QueryInterface, with the object Excel.Application

[Dominique MILLOT]

Hello,

With Asp.Net, I try to generat a document with an Excel object.

This is the begin of my procedure:
Dim xapExcel As Excel.Applicati on
xapExcel = New Excel.Applicati on()
xapExcel.Visibl e = False

At the last line I obtain this error:
"System.Invalid CastException: QueryInterface for interface
Excel._Applicat ion failed."

Other clues:
- I have granted AspNet to run Excel (with the tool DComCnfg.exe).
- I use Office XP in english, but the Os and .Net was in french. I have make
some tests without succes by changing CurrentCulture.

Someone have a solution ?

Regards.

[Natty Gur]

Re: QueryInterface, with the object Excel.Applicati on

Hi,
Its better to use tlbimp when you use COM. here a detailed article of
what you are looking for :

http://www.c-sharpcorner.com/Code/2002/Jan/CreateExcelSheetGAG.asp

Natty Gur, CTO
Dao2Com Ltd.
28th Baruch Hirsch st. Bnei-Brak
Israel , 51114

Phone Numbers:
Office: +972-(0)3-5786668
Fax: +972-(0)3-5703475
Mobile: +972-(0)58-888377

Know the overall picture


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[Dominique MILLOT]

Re: QueryInterface, with the object Excel.Applicati on

Thanks for your answer;

tlbimp was certainly usefull for Excel 5, 2000.
But I think we didn't need it for Office XP (2002)

And in add, it was recommanded on every doc I find for C and not for VB.

(Or I didn't understand tlbimp use)

Regards.