C＃如何使用Interop从Excel读取和写入数据，而不显示Excel？

Question

When opening a workbook from 2 .xls files, the workbooks become visible in the background. This is undesirable in general as it does not look nice, but it also slows down the program.

Questions regarding this have been asked before, but none of the answers solved the problem. The way I am reading data from the .xls file is as follows;

xlApp = new Microsoft.Office.Interop.Excel.Application();
xlWorkbook1 = xlApp.Workbooks.Open(path1);
xlWorksheet1 = (Microsoft.Office.Interop.Excel.Worksheet) xlWorkbook1.Worksheets.get_Item(1);
xlWorkbook2 = xlApp.Workbooks.Open(path2);
xlWorksheet2 = (Microsoft.Office.Interop.Excel.Worksheet) xlWorkbook2.Worksheets.get_Item(1);

I have tried the following ways to open the workbooks, while preventing them from becoming visible;

1.

xlApp = new Microsoft.Office.Interop.Excel.Application() { Visible = false };
xlWorkbook1 = xlApp.Workbooks.Open(path1);
xlWorksheet1 = (Microsoft.Office.Interop.Excel.Worksheet) xlWorkbook1.Worksheets.get_Item(1);
xlWorkbook2 = xlApp.Workbooks.Open(path2);
xlWorksheet2 = (Microsoft.Office.Interop.Excel.Worksheet) xlWorkbook2.Worksheets.get_Item(1);

2.

xlApp = new Microsoft.Office.Interop.Excel.Application();
xlApp.Visible = false;
xlApp.DisplayAlerts = false;
xlWorkbook1 = xlApp.Workbooks.Open(path1);
xlWorksheet1 = (Microsoft.Office.Interop.Excel.Worksheet) xlWorkbook1.Worksheets.get_Item(1);
xlWorkbook2 = xlApp.Workbooks.Open(path2);
xlWorksheet2 = (Microsoft.Office.Interop.Excel.Worksheet) xlWorkbook2.Worksheets.get_Item(1);

3.

xlApp = new Microsoft.Office.Interop.Excel.Application();
xlWorkbook1 = xlApp.Workbooks.Open(path1);
xlWorksheet1 = (Microsoft.Office.Interop.Excel.Worksheet) xlWorkbook1.Worksheets.get_Item(1);
xlWorkbook2 = xlApp.Workbooks.Open(path2);
xlWorksheet2 = (Microsoft.Office.Interop.Excel.Worksheet) xlWorkbook2.Worksheets.get_Item(1);
xlApp.Visible = false;
xlApp.DisplayAlerts = false;

Method 3 does hide the workbooks, but they are opened first and therefore does not solve the problem. I have also tried to open the workbooks as read-only, but that does not seem to make a difference. I need to be able to write to the workbooks as well, so opening them as read-only is no option. It did not fix the problem anyway, but I'm just stating it so it will not be suggested as the solution.

Does anyone know how to achieve the desired behavior?

NOTE: I am using Windows 10.

Answer 1

I used the NetOffice.ExcelApi for reading Excel files. I created a class for this. This should not show the Excel file or Excel itself. Don't forget to close and dispose the file, otherwise Excel will keep running in the background and that could crash your PC.

using NetOffice.ExcelApi;

public class ExcelFile
{
    private Application _excelApp;
    private readonly Workbook _workbook;
    private Range _range;

    private ExcelFile(string path)
    {
        _excelApp = new Application();
        _workbook = _excelApp.Workbooks.Open(path);
    }

    private void CloseFile()
    {
        _workbook.Close(0);
        _excelApp.Quit();
        _excelApp.Dispose();
    }
}

Answer 2

Apparently, the file was in sharing mode and this made the file show up. I have turned sharing mode off and now its fixed.

Answer 3

xlApp.Visible = false;

尝试使用此代码