终止excel.exe的进程

using System.Diagnostics;
using System.Runtime.InteropServices;

/// <summary>
/// 获取进程ID
/// </summary>
/// <param name="hwnd">窗口句柄 由FindWindow获取</param>
/// <param name="ID">进程ID</param>
/// <returns></returns>
[DllImport("User32.dll", CharSet = CharSet.Auto)]
public static extern int GetWindowThreadProcessId(IntPtr hwnd, out int ID);

/// <summary>
/// 关闭Excel进程
/// </summary>
/// <param name="excel"></param>
public void KillExcel(Microsoft.Office.Interop.Excel._Application excel)
{
//获得句柄
IntPtr ptr = new IntPtr(excel.Hwnd);
//获取进程ID
int processID = 0;
GetWindowThreadProcessId(ptr, out processID);
//获取进程
Process process = Process.GetProcessById(processID);
//关闭进程
if (!process.CloseMainWindow())//尝试关闭进程
{
process.Kill();//强制关闭
}
}

public void Dispose()
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(this.worksheet);
this.worksheet = null;
System.Runtime.InteropServices.Marshal.ReleaseComObject(this.workbook);
this.workbook = null;
if (this.application != null)
{
this.application.Quit();

//关闭Excel进程（程序异常关闭的情况下）
this.KillExcel(this.application);

System.Runtime.InteropServices.Marshal.ReleaseComObject(this.application);
this.application = null;
}
}