Cannot open Excel file in C#

Question

I have the following C# function in my project, which is supposed to open and return an existing Excel workbook object:

Application _excelApp;

// ...

private W         


        

Answer 1

I was running into the same issue and I have investigated infomation about "registry hack".

After all, I found another solution that changes no registry values and everything works on properly.

This solution is ...

・Windows 2008 Server x64

Please make this folder.

  C:\Windows\SysWOW64\config\systemprofile\Desktop

・Windows 2008 Server x86

Please make this folder.

 C:\Windows\System32\config\systemprofile\Desktop

...instead of dcomcnfg.exe.

This operation took away office automation problems in my system.

A Desktop folder seems to be necessary in the systemprofile folder to open file by Excel.

It disappears from Windows2008, Windows2003 had the folder, and I think it cause this error.

I think it is safer than "registry hack".

If you try this solution, please let me know results.