Hi, I've written an application to do a while bunch of Excel automation.
I open a file, scan through all the worksheets, extract data, and then I
try to close Excel. However, I can see that I'm not doing it
effectively. If I am debugging my app, and I kill the app before my app
exits, but after the call that should close excel, I still have an
excell process sitting around. After about 20 + of those stack up, you
start to feel it.
If I quit all the way out of my app, somehow Excel DOES get cleaned up
and the instance / process is closed.
So, how do I properly close an instance of excel?
Thank you!
Currently doing it this way:
public void ExtractDataFromExcel(string fileName)
{
// Instantiate an Excel control object
ExcelObj = new Excel.Application();
// Disable alert messages
ExcelObj.DisplayAlerts = false;
// See if the Excel Application Object was successfully constructed
if (ExcelObj == null)
{
MessageBox.Show("ERROR: EXCEL couldn't be started!");
System.Windows.Forms.Application.Exit();
}
theWorkbook = ExcelObj.Workbooks.Open(
fileName, // Filename
0, // Update links
true, // Read only
5, // Format
"", // Password
"", // Write res password
true, // Ignore read-only recommend
Excel.XlPlatform.xlWindows, // Origin
"\t", // Delimiter (\t = tab delimited)
false, // Editable
false, // Notify
0, // Converter
false, // AddToMru
0, // Local
true // Corrupt load
);
// get the collection of sheets in the workbook
sheets = theWorkbook.Worksheets;
{ ... do some work ... }
// Close Excel workbook
theWorkbook.Close(false, fileName, 0);
object saveChanges = Missing.Value;
object originalFormat = Missing.Value;
object routeDocument = Missing.Value;
ExcelObj.Quit(); // ref saveChanges, ref originalFormat, ref
routeDocument);
} // end of method
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