转自：http://www.cnblogs.com/madebychina/archive/2011/09/20/madebychina_2.html
C#使用如下代码调用Outlook2003发送邮件：
// Create the Outlook application.
Outlook.Application oApp = new Outlook.Application();
//Outlook.ApplicationClass oApp = new Outlook.ApplicationClass();
// Get the NameSpace and Logon information.
Outlook.NameSpace oNS = oApp.GetNamespace("mapi");
// Log on by using a dialog box to choose the profile.
oNS.Logon(Missing.Value, Missing.Value, true, true);
// Alternate logon method that uses a specific profile.
// TODO: If you use this logon method,
// change the profile name to an appropriate value.
//oNS.Logon("YourValidProfile", Missing.Value, false, true);
// Create a new mail item.
Outlook.MailItem oMsg = (Outlook.MailItem)oApp.CreateItem(Outlook.OlItemType.olMailItem);
// Set the subject.
oMsg.Subject = "mail";
//oMsg.Attachments.Add("C:\mailLog.txt", Outlook.OlItemType.olMailItem, 1, "report");
// Set HTMLBody.
String sHtml;
sHtml = "<HTML>
" +
"<HEAD>
" +
"<TITLE>Sample GIF</TITLE>
" +
"</HEAD>
" +
"<BODY><P>
" +
"<h1><Font Color=Green>Inline graphics</Font></h1></P>
" +
"</BODY>
" +
"</HTML>";
oMsg.HTMLBody = sHtml;
// Add a recipient.
Outlook.Recipients oRecips = (Outlook.Recipients)oMsg.Recipients;
// TODO: Change the recipient in the next line if necessary.
string reciMailAdress=this.txtMail.Text;
Outlook.Recipient oRecip = (Outlook.Recipient)oRecips.Add(reciMailAdress);
oRecip.Resolve();
// Send.
oMsg.Send();
//((Microsoft.Office.Interop.Outlook._MailItem)oMsg).Send();
// Log off.
oNS.Logoff();
// Clean up.
oRecip = null;
oRecips = null;
oMsg = null;
oNS = null;
oApp = null;
但是因为Outlook2003的安全机制，总是会弹出安全提示对话框，如下：
而且在我们选择允许访问，点击“是”按钮后还会弹出另外一个对话框，如下：
并且“是”按钮还会被冻结5秒钟。分析原因是我们使用的是Outlook.MailItem邮件模式，这是一种非安全的模式，所以在第三方程序调用Outlook2003时会弹出确认对话框，如何来避免弹出安全提示对话框呢？我们可以使用SafeMailItem模式。但是在使用这种模式时需要引用Redemption.dll，而且还要安装Redemption插件，代码如下：
private void Send()
{
Outlook.Application olApp = new Outlook.ApplicationClass();
Outlook.NameSpace olNS = olApp.GetNamespace("MAPI");
olNS.Logon(Missing.Value, Missing.Value, false, false);
SafeMailItem sItem = new Redemption.SafeMailItem();
Outlook.MailItem olItem = olApp.CreateItem(0) as Outlook.MailItem;
String sHtml;
sHtml = "<HTML>
" +
"<HEAD>
" +
"<TITLE>Sample GIF</TITLE>
" +
"</HEAD>
" +
"<BODY><P>
" +
"<h1><Font Color=Green>Inline graphics</Font></h1></P>
" +
"</BODY>
" +
"</HTML>";
olItem.HTMLBody = sHtml;
sItem.Item = olItem;
string reciMailAdress=txtMail.Text;
sItem.Recipients.Add(reciMailAdress);
sItem.Recipients.ResolveAll();
SetPropValue(sItem, "Subject", "Testing Redemption");
sItem.Send();
}
private static object GetPropValue(object item, string propertyName)
{
try
{
object[] args = new Object[]{}; // dummy argument array
Type type = item.GetType();
return type.InvokeMember(
propertyName,
BindingFlags.Public | BindingFlags.GetField
| BindingFlags.GetProperty,
null,
item,
args);
}
catch (SystemException ex)
{
// Console.WriteLine(
// string.Format(
// "GetPropValue for {0} Exception: {1} ",
// propertyName, ex.Message));
}
return null;
}
private static void SetPropValue(object item, string propertyName,object propertyValue)
{
try
{
object[] args = new Object[1];
args[0] = propertyValue;
Type type = item.GetType();
type.InvokeMember(propertyName,
BindingFlags.Public | BindingFlags.SetField |
BindingFlags.SetProperty,
null,
item,
args);
}
catch (SystemException ex)
{
// Console.WriteLine(
// string.Format(
// "SetPropValue for {0} Exception: {1} ",
// propertyName, ex.Message));
}
return;
}
这样就能避免弹出对话框了，其他高版本的Outlook好像没有此问题，Outlook2007在开启反病毒软件时不会弹出对话框。
Redemption下载地址：http://www.dimastr.com/redemption/download.htm