C# WebBrowser and Excel instance

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Hello,

I use a WebBrowser control to open an Excel file.

The problem is that if there is already an open Excel before, the WebBrowser uses the same instance of Excel (Application).

Is there a method to indicate that the WebBrowser should create a new instance of Excel?

Or is it possible to force (or prevent) new Excel files to open in a specific instance?

thank you

Posted 11-Apr-13 21:37pm

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Maciej Los · Answer 1 · 2013-04-13T10:07:00

If i understand you well...

MS Excel is a single-instance application, which means that Excel will open next file in the same instance. To force creating another instance, using Interop, you need to open it using new keyword.

C#

Excel.Application oExcFirstInstance = new Excel.Application();
Excel.Application oExcSecondInstance = new Excel.Application();

oExcFirstInstance.Workbooks.Open(...);
oExcFirstInstance.Workbooks.Open(...);
oExcFirstInstance.Workbooks.Open(...);

oExcSecondInstance.Workbooks.Open(...);
oExcSecondInstance.Workbooks.Open(...);
oExcSecondInstance.Workbooks.Open(...);