1.

這個(gè)是調(diào)用IE Mailto 來發(fā)送的,調(diào)用win API
首先要添加引用using System.Runtime.InteropServices;

??? class Mailto?????????????????????? //與我聯(lián)系打開郵箱的類
??? {
??????? [DllImport("shell32.dll", EntryPoint = "ShellExecuteA")]
??????? public static extern int ShellExecute(
???????? int hwnd,
???????? String lpOperation,
???????? String lpFile,
???????? String lpParameters,
???????? String lpDirectory,
???????? int nShowCmd
???????? );

??? }

?? private void call_me_Click(object sender, EventArgs e)//在菜單的單擊事件中調(diào)用方法
????? {
????????? Mailto.ShellExecute(0, String.Empty, "mailto:vcool011@hotmail.com?subject=這是標(biāo)題哦&body=這是文本內(nèi)容啊！！！！！！！！！ C:\\avatar.xml", String.Empty, String.Empty, 1);
????? }

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2 調(diào)用 IE方法
?????????? System.Diagnostics.Process.Start("mailto:abc@sina.com");
或
?????????? System.Diagnostics.Process.Start("mailto:liuyi.aspnet@163.com?subject=這是標(biāo)題哦&body=這是文本內(nèi)容啊！！！！！！！！！");

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前面二種都不能添加附件發(fā)送

下面是可以添加附件發(fā)送的

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3

引用MSMAPI32.OCX 來實(shí)現(xiàn),可添加附件

　　　　　　MAPISession MAPIS1 = new MAPISession();
??????????????? MAPIMessagesClass MAPIM1 = new MAPIMessagesClass();
??????????????? MAPIS1.NewSession = true;
??????????????? MAPIS1.LogonUI = false;
??????????????? MAPIS1.DownLoadMail = false;

??????????????? string m_path;
??????????????? string m_file_name;
??????????????? string m_file;

??????????????? m_path = "c:\\";

??????????????? m_file_name = "Log.txt";
??????????????? m_file = m_path + m_file_name;

??????????????? MAPIS1.SignOn();

??????????????? MAPIM1.SessionID = MAPIS1.SessionID;
??????????????? MAPIM1.Compose();

??????????????? MAPIM1.AddressResolveUI = true;
??????????????? MAPIM1.AttachmentIndex = 0;

??????????????? MAPIM1.AttachmentPathName = m_file;
??????????????? MAPIM1.AttachmentName = m_file_name;

??????????????? MAPIM1.MsgSubject = "The Title ";
??????????????? MAPIM1.MsgNoteText = "The Body ";

??????????????? MAPIM1.Send(true);

??????????????? MAPIS1.SignOff();

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