyle.Bold);
		}

		public void Load()
		{
//			if( !base.DesignMode )
//				this.PopulateDummyData();
			
			_Application.Courses.OnItemChange += new ItemChangeHandler(Courses_OnItemChange);
			this.LoadCourses();

		}

		#endregion

		#region Tree Population

		/// <summary>
		/// Reload the course tree 
		/// </summary>
		public void LoadCourses()
		{
			this.BeginUpdate();
			
			this.Nodes.Clear();

			foreach (CourseModel courseModel in _Application.Courses)
			{
				// Add the course node
				this.AddCourseNode(courseModel);
			}

			this.EndUpdate();
		}


		/// <summary>
		/// If the course node is added in the tree, refresh its status
		/// otherwise add the course
		/// </summary>
		/// <param name="courseModel"></param>
		private void RefreshCourse( CourseModel courseModel )
		{
			CourseNode node = this.FindCourseNode(courseModel);
			
			if (null == node)
				this.AddCourseNode(courseModel);
			else
				this.UpdateCourseNode(courseModel, node);
		}

		/// <summary>
		/// Find the tree node which contains the specified course node
		/// </summary>
		/// <param name="courseModel"></param>
		/// <returns></returns>
		private CourseNode FindCourseNode( CourseModel courseModel )
		{
			foreach (CourseNode node in base.Nodes)
			{
				if (node.Course.ID == courseModel.Course.ID)
					return node;
			}

			return null;
		}

		/// <summary>
		/// Create a course node in the tree
		/// </summary>
		/// <param name="courseModel"></param>
		private void AddCourseNode( CourseModel courseModel )
		{
			// 1. Create the course node
			CourseNode courseNode = new CourseNode(courseModel.Course);
		
			// 2. Create section nodes for the course
			this.AddSectionNodes(courseNode, courseModel.Course.CourseSectionCollection);

			// 3. Add the node in the tree
			base.Nodes.Add(courseNode);
            base.SelectedNode = courseNode;
            courseNode.EnsureVisible();
        }

		/// <summary>
		/// Create section nodes for the course
		/// </summary>
		/// <param name="courseNode"></param>
		/// <param name="sections"></param>
		private void AddSectionNodes(CourseNode courseNode, CourseSectionCollection sections)
		{
			courseNode.Nodes.Clear();

			foreach (CourseSection section in sections)
			{
				SectionNode sectionNode = new SectionNode(section);
				
				this.AddRoutineNode(sectionNode, section.SectionRoutineCollection);

				courseNode.Nodes.Add(sectionNode);
			}
		}

		/// <summary>
		/// Create routine nodes for the section
		/// </summary>
		/// <param name="sectionNode"></param>
		/// <param name="routines"></param>
		private void AddRoutineNode( SectionNode sectionNode, SectionRoutineCollection routines )
		{
			sectionNode.Nodes.Clear();

			foreach (SectionRoutine routine in routines)
			{
				RoutineNode routineNode = new RoutineNode(routine);
				sectionNode.Nodes.Add(routineNode);
			}
		}

		#endregion

		#region protected override void OnDrawNode(DrawTreeNodeEventArgs e)

		protected override void OnDrawNode(DrawTreeNodeEventArgs e)
		{
			// colors that depend if the row is currently selected or not, 
			// assign to a system brush so should not be disposed
			// not selected colors
			Brush brushBack = SystemBrushes.Window;
			Brush brushText = SystemBrushes.WindowText;
			Brush brushDim = Brushes.Gray;

			if ((e.State & TreeNodeStates.Selected) != 0)
			{
				if ((e.State & TreeNodeStates.Focused) != 0)
				{
					// selected and has focus
					brushBack = SystemBrushes.Highlight;
					brushText = SystemBrushes.HighlightText;
					brushDim = SystemBrushes.HighlightText;
				}
				else
				{
					// selected and does not have focus
					brushBack = SystemBrushes.Control;
					brushDim = SystemBrushes.WindowText;
				}
			}
			RectangleF rc = new RectangleF(e.Bounds.X, e.Bounds.Y, this.ClientRectangle.Width, e.Bounds.Height);
			
			// background			
			e.Graphics.FillRectangle(brushBack, rc);


			//base.OnDrawNode(e);

			if (rc.Width > 0 && rc.Height > 0)
			{
				if (e.Node is CourseNode)
					this.DrawCourseNode(e, rc, brushBack, brushText, brushDim);
				else if (e.Node is SectionNode)
					this.DrawSectionNode(e, rc, brushBack, brushText, brushDim);
				else if (e.Node is RoutineNode)
					this.DrawRoutineNode(e, rc, brushBack, brushText, brushDim);
			}
		}

		#endregion

		#region protected override void OnResize( EventArgs e )

		protected override void OnResize( EventArgs e )
		{
			base.ItemHeight = (int)(base.CreateGraphics().MeasureString("Wy", base.Font).Height * 2) + 10;
		}

		#endregion

		#region Course Node

		public class CourseNode : TreeNode
		{
			private Course _Course;

			public Course Course
			{
				get { return _Course; }
				set { _Course = value; }
			}

			public CourseNode( Course course ) : base( course.Title )
			{
				this._Course = course;
			}

			public override string ToString()
			{
				return this._Course.Title;
			}

			public int Capacity
			{
				get
				{
					int capacity = 0;
					foreach (SectionNode node in this.Nodes)
					{
						capacity += node.Section.Capacity;
					}
					return capacity;
				}
			}

			public bool IsAllowed
			{
				get
				{
					bool allowed = true;
					foreach (SectionNode section in this.Nodes)
					{
						allowed &= section.IsAllowed;
					}
					return allowed;
				}
			}

		}
		#endregion

		#region Section node

		public class SectionNode : TreeNode
		{
			private CourseSection _Section;

			public CourseSection Section
			{
				get { return _Section; }
				set { _Section = value; }
			}

			public bool IsAllowed
			{
				get
				{
					return this._Section.Capacity > 1; // this._Section.StudentCount;
				}
			}

			public SectionNode(CourseSection section)
				: base(section.Description)
			{
				this._Section = section;
			}

			public override string ToString()
			{
				return this._Section.Description;
			}

		}

		#endregion
		
		#region Routine Node

		public class RoutineNode : TreeNode
		{		
			private SectionRoutine _Routine;

			private string _RoutineText;
			private string _RoomTitle;

			public SectionRoutine Routine
			{
				get { return _Routine;}
				set { _Routine = value;}
			}

			public RoutineNode( SectionRoutine routine )
			{				
				this._Routine = routine;

				this._RoutineText = this._Routine.ToString() + " " +
					this._Routine.Type.ToString();
			}

			public override string ToString()
			{
				return this._RoutineText;
			}

		}

		#endregion

		#region private void DrawSectionNode(DrawTreeNodeEventArgs e, RectangleF rc, Brush brushBack, Brush brushText, Brush brushDim )

		private void DrawSectionNode(DrawTreeNodeEventArgs e, RectangleF rc, Brush brushBack, Brush brushText, Brush brushDim )
		{
			SectionNode node = e.Node as SectionNode;

			if ((e.State & TreeNodeStates.Selected) == 0)
			{
				this.GradientFill(e.Graphics, rc, Color.Gainsboro, Color.White, 0);
			}

			SizeF lineSize = e.Graphics.MeasureString( node.Section.Description, base.Font );

			// Draw the title of the section
			float textX = rc.Left + 4;
			Brush textBrush = brushText;

			// if the current section is not allowed to regiter, dim it
			if (!node.IsAllowed)
				textBrush = brushDim;

			// draw the section title
			e.Graphics.DrawString(node.Section.Description, base.Font, textBrush, textX, rc.Top);

			// Draw section status
			float secondLineY = rc.Top + lineSize.Height;

			// Class ID
			textX += this.DrawString(e.Graphics, node.Section.ClassID, base.Font, textBrush, textX, secondLineY).Width;

			// Decide the status text color according to the status of the section
			this.DrawSectionStatus(e, node, ref textX, secondLineY);

			this.DrawSectionCapacity(e, node, ref textX, secondLineY);

			// Show student count and capacity
			this.DrawSectionCount(e, node, textX, textBrush, secondLineY);

			// horizontal separator
			//e.Graphics.DrawLine(Pens.LightGray, rc.Left, rc.Bottom - 1, rc.Right, rc.Bottom - 1);
		}
		private void DrawSectionCount( DrawTreeNodeEventArgs e, SectionNode node, float textX, Brush textBrush, float secondLineY )
		{
			int capacity = node.Section.Capacity;
			string count = " (" + capacity + ")";
			e.Graphics.DrawString(count, base.Font, textBrush, textX, secondLineY);
		}
		private void DrawSectionCapacity( DrawTreeNodeEventArgs e, SectionNode node, ref float textX, float secondLineY )
		{
//			if (node.Section.Capacity <= node.Section.StudentCount)
//			{
//				textX += this.DrawString(e.Graphics, " Overflow ", base.Font, Brushes.DarkRed, textX, secondLineY).Width;
//			}
		}

		private void DrawSectionStatus( DrawTreeNodeEventArgs e, SectionNode node, ref float textX, float secondLineY )
		{
			Brush statusBrush = Brushes.Green;
			if (node.Section.Status == (int)SectionStatusEnum.Open || node.Section.Status == (int)SectionStatusEnum.Freshmen)
			{
				// green
			}
			else
			{
				statusBrush = Brushes.DarkRed;
			}

			// Show the status using status color
			textX += this.DrawString(e.Graphics, " " + node.Section.Status.ToString() + " ", base.Font, statusBrush, textX, secondLineY).Width;
		}

		#endregion

		#region private SizeF DrawString( Graphics g, string text, Font font, Brush brush, float x, float y )

		private SizeF DrawString( Graphics g, string text, Font font, Brush brush, float x, float y )
		{
			SizeF statusSize = g.MeasureString(text, font);
			g.DrawString(text, font, brush, x, y);
			return statusSize;
		}

		#endregion

		#region private void DrawCourseNode(DrawTreeNodeEventArgs e, RectangleF rc, Brush brushBack, Brush brushText, Brush brushDim)

		private void DrawCourseNode(DrawTreeNodeEventArgs e, RectangleF rc, Brush brushBack, Brush brushText, Brush brushDim)
		{
			CourseNode node = e.Node as CourseNode;

			// Draw the course icon
			//Image image = imglistIcons.Images[0];
			
			//e.Graphics.DrawImage(image, rc.Left, rc.Top);

			if( (e.State & TreeNodeStates.Selected) == 0 )
			{
				this.GradientFill(e.Graphics, rc, Color.White, Color.Gainsboro, rc.Height/2);
			}

			float textX = rc.Left; // +image.Width;
			SizeF titleSize = this.DrawString(e.Graphics, node.Course.Title, base.Font, brushText, textX, rc.Top);

			float secondLineY = rc.Top + titleSize.Height;

			if (!node.IsAllowed)
				textX += this.DrawString(e.Graphics, "All Closed ", base.Font, Brushes.DarkRed, textX, secondLineY ).Width;

			// Show student cound and capacity
			int capacity = node.Capacity;
			//int studentCount = node.StudentCount;
			//string count = studentCount + "/" + capacity + " ";
			string count = "(" + capacity + ") ";
			textX += this.DrawString( e.Graphics, count, base.Font, brushText, textX, secondLineY ).Width;

			// show number of sections
			int sectioncount = node.Course.CourseSectionCollection.Count;
			string sections = sectioncount.ToString() + " section" + (sectioncount>1?"s":"");
			textX += this.DrawString(e.Graphics,  sections, base.Font, brushText, textX, secondLineY).Width;

			// draw a separator
			//e.Graphics.DrawLine(Pens.LightGray, rc.Left, rc.Bottom-1, rc.Right, rc.Bottom-1);
		}

		#endregion

		#region private void DrawRoutineNode( DrawTreeNodeEventArgs e, RectangleF rc, Brush brushBack, Brush brushText, Brush brushDim )

		private void DrawRoutineNode( DrawTreeNodeEventArgs e, RectangleF rc, Brush brushBack, Brush brushText, Brush brushDim )
		{
			RoutineNode node = e.Node as RoutineNode;

			this.GradientFill(e.Graphics, rc, Color.WhiteSmoke, Color.GhostWhite, 0);

			string routineText = node.ToString();
			SizeF size = this.DrawString(e.Graphics, routineText, base.Font, Brushes.Black, rc.Left, rc.Top);


			//this.DrawString(e.Graphics, node.Routine.Teachers, base.Font, Brushes.Gray, rc.Left, rc.Top + size.Height);
		}

		#endregion

        private delegate void RefreshCourseDelegate(CourseModel model);

        void Courses_OnItemChange( ItemBase item, string changeType )
		{
			if (item is CourseModel)
			{
                this.BeginInvoke(new RefreshCourseDelegate(this.RefreshCourse), item as CourseModel);
            }
		}

		private void OfferedCourseTree_KeyUp(object sender, KeyEventArgs e)
		{
			if (e.KeyCode == Keys.Enter)
			{
				e.Handled = true;
				base.SelectedNode.Toggle();
			}
		}

        private void UpdateCourseNode(CourseModel model, CourseNode node)
        {
            // 1. Clear child of the node
            node.Nodes.Clear();

            // 2. Reload the section nodes
            this.AddSectionNodes(node, model.Course.CourseSectionCollection);

            // 3. Make it current
            base.SelectedNode = node;
            node.EnsureVisible();
        }

		private void GradientFill(Graphics g, RectangleF rc, Color from, Color to, float offset)
		{
			RectangleF fillRect = rc;
			fillRect.Size = new SizeF(rc.Width, rc.Height-offset);
			fillRect.Offset(0, offset);
			using (LinearGradientBrush brush = new LinearGradientBrush(fillRect, from, to, 90f))
			{
				g.FillRectangle(brush, fillRect);
			}
		}
	}
}

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About the Author

Omar Al Zabir
Architect BT, UK (ex British Telecom)
United Kingdom United Kingdom

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