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How can I automate Outlook and Word by using Visual C# .NET to create a e-mail message?

Posted on 2008-11-03
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Last Modified: 2013-11-27
As the title may indicate, I'm trying to get one of my applications to be able to send an email.  I found an article from Microsoft that seemed to solve the problem:

http://support.microsoft.com/default.aspx?id=819398

The problem is that this article is targeted at Word 2002/2003, and I have word 2007.  I assumed that this wouldn't be a big deal, and that the same code should work for Word 2007.  It appears I was wrong.  When I attempted to use the code described I got a COMException was unhandled error ("Command Failed") on the line:

Document doc = wApp.Documents.Add(
                        ref template,
                        ref newTemplate,
                        ref documentType,
                        ref visible);

How can I fix this error, or more generally, how can I send an email from a Visual Studio project (using Outlook)?
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.Office;
using System.Runtime.InteropServices;
using Microsoft.Office.Interop.Outlook;
using Microsoft.Office.Interop.Word;
using System.IO;
 
namespace EmailTestApp
{
	public class MyApi
	{
 
		[DllImport("user32.dll")]
		public static extern int FindWindow(string strclassName, string strWindowName);
	};
	
 
 
	public partial class Form1 : Form
	{
 
		
 
		private Microsoft.Office.Interop.Word.Application wApp;
		public Form1()
		{
			InitializeComponent();
		}
 
		private void button1_Click(object sender, System.EventArgs e) { CreateEmailMessage(); }
 
		private void CreateEmailMessage()
		{
			//Initialize the envelope values.
			string strTo = "yourname@yourdomain.com";
			string strBCC = "yourname@yourdomain.com";
			string strCC = "yourname@yourdomain.com";
			string strSubject = "Outlook Automation";
			string strBody = "HTMLPage1.htm";
 
			//Automate the Word document.
			wApp = new Microsoft.Office.Interop.Word.Application();
			wApp.Visible = false;
			object template = System.Reflection.Missing.Value;
			object newTemplate = System.Reflection.Missing.Value;
			object documentType = WdNewDocumentType.wdNewEmailMessage;
			object visible = false;
			wApp.Visible = false;
			Document doc = wApp.Documents.Add(
				ref template,
				ref newTemplate,
				ref documentType,
				ref visible);
 
			//Automate the Outlook mail item.
			MailItemClass mItem = (MailItemClass)doc.MailEnvelope.Item;
			mItem.To = strTo;
			mItem.BCC = strBCC;
			mItem.CC = strCC;
			mItem.Subject = strSubject;
			mItem.BodyFormat = OlBodyFormat.olFormatHTML;
			mItem.HTMLBody = GetString(strBody);
			mItem.ItemEvents_Event_Close += new ItemEvents_CloseEventHandler(this.wApp_Close);
 
			wApp.Visible = true;
 
			// Loop until there are no more references to release.
			while (Marshal.ReleaseComObject(mItem) > 0) ;
			mItem = null;
 
			// Invoke the .NET garbage collector.
			GC.Collect();
			GC.WaitForPendingFinalizers();
		}
		// Close the Word application after the message has been sent.
		private void wApp_Close(ref bool e)
		{
			object oMissing = System.Reflection.Missing.Value;
			wApp.Quit(ref oMissing, ref oMissing, ref oMissing);
		}
 
		// Get the body of the e-mail.
		private string GetString(string filename)
		{
			string strFileStreamText = "";
			string strTempRead = "";
			try
			{
				if ("" == filename)
				{
					filename = "HTMLPage1.htm";
				}
				System.IO.Stream fin = File.OpenRead(filename);
				System.IO.StreamReader sr = new System.IO.StreamReader(fin);
				strTempRead = sr.ReadToEnd();
				strFileStreamText = strFileStreamText + strTempRead;
				sr.Close();
			}
			catch (System.Exception exp1)
			{
				MessageBox.Show(exp1.Message);
			}
			return strFileStreamText;
		}
	}
}

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Question by:guxiyou
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4 Comments
 
LVL 14

Accepted Solution

by:
Daniel Junges earned 2000 total points
ID: 22868192
Create you project with a reference to word2000. Wen distribute you project you have to send the word2000 dlls whit him. It work then for all word versions.
0
 

Author Comment

by:guxiyou
ID: 22868371
How can I do that if I don't have a copy of word 2000 to work with?
0
 
LVL 14

Expert Comment

by:Daniel Junges
ID: 22868425
hm, you have to install word 2000 on you PC and reference the dlls, or take the dlls from other PC and reference it on you project.

regards
junges
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Author Comment

by:guxiyou
ID: 22868527
I assumed as much, thanks!
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