TECHNOLOGIES
FORUMS
JOBS
BOOKS
EVENTS
INTERVIEWS
Live
MORE
LEARN
Training
CAREER
MEMBERS
VIDEOS
NEWS
BLOGS
Sign Up
Login
No unread comment.
View All Comments
No unread message.
View All Messages
No unread notification.
View All Notifications
Answers
Post
An Article
A Blog
A News
A Video
An EBook
An Interview Question
Ask Question
Forums
Monthly Leaders
Forum guidelines
Masoud A
NA
30
18.9k
[C#] Processing on Data (Excel)
Sep 3 2015 10:24 PM
Greetings
I am trying to delete a row from excel file, however it keeps giving me " System.NullReferenceException was unhandled", Can you please look at my code? thank you.
private void btRun_Click(object sender, EventArgs e)
{
public Excel.Application _app;
public Excel.Workbooks _books;
public Excel.Workbook _book;
public Excel.Sheets _sheets;
public Excel.Worksheet _sheet;
Rows a = new Rows();
a.OpenExcelWorkbook(label2.Text);
_sheet = (Excel.Worksheet)_sheets[1];
// i get the "
System.NullReferenceException was unhandled
" here
_sheet.Select(Type.Missing);
Excel.Range range = _sheet.get_Range("A1:A1", Type.Missing);
range.Delete(Excel.XlDeleteShiftDirection.xlShiftUp);
a.NAR(range);
a.NAR(_sheet);
a.CloseExcelWorkbook();
a.NAR(_book);
_app.Quit();
a.NAR(_app);
}
And
class Rows
{
public Excel.Application _app;
public Excel.Workbooks _books;
public Excel.Workbook _book;
public Excel.Sheets _sheets;
public Excel.Worksheet _sheet;
public void OpenExcelWorkbook(string fileName)
{
_app = new Excel.Application();
if (_book == null)
{
_books = _app.Workbooks;
_book = _books.Open(fileName, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
_sheets = _book.Worksheets;
}
}
public void CloseExcelWorkbook()
{
_book.Save();
_book.Close(false, Type.Missing, Type.Missing);
}
public void NAR(object o)
{
try
{
if (o != null)
System.Runtime.InteropServices.Marshal.ReleaseComObject(o);
}
finally
{
o = null;
}
}
}
Reply
Answers (
3
)
my doubt is all about microsoft default plugins.
GetForegroundWindow(); with docs.ActiveWindow.Selection.Font