c#后台如何导出excel到本地_C#导出EXCEL的几种方法

using System;

using System.Collections.Generic;

using System.Text;

using System.Data;

using System.Windows.Forms;

using System.Reflection;

namespace DMS

{

///

/// C#操作Excel类

///

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)

///

/// 将数据集中的数据导出到EXCEL文件

///

/// 输入数据集

/// 是否显示该EXCEL文件

///

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;

//}

//public bool DataSetToExcel(DataSet dataSet, string fileName, 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();

//    Microsoft.Office.Interop.Excel.Workbook workBook = excel.Application.Workbooks.Add(true);

//    excel.Visible = false;//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++)

//        {

//            excel.Cells[i + 1, j + 1] = dataTable.Rows[i].ItemArray[j];

//        }

//    }

//    //string fileName = path + "\\" + DateTime.Now.ToString().Replace(':', '_') + ".xls";

//    workBook.SaveAs(fileName, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);

//    try

//    {

//        workBook.Saved = true;

//        excel.UserControl = false;

//        //excelapp.Quit();

//    }

//    catch (Exception exception)

//    {

//        MessageBox.Show(exception.Message);

//    }

//    finally

//    {

//        workBook.Close(Microsoft.Office.Interop.Excel.XlSaveAction.xlSaveChanges, Missing.Value, Missing.Value);

//        excel.Quit();

//    }

//    if (isShowExcle)

//    {

//        System.Diagnostics.Process.Start(fileName);

//    }

//    return true;

//}

//public bool DataSetToExcel(DataSet dataSet, string fileName, 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)

//    {

//        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);

//    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];

//    worksheet.Name = "挠度数据";

//    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";

//    //string fileName = path + "\\" + DateTime.Now.ToString().Replace(':', '_') + ".xls";

//    workbook.SaveAs(fileName, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);

//    try

//    {

//        workbook.Saved = true;

//        excel.UserControl = false;

//        //excelapp.Quit();

//    }

//    catch (Exception exception)

//    {

//        MessageBox.Show(exception.Message);

//    }

//    finally

//    {

//        workbook.Close(Microsoft.Office.Interop.Excel.XlSaveAction.xlSaveChanges, Missing.Value, Missing.Value);

//        excel.Quit();

//    }

//    //if (isShowExcle)

//    //{

//    //    System.Diagnostics.Process.Start(fileName);

//    //}

//    return true;

//}

///

/// 将数据集中的数据保存到EXCEL文件

///

/// 输入数据集

/// 保存EXCEL文件的绝对路径名

/// 是否打开EXCEL文件

///

public bool DataSetToExcel(DataSet dataSet, string fileName, 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)

{

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);

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 = false;

//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";

//string fileName = path + "\\" + DateTime.Now.ToString().Replace(':', '_') + ".xls";

workbook.SaveAs(fileName, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);

try

{

workbook.Saved = true;

excel.UserControl = false;

//excelapp.Quit();

}

catch (Exception exception)

{

MessageBox.Show(exception.Message);

}

finally

{

workbook.Close(Microsoft.Office.Interop.Excel.XlSaveAction.xlSaveChanges, Missing.Value, Missing.Value);

excel.Quit();

}

if (isShowExcle)

{

System.Diagnostics.Process.Start(fileName);

}

return true;

}

}

}