How to save excel files using c#

Question

4.00/5 (1 vote)

See more:

Dear all,
I am working on windows application. In this application i am working office 2007. i can open .xlsx file using following code.

C#

Microsoft.Office.Interop.Excel.Application excelApp = new Microsoft.Office.Interop.Excel.ApplicationClass();

excelApp.Visible = true;

Microsoft.Office.Interop.Excel.Workbook excelWorkbook = excelApp.Workbooks.Open(varFileName,0, false, 5, """, """, false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, """,
                true, false, 0, true, false, false);
                Microsoft.Office.Interop.Excel.Worksheet workSheet = (Microsoft.Office.Interop.Excel.Worksheet)excelWorkbook.ActiveSheet;

workSheet.Activate();

After that I will do some modification on same xlsx file.

Now problem start with, when I want to save the file.
I am doing this using following code.

C#

excelApp.ActiveWorkbook.Save();
excelApp.ActiveWorkbook.Close((Object)false, (Object)oMissing, (Object)oMissing);
excelApp.Quit();

It shows exception as Object reference not set to an instance of an object. It will not show any active document. It shows ActiveWorkbook=null;
Any kind of link, suggestion and specially expert advice would be highly appreciated.

Thanks & Regards,
Balkrishna Raut

Posted 30-Dec-10 20:32pm

meBalkrishna

Updated 30-Dec-10 20:45pm

Sandeep Mewara

v2

Add a Solution

Comments

Espen Harlinn 31-Dec-10 6:17am

Why aren't you using excelWorkbook object reference for saving?

Manfred Rudolf Bihy 31-Dec-10 8:04am

@Espen: Good question!

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Manfred Rudolf Bihy · Answer 1 · 2010-12-31T00:20:00

Solution 1

~~Is there a function like Activate() for the workbook. Then~~ You probably need to call excelWorkbook.Activate() to make that workbook the active one.

http://msdn.microsoft.com/en-us/library/microsoft.office.tools.excel.workbook.activate(v=VS.90).aspx[^]

Cheers,

Manfred

Posted 31-Dec-10 0:20am

Manfred Rudolf Bihy

Updated 31-Dec-10 0:25am

v2

Comments

meBalkrishna 31-Dec-10 6:50am

Thanks a lot.

actually the issue was with
Microsoft.Office.Interop.Excel.Application excelApp = new Microsoft.Office.Interop.Excel.ApplicationClass();

it needs to declare it as public variable.
so it can locate active worksheet.

Thanks & Regards,
Balkrishna

K N R · Answer 2 · 2011-05-17T04:31:00

Solution 2

Posted 17-May-11 4:31am

K N R