Excel one-time write large amounts of data quickly

///

/// Excel one-time write large amounts of data quickly
///

/// workbook path
/// to write the name of the worksheet
Private void WriteExcel (path String, String sheetName)
{
Microsoft.Office.Interop.Excel.Application new new Microsoft.Office.Interop.Excel.Application App = () ;
app.Visible = false; // do not show EXCEL
app.DisplayAlerts = false; // no message
app.ScreenUpdating = false; // stop updating the screen, speed up
workbooks wbs = app.Workbooks; // get the workbook
_Workbook wb = wbs.Open (path); // open file
Sheets shs = wb.Worksheets; Sheets // file
System.Data.DataTable table = getDataTable (); // call getDataTable () method to get the memory table DataTable
CopyDataToSheet ( table, shs [sheetName]); // call the method, the data is written into DataTable in the Sheet

        wb.Save(); //保存
        wb.Close(); //关闭工作薄
        app.Quit(); //关闭EXCEL
        MessageBox.Show("OK");
    }

    //快速写入（先写入数组，然后一次性将数组写入到EXCEL中）
    private void CopyDataToSheet(System.Data.DataTable Table, _Worksheet Sheet)
    {
        int colCount, rowCount;
        colCount = Table.Columns.Count;
        rowCount = Table.Rows.Count;
        Range range;

        //写入标题行
        range = Sheet.get_Range("A1", Missing.Value);
        range = range.get_Resize(1, colCount);
        object[,] headerData = new object[1, colCount];
        for (int iCol = 0; iCol < colCount; iCol++)
        {
            headerData[0, iCol] = Table.Columns[iCol].ColumnName;
        }
        range.set_Value(Missing.Value, headerData);

        //写入数据行
        range = Sheet.get_Range("A2", Missing.Value);
        range = range.get_Resize(rowCount, colCount);
        object[,] cellData = new object[rowCount, colCount];
        for (int iRow = 0; iRow < rowCount; iRow++)
        {
            for (int iCol = 0; iCol < colCount; iCol++)
            {
                cellData[iRow, iCol] = Table.Rows[iRow][iCol].ToString();
            }
        }
        range.set_Value(Missing.Value, cellData);
    }