覆盖Excel中没有消息

Question

文件夹中我有以下问题：

我读从Microsoft SQL管理表，并希望将此表导出日常生活与同一个Excel名称的文件夹，这意味着覆盖。

SqlConnection cnn; 
     string connectionString = null; 
     string sql = null; 
     string data = null; 
     int i, j = 0; 

     Excel._Application xlApp; 
     Excel.Workbook xlWorkBook; 
     Excel.Worksheet xlWorkSheet; 
     object misValue = System.Reflection.Missing.Value; 

     xlApp = new Excel.Application(); 
     xlWorkBook = xlApp.Workbooks.Add(misValue); 
     xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1); 

     connectionString = "server=zumtesten;database=LogEMD;user=user123;password=user201611;"; 
     cnn = new SqlConnection(connectionString); 
     cnn.Open(); 
     sql = "SELECT * FROM Flop"; 
     SqlDataAdapter dscmd = new SqlDataAdapter(sql, cnn); 
     DataSet ds = new DataSet(); 
     dscmd.Fill(ds); 

     for (i = 0; i <= ds.Tables[0].Rows.Count - 1; i++) 
     { 
      for (j = 0; j <= ds.Tables[0].Columns.Count - 1; j++) 
      { 
       data = ds.Tables[0].Rows[i].ItemArray[j].ToString(); 
       xlWorkSheet.Cells[i + 1, j + 1] = data; 
      } 
     } 

     xlApp.DisplayAlerts = false; 

     xlWorkBook.SaveAs(@"Y:\\Favoriten\\Flop_N7.xls", Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue); 
     xlWorkBook.Close(true, misValue, misValue); 
     xlApp.Quit(); 

     releaseObject(xlWorkSheet); 
     releaseObject(xlWorkBook); 
     releaseObject(xlApp); 

我已经使用Display.Alerts = false，但MessageBox仍然显示，有人可以帮助我吗？非常感谢！

Answer 1

只需删除该文件：

if (File.Exists(@"Y:\\Favoriten\\Flop_N7.xls")) { 
    File.Delete(@"Y:\\Favoriten\\Flop_N7.xls"); 
}