Question

我想检查excel是否已打开。如果是，我想保存活动工作簿并关闭excel。基本上，我的目标是杀死每个excel进程，但在此之前我想保存excel工作簿。这是我的代码......

Process[] localByName = Process.GetProcessesByName("excel");
        for (int i = 0; i < localByName.Length; i++)
        {
            Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
            Workbook wb = xlApp.ActiveWorkbook; 
            wb.Save();  // I get an error here. "Object reference not set to an instance of an object".
            GC.Collect();
            GC.WaitForPendingFinalizers();
            wb.Close(); 
            Marshal.FinalReleaseComObject(wb);  
            xlApp.Quit();    
            Marshal.FinalReleaseComObject(xlApp);    
        }

我读到xlApp.ActiveWorkbook以只读模式获取工作簿。这可能是我的问题吗？如果是这样，请提出一个成功的方法来解决这个问题。谢谢！

Answer 1

＆GT; Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application（）; 这将创建Excel.Application COM对象的新实例，并且不返回活动实例。为此，请尝试

Excel.Application xlApp = null;
while(xlApp == null)
{
    try
    {
        xlApp = (Excel.Application)System.Runtime.InteropServices.Marshal.GetActiveObject("Excel.Application");
    }
    catch (System.Runtime.InteropServices.COMException ex)
    {
        // no more instances/error, exit out of loop
        break;
    }

    // do whatever with the instance
    Workbook wb = xlApp.ActiveWorkbook; 
    wb.Save();
    GC.Collect();
    GC.WaitForPendingFinalizers();
    wb.Close(); 
    Marshal.FinalReleaseComObject(wb);  
    xlApp.Quit();    
    Marshal.FinalReleaseComObject(xlApp);

    // set null to continue loop
    xlApp = null;
}

来源：Get instance of Excel application with C# by Handle

如何检查Excel是否已打开，如果是，请保存并关闭它C＃

1 个答案: