Excel释放进程

/// <summary>
/// 
/// </summary>
private Excel.ApplicationClass m_xApp;

private Excel.Workbooks m_xBooks;

private Excel.Workbook m_xBook;
/// <summary>
/// 当前活动
/// </summary>
private Excel.Worksheet m_xSheet;
/// <summary>
/// Excel单元格集合
/// </summary>
private Excel.Range m_xRange;
/// <summary>
/// 缺少Object
/// </summary>
private object m_Missing = Missing.Value;

C# code

/// <summary>
/// 释放所引用的COM对象。注意：这个过程一定要执行。
/// </summary>
public void Dispose()
{
    Release(m_xSheet);
    Release(m_xBook);
    Release(m_xBooks);
    //Release(m_xApp);
    KillSpecialExcel();
    System.GC.Collect();
    System.GC.WaitForPendingFinalizers();
}
/// <summary>
/// 释放对象，内部调用
/// </summary>
/// <param name="o">将释放的对象</param>
private void Release(object o)
{
    try
    {
        System.Runtime.InteropServices.Marshal.ReleaseComObject(o);
    }
    catch
    { }
    finally { o = null; }
}
[DllImport("user32.dll", SetLastError = true)]
static extern int GetWindowThreadProcessId(IntPtr hWnd, out int lpdwProcessId);
/// <summary>
/// 找到Excel的进程ID,然后杀死这个进程
/// </summary>
public void KillSpecialExcel()
{
    try
    {
        if (m_xApp != null)
        {
            int lpdwProcessId;
            IntPtr intPtr = new IntPtr(m_xApp.Hwnd);
            GetWindowThreadProcessId(intPtr, out lpdwProcessId);

            System.Diagnostics.Process.GetProcessById(lpdwProcessId).Kill();
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine("Delete Excel Process Error:" + ex.Message);
    }
}