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Implementing WS-SecureConversation in Microsoft IssueVision

, 27 Sep 2005
Adding secure communications to the Microsoft IssueVision sample application using WSE 2.0.
issuevisionwsesmartclient.zip
Database
IssueVision
Controls
Outlook
Images
statusbar
toolbar
types
Libraries
ThreadHelper Documentation
Panes
Patterns
Web References
localhost
IssueVisionWebWseCS
Libraries
App.ico
IssueVision.csproj.user
IssueVision.snk
IssueVisionServices.disco
IssueVisionServices.wsdl
Reference.map
AppUpdater.dll
ThreadHelper.dll
About BackgroundWorker.doc
Async Windows Forms Programming with BackgroundWorker.doc
IssueVision-about-banner.png
mosaic-light.png
Signin.png
all_staffers.png
all_types.png
computer.png
environmental.png
help_desk.png
network.png
none.png
printer.png
staff.png
technicians.png
technicians_group.png
telecom.png
new_task.png
synchronize.png
work_offline.png
StatusConnected.ico
StatusDisconnected.ico
StatusSynchronizing.ico
IssueVisionWebWseCS.csproj.webinfo
IVDataSet.xsx
using System;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Resources;
using System.Windows.Forms;

namespace IssueVision
{
	public class SectionControl : UserControl
	{
		// events
		public delegate void DrawItemEventHandler(object sender, DrawItemEventArgs e, DataRowView dr);
		public delegate void SelectionChangedEventHandler(SectionControl sender, DataRowView dr);
		public delegate void SelectionDoubleClickedEventHandler(SectionControl sender, DataRowView dr);
		
		public virtual event DrawItemEventHandler DrawItem;
		public virtual event SelectionChangedEventHandler SelectionChanged;
		public virtual event SelectionDoubleClickedEventHandler SelectionDoubleClicked;
		
		private ImageList imageList;
		private PictureBox pictExpand;
		
		// const values
		public const int DefaultItemHeight = 36;
		private const int HeaderHeight = 40;
		
		
		private int m_expansionState = 1;
		private int m_itemHeight = SectionControl.DefaultItemHeight;
		private DataRowView[] m_rows;
		private string m_groupTitle = string.Empty;
		private int m_currrentSelectionIndex = -1;
		private Pen m_penSeparate;
		private Font m_fontGroupTitle;
		private StringFormat m_format;

		private IContainer components;

		[DescriptionAttribute("Gets and sets a data source for this group.")]
		[CategoryAttribute("Data")]
		[DefaultValueAttribute(null)]
		public DataRowView[] DataSource
		{
			get
			{
				return m_rows;
			}

			set
			{
				m_rows = value;
				UpdateLayout();
			}
		}

		[DefaultValueAttribute(SectionControl.DefaultItemHeight)]
		[CategoryAttribute("Layout")]
		[DescriptionAttribute("Height of each row in the group.")]
		public int ItemHeight
		{
			get
			{
				return m_itemHeight;
			}

			set
			{
				m_itemHeight = value;
			}
		}

		[BrowsableAttribute(false)]
		public int SelectedIndex
		{
			get
			{
				return m_currrentSelectionIndex;
			}

			set
			{
				if (m_currrentSelectionIndex != value)
				{
					m_currrentSelectionIndex = value;
					Invalidate();
				}
			}
		}

		[BrowsableAttribute(false)]
		public int Count
		{
			get
			{
				if (m_rows == null)
				{
					return 0;
				}
				else
				{
					return m_rows.Length;
				}
			}
		}

		public override string Text
		{
			get
			{
				return m_groupTitle;
			}

			set
			{
				m_groupTitle = value;
			}
		}

		public SectionControl()
		{
			InitializeComponent();
			
			// init gdi objects
			m_penSeparate = new Pen(SystemColors.InactiveCaption, 2.0F);
			
			// font for the group section header
			m_fontGroupTitle = new Font("tahoma", Font.Size, FontStyle.Bold);
			
			// draw strings w/ ellipsis
			m_format = new StringFormat();
			m_format.FormatFlags = StringFormatFlags.NoWrap;
			m_format.LineAlignment = StringAlignment.Center;
			m_format.Trimming = StringTrimming.EllipsisCharacter;
			
			// turn on double buffering
			SetStyle(ControlStyles.UserPaint | ControlStyles.ResizeRedraw | ControlStyles.AllPaintingInWmPaint | ControlStyles.DoubleBuffer, true);
		}

		// Return the row index that contains the specified data row.
		public int GetRow(DataRowView dr)
		{
			// return right away if don't have any rows
			if (dr == null || m_rows == null || m_rows.Length == 0)
			{
				return -1;
			}
			
			// look for the matching row
			for (int i = 0; i < m_rows.Length; i++)
			{
				if (m_rows[i].Row.Equals(dr.Row))
				{
					return i;
				}
			}
			
			// did not find a match
			return -1;
		}

		// Set the expand / collapse image.
		private void SetImage(int index)
		{
			pictExpand.Image = imageList.Images[index];
		}

		// Calculate the total height of the control.
		private void UpdateLayout()
		{
			if (m_expansionState == 1)
			{
				Height = HeaderHeight + m_rows.Length * (m_itemHeight + 1);
			}
			else
			{
				Height = HeaderHeight;
			}
		}

		protected override void OnPaint(PaintEventArgs e)
		{
			//Draw the group title
			RectangleF groupTitleBounds = new RectangleF(	pictExpand.Right + 5,
															pictExpand.Top,
															this.Width - pictExpand.Right - 10,
															m_fontGroupTitle.Height);
															
			e.Graphics.DrawString(this.Text, m_fontGroupTitle, SystemBrushes.Highlight, groupTitleBounds, m_format);
			
			//Draw a line to separate the header from its associated items.
			e.Graphics.DrawLine(m_penSeparate, 0, HeaderHeight - 1, this.Width, HeaderHeight - 1);
			
			//Loop through and draw each row.
			int topItem = HeaderHeight;
			int index = 0;
			foreach (DataRowView dr in m_rows)
			{
				// Determine what state the row is in.
				DrawItemState state = DrawItemState.None;
				
				if (m_currrentSelectionIndex == index)
					state = state | DrawItemState.Selected;
					
				if (this.Focused)
					state = state | DrawItemState.Focus;

				// Create object that holds the drawing data.
				DrawItemEventArgs drawArg = new DrawItemEventArgs(	e.Graphics, 
																	this.Font,
																	new Rectangle(0, topItem, this.Width, m_itemHeight), 
																	index, 
																	state);
				// Have some other code render the item.
				OnDrawItem(drawArg, dr);

				// Draw a line to separate each item.
				e.Graphics.DrawLine(SystemPens.Control, 0, topItem + m_itemHeight, this.Width, topItem + m_itemHeight);

				// Update the top of the next item.
				topItem += m_itemHeight + 1;
				index += 1;
			}
		}
		
		protected virtual void OnDrawItem(DrawItemEventArgs e, DataRowView dr)
		{
			if (DrawItem != null)
			{
				DrawItem(this, e, dr);
			}
		}

		private void SectionControl_Load(object sender, EventArgs e)
		{
			SetImage(m_expansionState);
			UpdateLayout();
		}

		private void PictExpand_Click(object sender, EventArgs e)
		{
			m_expansionState = 1 - m_expansionState;
			SetImage(m_expansionState);
			UpdateLayout();
		}

		protected override void Dispose(bool disposing)
		{
			if (disposing && components != null)
			{
				components.Dispose();
			}
			base.Dispose(disposing);
		}

		[DebuggerStepThroughAttribute()]
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(SectionControl));
			this.pictExpand = new System.Windows.Forms.PictureBox();
			this.imageList = new System.Windows.Forms.ImageList(this.components);
			this.SuspendLayout();
			// 
			// pictExpand
			// 
			this.pictExpand.Location = new System.Drawing.Point(8, 16);
			this.pictExpand.Name = "pictExpand";
			this.pictExpand.Size = new System.Drawing.Size(11, 11);
			this.pictExpand.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize;
			this.pictExpand.TabIndex = 0;
			this.pictExpand.TabStop = false;
			this.pictExpand.Click += new EventHandler(this.PictExpand_Click);
			// 
			// imageList
			// 
			this.imageList.ImageSize = new System.Drawing.Size(11, 11);
			this.imageList.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imageList.ImageStream")));
			this.imageList.TransparentColor = System.Drawing.Color.Lime;
			// 
			// SectionControl
			// 
			this.BackColor = System.Drawing.SystemColors.Window;
			this.Controls.Add(this.pictExpand);
			this.Name = "SectionControl";
			this.Size = new System.Drawing.Size(208, 48);
			base.DoubleClick += new EventHandler(this.SectionControl_DoubleClick);
			base.MouseDown += new MouseEventHandler(this.SectionControl_MouseDown);
			base.GotFocus += new EventHandler(this.SectionControl_GotFocus);
			base.LostFocus += new EventHandler(this.SectionControl_LostFocus);
			base.Load += new EventHandler(this.SectionControl_Load);
			this.ResumeLayout(false);
		}

		private void SectionControl_DoubleClick(object sender, EventArgs e)
		{
			if (SelectionDoubleClicked != null)
			{
				SelectionDoubleClicked(this, null);
			}
		}

		private void SectionControl_MouseDown(object sender, MouseEventArgs e)
		{
			// holds the new selection
			int sel;

			if (e.Y < HeaderHeight)
			{
				// the header was selected, usually would set this to -1
				// but set to the first item in the list (selecting the
				// header selects the first row)
				if (m_rows == null || m_rows.Length == 0)
				{
					// the group does not contain any rows
					sel = -1;
				}
				else
				{
					// the first row in the group
					sel = 0;
				}
			}
			else
			{
				// the selected row
				sel = (e.Y - HeaderHeight) / (m_itemHeight + 1);
			}

			// update if a new row was selected
			if (sel != m_currrentSelectionIndex)
			{
				m_currrentSelectionIndex = sel;
				Invalidate();
				OnSelectionChanged(m_currrentSelectionIndex);
			}
		}

		protected virtual void OnSelectionChanged(int index)
		{
			// pass the selected row data if available
			if (index == -1)
			{
				if (SelectionChanged != null)
				{
					SelectionChanged(this, null);
				}
			}
			else if (SelectionChanged != null)
			{
				SelectionChanged(this, m_rows[index]);
			}
		}

		private void SectionControl_GotFocus(object sender, EventArgs e)
		{
			// Invalidate so the selected row can be repainted
			if (m_currrentSelectionIndex != -1)
			{
				Invalidate();
			}
		}

		private void SectionControl_LostFocus(object sender, EventArgs e)
		{
			// Invalidate so the selected row can be repainted
			if (m_currrentSelectionIndex != -1)
			{
				Invalidate();
			}
		}
	}
}

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About the Author

Weidong Shen
Software Developer (Senior)
United States United States
Weidong has been an information system professional since 1990. He has a Master's degree in Computer Science, and is currently a MCSD .NET

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Web01 | 2.8.140721.1 | Last Updated 27 Sep 2005
Article Copyright 2005 by Weidong Shen
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