Question

我正在尝试覆盖/编辑excel文件中工作表中的一列，即使它没有引发任何错误，但仍然没有更新excel工作表。

这是我的代码：

Cursor.Current = Cursors.WaitCursor;
string path = Path.Combine(Application.StartupPath, ConfigurationManager.AppSettings["ExportTemplate"]);
oXL = new Microsoft.Office.Interop.Excel.Application();
oXL.Visible = false;
oXL.DisplayAlerts = false;
mWorkBook = oXL.Workbooks.Open(path, 0, false, 5, "", "", false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "", true, false, 0, true, false, false);
//Get all the sheets in the workbook
mWorkSheets = mWorkBook.Worksheets;
//Get the allready exists sheet
mWSheet1 = (Microsoft.Office.Interop.Excel.Worksheet)mWorkSheets.get_Item("MetaData");
Microsoft.Office.Interop.Excel.Range range = mWSheet1.UsedRange;
foreach (Excel.Worksheet oworksheet in mWorkBook.Worksheets)
{
    if (oworksheet.Name == "Disicpline")
    {
        long fullrow = oworksheet.Rows.Count;
        int rowcount = oworksheet.UsedRange.Rows.Count; //get row count
        //long lastrow = oworksheet.Cells[fullrow, 1].get_End(XlDirection.xlUp).Row;
        oworksheet.Cells[rowcount, 1].value = txtDiscCode.Text;
        oworksheet.Cells[rowcount, 2].value = txtDiscplinName.Text;
        oworksheet.Cells[rowcount, 3].value = txtDiscCode.Text + txtDiscplinName.Text;
        oworksheet.Cells[rowcount, 6].value = txtDiscCode.Text;
        oworksheet.Cells[rowcount, 7].value = txtDiscCode.Text;
    }
}
oXL.DisplayAlerts = false;
mWorkBook.SaveAs(path, Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookDefault, Type.Missing, Type.Missing, false, false, Excel.XlSaveAsAccessMode.xlNoChange, Excel.XlSaveConflictResolution.xlLocalSessionChanges, Type.Missing, Type.Missing,
            Type.Missing, Type.Missing);
mWorkBook.Close(true, path, Type.Missing);
Marshal.ReleaseComObject(mWorkBook); 
GC.Collect();
GC.WaitForPendingFinalizers();
oXL.Quit();

Answer 1

文件只是一个文件：您可以使用File.Exist()

if (File.Exists("ExcelFilenameHere"))
{
    File.Delete("ExcelFilenameHere");
}

在保存之前使用它

如何覆盖现有的Excel文件的工作表

1 个答案: