ASP.NET,无法获取已经打开的Excel实例 [英] ASP.NET, Unable to get the Already opened Excel Instance

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问题描述

 功能 IsExcelRunning()作为  Boolean  
Dim xlApp As Excel.Application
错误 恢复 下一步
xlApp = GetObject(, Excel.Application
IsExcelRunning =(Err.Number = 0
xlApp = 没什么
Err.Clear()
结束 功能

功能 OpenExcel()
如果 IsExcelRunning()然后
excelAp p = GetObject(, Excel.Application
Else
excelApp = CreateObject( Excel.Application
结束 如果
结束 函数





上面的代码总是调用CreateObject方法而不是在IIS 6(Windows Server 2008)中托管时的GetObject。但是,在调试模式下,一旦CreateObject方法调用它就调用GetObject。

问题是,每次我们调用OpenExcel函数时,在服务器中打开一个单独的Excel实例。请指导如何避免它。

解决方案

此代码用c#编写。 excelWorkbook对象是当前打开的工作簿的实例。



 Microsoft.Office.Interop.Excel.Workbook excelWorkbook =(Microsoft.Office .Interop.Excel.Workbook)Globals.ThisAddIn.Application.ActiveWorkbook; 


 Function IsExcelRunning() As Boolean
        Dim xlApp As Excel.Application
        On Error Resume Next
        xlApp = GetObject(, "Excel.Application")
        IsExcelRunning = (Err.Number = 0)
        xlApp = Nothing
        Err.Clear()
    End Function

Function OpenExcel ()
If IsExcelRunning() Then
      excelApp = GetObject(, "Excel.Application")
Else
      excelApp = CreateObject("Excel.Application")
End If
End Function



The Above code always calling CreateObject method instead of GetObject when hosted in IIS 6 (Windows Server 2008). However, in debug mode it calls the GetObject once the CreateObject method calls.
The issue is, each time we call the OpenExcel function one separate Excel instance opening in server. Please guide how to avoid it.

解决方案

This code is written in c#. excelWorkbook object is the instance of the currently opened workbook.

Microsoft.Office.Interop.Excel.Workbook excelWorkbook = (Microsoft.Office.Interop.Excel.Workbook)Globals.ThisAddIn.Application.ActiveWorkbook;


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