I use said invocation to release some Excel objects after I'm done. Is it necessary to set references to null afterwards (like in the following code) ?
var dateCol = sheet1.get_Range("C4", "C" + rowOffset);
dateCol.NumberFormat = "Text";
Marshal.ReleaseComObject(dateCol);
dateCol = null;
This is what I always use and it works very well
using Excel = Microsoft.Office.Interop.Excel;
Excel.ApplicationClass _Excel;
Excel.Workbook WB;
Excel.Worksheet WS;
try
{
_Excel = new Microsoft.Office.Interop.Excel.ApplicationClass();
WB = _Excel.Workbooks.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);
//do something
}
catch (Exception ex)
{
WB.Close(false, Type.Missing, Type.Missing);
throw;
}
finally
{
GC.Collect();
GC.WaitForPendingFinalizers();
System.Runtime.InteropServices.Marshal.FinalReleaseComObject(WB);
System.Runtime.InteropServices.Marshal.FinalReleaseComObject(_Excel);
}
Do a
System.Runtime.InteropServices.Marshal.FinalReleaseComObject
On all referenced Excel objects
Related
I am developing a windows form application using C#. In this application the user will click a button then the program will copy some columns and rows from the clipboard and past them on a new excel workbook where user can edit the information.
In Excel, I want to block one column only which is the ID such that the user can edit all cells except
that column because this column is system generated. I am not able to get it working. below is my code
DataObject dataObj = null;
dataGridView1.SelectAll(); // copying data to clipboard
dataObj = dataGridView1.GetClipboardContent(); //
if (dataObj != null)
Clipboard.SetDataObject(dataObj);
object misValue = System.Reflection.Missing.Value;
xlexcel = new Microsoft.Office.Interop.Excel.Application();
xlexcel.DisplayFullScreen = true;
Microsoft.Office.Interop.Excel.Range CR = xlWorkSheet.get_Range("A1", "A1");
CR.Select();
xlWorkSheet.PasteSpecial(CR, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing, false);
// for example block column A only
xlWorkSheet.Range["A1"].EntireColumn.Style.Locked = true;
// protect the sheet
xlWorkSheet.Protect(Type.Missing, true, true, true,
Type.Missing, Type.Missing, true, true, Type.Missing,
Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing);
My problem is that after running this code and then unprotecting the sheet, the user can still edit column A. Is there a way I can protect only column A from editing?
I am using Microsoft.Office.Interop.Excel version 15. and .Net Framework 4.5.1
Any help is really appreciated.
Here try this. I don't exactly know where the issue is occurring but this might help.
DataObject dataObj = null;
dataGridView1.SelectAll(); // copying data to clipboard
dataObj = dataGridView1.GetClipboardContent(); //
if (dataObj != null)
Clipboard.SetDataObject(dataObj);
object misValue = System.Reflection.Missing.Value;
xlexcel = new Microsoft.Office.Interop.Excel.Application();
xlexcel.DisplayFullScreen = true;
Microsoft.Office.Interop.Excel.Range CR = xlWorkSheet.get_Range("A1", "A1");
CR.Select();
xlWorkSheet.PasteSpecial(CR, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing, false);
// for example unblock columns B - Z only
xlWorkSheet.Range("B1", "Z1").EntireColumn.Locked = false;
// protect the sheet
xlWorkSheet.Protect(Type.Missing, true, true, true,
Type.Missing, Type.Missing, true, true, Type.Missing,
Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing);
This is in no way a perfect solution to all your problems. Especially since I don't quite know how many other columns you plan to use, but this code will leave column A locked and then leave B through Z unlocked. If you have any others questions toss them in the comments.
I was wondering if someone can assist me in achieving the C# code below in either EPPlus or OpenOffice XML:
Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
string excelFileName = "Sample.xlsx";
string currentDirectory = Directory.GetCurrentDirectory();
string excelFilePath = System.IO.Path.Combine(currentDirectory, excelFileName);
app.Workbooks.Open(excelFilePath,
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);
string xmlContent = string.Empty;
// Use the map (XSD inside the Excel file)
app.ActiveWorkbook.XmlMaps[1].ExportXml(out xmlContent);
app.Workbooks.Close();
Using Microsoft.Office.Interop.Excel.Application requires installation of Microsoft Office on the server. Is there any way around this other than installing Microsoft Engine?. Basically how to read XMLMap without office.Interop?
Thank you
I working on the Excel in the server and when I trying to open my Excel file with Microsoft.Office.Interop.Excel, I have this error:
Exception de HRESULT : 0x800A03EC
I check my access to my file, and my IIS account have a full control on this. This is my code :
var excelApp = new Excel.Application();
Excel.Workbook workbook = excelApp.Workbooks.Open(
Filepath,
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,
true
);
Thanks
I am opening an existing Excel file with following process:
Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
excel.Visible = true;
Workbook w = excel.Workbooks.Open(#"E:\ishu\Test.xlsx"
, Type.Missing,
true, Type.Missing, Type.Missing,
Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing, Type.Missing,
Type.Missing);
Worksheet ws = (Worksheet)w.Worksheets[1];
Microsoft.Office.Interop.Excel.Range xlRange = ws.UsedRange;
excel.Visible = true;
Excel process gets started in task manager but no Excel window get visible.
This probably isn't the answer you are looking for, but my application uses
System.Diagnostics.Process.Start(ExcelFileToOpen);
The above is run only when the Excel file exists.
I am trying to print a Microsoft Excel document in C# using visual studio and I get a Show method of Dialog class failed exception every time I attempt to execute this piece of code:
bool userDidntCancel =
ExcelApp.Dialogs[Excel.XlBuiltInDialog.xlDialogPrint].Show(
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, 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, Type.Missing, Type.Missing);
Here is the full code I'm using:
Excel.Application ExcelApp = new Excel.Application();
Excel.Workbook wb = ExcelApp.Workbooks.Open(
PATH,
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);
Excel.Worksheet ws = (Excel.Worksheet)wb.Worksheets[1];
try
{
bool userDidntCancel =
ExcelApp.Dialogs[Excel.XlBuiltInDialog.xlDialogPrint].Show(
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, 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, Type.Missing, Type.Missing);
}
catch
{
ExcelApp.Quit();
File.Delete("Container Status.xls");
}
Is there something I'm missing?