Excel一次性大量数据快速写入

///

/// Excel一次性大量数据快速写入
///

/// 工作薄路径
/// 要写入的工作表名字
private void WriteExcel(string path,string sheetName)
{
Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
app.Visible = false; //不显示EXCEL
app.DisplayAlerts = false; //不提示信息
app.ScreenUpdating = false; //停止更新屏幕，加快速度
Workbooks wbs = app.Workbooks; //获取工作薄
_Workbook wb = wbs.Open(path); //打开文件
Sheets shs = wb.Worksheets; //文件中的Sheets
System.Data.DataTable table = getDataTable();//调用getDataTable()方法获取DataTable内存表
CopyDataToSheet(table, shs[sheetName]); //调用方法，将DataTable里的数据写入到Sheet中

        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);
    }