使用C＃和Excel Interop

Question

I have this code:

Microsoft.Office.Interop.Excel.Application xla = new Microsoft.Office.Interop.Excel.Application();
xla.Visible = false;
Workbook wb = xla.Workbooks.Add(XlSheetType.xlWorksheet);
Worksheet ws = (Worksheet)xla.ActiveSheet;
ws.Name = "Serial";
int i = 1;
foreach (DataRow comp in dsView.Tables[0].Rows)
{
    ws.Cells[i, 1] = "'" + comp[0].ToString();
    ws.Cells[i, 2] = "'" + comp[1].ToString();
    ws.Cells[i, 3] = "'" + comp[2].ToString();
    i++;
}
if (File.Exists(@"d:\DDD.xlsx"))
    File.Delete(@"d:\DDD.xlsx");
xla.Save(@"d:\DDD.xlsx");    ---->>>>  on this line i get the error

The error:

Exception from HRESULT: 0x800A03EC

I am working on C# winforms with Office 2012

Answer 1

Your problem is that the variable xla is your excel application and not a workbook. You want to save the workbook.

so

xla.Save(@"d:\DDD.xlsx");    ---->>>>  on this line i get the error

should be

wb.SaveAs(@"d:\DDD.xlsx", System.Reflection.Missing.Value,System.Reflection.Missing.Value,System.Reflection.Missing.Value,
                System.Reflection.Missing.Value,System.Reflection.Missing.Value,Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange,System.Reflection.Missing.Value,
                System.Reflection.Missing.Value,System.Reflection.Missing.Value,System.Reflection.Missing.Value,System.Reflection.Missing.Value);

Answer 2

When I run Excel.Application.Save() with Visual Studio 2010 and Excel 2010 interop (Office 14) targeting .NET 4, it displays a dialog to select a location to save the file. Clicking Cancel on that dialog results in a COM exception. But clicking Save has odd results: When I supply a valid file path and name as a parameter like Excel.Application.Save(@"C:\\blah.xlsx") , I end up with two files saved. The first is named Sheet1.xlsx and contains what I'd expect, even though I didn't choose that name in the dialog. The other is named blah.xlsx (as per my file name parameter) and won't open correctly in Excel. If I call Excel.Application.Save() without a file name as a parameter, a valid file is saved with the name and path I selected in the dialog, but I also get a "RESUME.XLW" file as well. So it seems that the Application.Save method may not be a good choice to use. Instead, you can do something like this, which works as you'd expect:

using System;
using Excel = Microsoft.Office.Interop.Excel;
namespace WindowsFormsApplication2
{
    static class Program
    {
        static void Main()
        {
            Excel.Application xlApp = new Excel.Application();
            Excel.Workbook book = xlApp.Workbooks.Add(Excel.XlSheetType.xlWorksheet);
            Excel.Worksheet sheet = book.ActiveSheet;
            sheet.Name = "Booya";
            Excel.Range range = sheet.Cells[1, 1];
            range.Value = "This is some text";
            book.SaveAs(@"C:\blah.xlsx");
        }
    }
}