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

namespace IssueVision
{
	// This is the IssueVision specific control that derives from the generic 
	// Outlook-like ExandableList control. Responsible for rendering the 
	// content of each row.
	public class IssueList : ExpandableList
	{
		// maps to the icons in the imagelist
		private enum RowStateIcon
		{
			Conflict = 0,
			Modified = 1
		}

		// cell space in each row
		private const int Buffer = 4;
		// where to draw the second column of information (from right side)
		private const int RightBuffer = 90;
		// don't draw the second column if the control is only this wide
		private const int DrawRightSideWidth = 200;
		// room for icon on the left side
		private const int LeftPos = 22;
		
		// gdi objects
		private StringFormat m_formatRight;
		private StringFormat m_formatEllipsis;
		
		private IssueSubject m_subject;
		private ImageList imageList;

		private IContainer components;

		public IssueSubject Subject
		{
			set
			{
				m_subject = value;
			}
		}

		public IssueList()
		{
			// right aligned text, setting the DirectionRightToLeft
			// works better then setting Alignment to StringAlignment.Far,
			// the latter approach does not always align the strings correctly
			m_formatRight = new StringFormat(StringFormatFlags.DirectionRightToLeft);
			
			// strings with ellipsis
			m_formatEllipsis = new StringFormat();
			m_formatEllipsis.FormatFlags = StringFormatFlags.NoWrap;
			m_formatEllipsis.Trimming = StringTrimming.EllipsisCharacter;
			
			InitializeComponent();
		}

		// a row needs to be painted
		protected override void OnDrawItem(DrawItemEventArgs e, DataRowView dr)
		{
			// 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 & DrawItemState.Selected) != 0)
			{
				if ((e.State & DrawItemState.Focus) != 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;
				}
			}
			
			//background
			e.Graphics.FillRectangle(brushBack, e.Bounds);
			
			//decrease the bounds to get a visual buffer around each row
			RectangleF rc = new RectangleF(e.Bounds.X, e.Bounds.Y, e.Bounds.Width, e.Bounds.Height);
			rc.Inflate(-Buffer, -Buffer);
			
			//values
			DrawValues(e.Graphics, rc, brushText, brushDim, dr);
			
			//icon
			DrawIcon(e.Graphics, (int)rc.Left, (int)rc.Top, dr);
		}

		// draw content of a row
		private void DrawValues(Graphics g, RectangleF rc, Brush brushText, Brush brushDim, DataRowView dr)
		{
			// calculate the bounds of the title, necessary to 
			// draw ellipsis if string is too long
			RectangleF bounds = new RectangleF(rc.Left + LeftPos, rc.Top, rc.Width - LeftPos, Font.Height);
			
			//see if should leave room for the second column (date and username)
			if (rc.Width > DrawRightSideWidth)
			{
				bounds.Width -= RightBuffer;
			}
			
			//title
			g.DrawString((string)dr["Title"], Font, brushText, bounds, m_formatEllipsis);
			
			//comments
			bounds.Y += this.Font.Height + 2;
			g.DrawString((string)dr["Description"], Font, brushDim, bounds, m_formatEllipsis);
			
			//second column, date and open status
			if (rc.Width > DrawRightSideWidth)
			{
				//date
				g.DrawString(((DateTime)dr["DateOpened"]).ToShortDateString(), Font, brushDim, rc.Right, rc.Top, m_formatRight);
				
				//open / closed
				if ((bool)dr["IsOpen"])
				{
					g.DrawString("Open", Font, brushText, rc.Right, rc.Top + Font.Height + 2.0F, m_formatRight);
				}
				else
				{
					g.DrawString("Closed", Font, brushDim, rc.Right, rc.Top + Font.Height + 2.0F, m_formatRight);
				}
			}
		}

		// rows can have conflict, modified or no icon
		private void DrawIcon(Graphics g, int x, int y, DataRowView dr)
		{
			// conflict
			if (m_subject.ConflictItems != null && m_subject.ConflictItems.ContainsKey(dr["IssueID"]))
			{
				imageList.Draw(g, x, y, (int)RowStateIcon.Conflict);
				return;
			}
			
			// modified
			if (dr.Row.RowState == DataRowState.Modified || dr.Row.RowState == DataRowState.Added)
			{
				imageList.Draw(g, x, y, (int)RowStateIcon.Modified);
			}
		}

		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(IssueList));
			this.imageList = new System.Windows.Forms.ImageList(this.components);
			// 
			// imageList
			// 
			this.imageList.ColorDepth = System.Windows.Forms.ColorDepth.Depth32Bit;
			this.imageList.ImageSize = new System.Drawing.Size(16, 16);
			this.imageList.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imageList.ImageStream")));
			this.imageList.TransparentColor = System.Drawing.Color.Lime;
			// 
			// IssueList
			// 
			this.Name = "IssueList";

		}

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

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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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