dataset导成excel输出

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Windows.Forms;
using System.Reflection;

namespace DMS
{
/// <summary>
/// C#操作Excel类
/// </summary>
class ExcelOperate
{
//法一
//public bool DataSetToExcel(DataSet dataSet, bool isShowExcle)
//{
//    DataTable dataTable = dataSet.Tables[0];
//    int rowNumber = dataTable.Rows.Count;
//    int columnNumber = dataTable.Columns.Count;

//    if (rowNumber == 0)
//    {
//        MessageBox.Show("没有任何数据可以导入到Excel文件！");
//        return false;
//    }

//    //建立Excel对象
//    Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
//    excel.Application.Workbooks.Add(true);
//    excel.Visible = isShowExcle;//是否打开该Excel文件

//    //填充数据
//    for (int c = 0; c < rowNumber; c++)
//    {
//        for (int j = 0; j < columnNumber; j++)

/        {
//            excel.Cells[c + 1, j + 1] = dataTable.Rows[c].ItemArray[j];
//        }
//    }

//    return true;
//}

//法二
//public bool DataSetToExcel(DataSet dataSet, bool isShowExcle)
//{
//    DataTable dataTable = dataSet.Tables[0];
//    int rowNumber = dataTable.Rows.Count;

//    int rowIndex = 1;
//    int colIndex = 0;

//    if (rowNumber == 0)
//    {
//        return false;
//    }

//    //建立Excel对象
//    Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
//    excel.Application.Workbooks.Add(true);
//    excel.Visible = isShowExcle;

//    //生成字段名称
//    foreach (DataColumn col in dataTable.Columns)
//    {
//        colIndex++;
//        excel.Cells[1, colIndex] = col.ColumnName;
//    }

/    //填充数据
//    foreach (DataRow row in dataTable.Rows)
//    {
//        rowIndex++;
//        colIndex = 0;
//        foreach (DataColumn col in dataTable.Columns)
//        {
//            colIndex++;
//            excel.Cells[rowIndex, colIndex] = row[col.ColumnName];
//        }
//    }

//    return true;
//}

//法三（速度最快）
/// <summary>
/// 将数据集中的数据导出到EXCEL文件
/// </summary>
/// <param name="dataSet">输入数据集</param>
/// <param name="isShowExcle">是否显示该EXCEL文件</param>
/// <returns></returns>
public bool DataSetToExcel(DataSet dataSet, bool isShowExcle)
{
DataTable dataTable = dataSet.Tables[0];
int rowNumber = dataTable.Rows.Count;//不包括字段名
int columnNumber = dataTable.Columns.Count;
int colIndex = 0;

if (rowNumber == 0)
{
return false;
}

//建立Excel对象
Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
//excel.Application.Workbooks.Add(true);

Microsoft.Office.Interop.Excel.Workbook workbook = excel.Workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];
excel.Visible = isShowExcle;
//Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)excel.Worksheets[1];
Microsoft.Office.Interop.Excel.Range range;

//生成字段名称
foreach (DataColumn col in dataTable.Columns)
{
colIndex++;
excel.Cells[1, colIndex] = col.ColumnName;
}

object[,] objData = new object[rowNumber, columnNumber];

for (int r = 0; r < rowNumber; r++)
{
for (int c = 0; c < columnNumber; c++)
{
objData[r, c] = dataTable.Rows[r][c];
}
//Application.DoEvents();
}

// 写入Excel
range = worksheet.get_Range(excel.Cells[2, 1], excel.Cells[rowNumber + 1, columnNumber]);
//range.NumberFormat = "@";//设置单元格为文本格式
range.Value2 = objData;
worksheet.get_Range(excel.Cells[2, 1], excel.Cells[rowNumber + 1, 1]).NumberFormat = "yyyy-m-d h:mm";

return true;
}

//法四
//public bool DataSetToExcel(DataSet dataSet, bool isShowExcle)
//{
//    DataTable dataTable = dataSet.Tables[0];

/    int rowNumber = dataTable.Rows.Count;
//    int columnNumber = dataTable.Columns.Count;
//    String stringBuffer = "";

//    if (rowNumber == 0)
//    {
//        MessageBox.Show("没有任何数据可以导入到Excel文件！");
//        return false;
//    }

//    //建立Excel对象
//    Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
//    excel.Application.Workbooks.Add(true);
//    excel.Visible = isShowExcle;//是否打开该Excel文件

//    //填充数据
//    for (int i = 0; i < rowNumber; i++)
//    {
//        for (int j = 0; j < columnNumber; j++)
//        {
//            stringBuffer += dataTable.Rows[i].ItemArray[j].ToString();
//            if (j < columnNumber - 1)
//            {
//                stringBuffer += "\t";
//            }
//        }
//        stringBuffer += "\n";
//    }
//    Clipboard.Clear();
//    Clipboard.SetDataObject(stringBuffer);
//    ((Microsoft.Office.Interop.Excel.Range)excel.Cells[1, 1]).Select();
//    ((Microsoft.Office.Interop.Excel.Worksheet)excel.ActiveWorkbook.ActiveSheet).Paste(Missing.Value, Missing.Value);
//    Clipboard.Clear();

//    return true;
//}