ExcelHelper（Excel和C#、asp.net导入导出，通用类）（一）

http://blog.163.com/it_software/blog/static/1238582962010518113421381/

using System;

using System.IO;

using System.Text;

using System.Data;

using System.Reflection;

using System.Diagnostics;

using System.Collections;

//using cfg = System.Configuration;

namespace GDBI.Common

{

/// <summary>

/// 说 明：Excel输出打印模块

/// 暂时不提供操作Excel对象样式方法，样式可以在Excel模板中设置好

/// 作 者：lingyun_k

/// 创建日期：2005－7－12

/// </summary>

public class ExcelHelper

{

#region 成员变量

private string templetFile = null;

private string outputFile = null;

private object missing = Missing.Value;

private DateTime beforeTime; //Excel启动之前时间

private DateTime afterTime; //Excel启动之后时间

Excel.Application app;

Excel.Workbook workBook;

Excel.Worksheet workSheet;

Excel.Range range;

Excel.Range range1;

Excel.Range range2;

Excel.TextBox textBox;

private int sheetCount = 1; //WorkSheet数量

private string sheetPrefixName = "页";

#endregion

#region 公共属性

/// <summary>

/// WorkSheet前缀名，比如：前缀名为“页”，那么WorkSheet名称依次为“页-1，页-2...”

/// </summary>

public string SheetPrefixName

{

set { this.sheetPrefixName = value; }

}

/// <summary>

/// WorkSheet数量

/// </summary>

public int WorkSheetCount

{

get { return workBook.Sheets.Count; }

}

/// <summary>

/// Excel模板文件路径

/// </summary>

public string TempletFilePath

{

set { this.templetFile = value; }

}

/// <summary>

/// 输出Excel文件路径

/// </summary>

public string OutputFilePath

{

set { this.outputFile = value; }

}

#endregion

#region 公共方法

#region ExcelHelper

/// <summary>

/// 构造函数，将一个已有Excel工作簿作为模板，并指定输出路径

/// </summary>

/// <param name="templetFilePath">Excel模板文件路径</param>

/// <param name="outputFilePath">输出Excel文件路径</param>

public ExcelHelper(string templetFilePath,string outputFilePath)

{

if(templetFilePath == null)

throw new Exception("Excel模板文件路径不能为空！");

if(outputFilePath == null)

throw new Exception("输出Excel文件路径不能为空！");

if(!File.Exists(templetFilePath))

throw new Exception("指定路径的Excel模板文件不存在！");

this.templetFile = templetFilePath;

this.outputFile = outputFilePath;

//创建一个Application对象并使其可见

beforeTime = DateTime.Now;

app = new Excel.ApplicationClass();

app.Visible = true;

afterTime = DateTime.Now;

//打开模板文件，得到WorkBook对象

workBook = app.Workbooks.Open(templetFile,missing,missing,missing,missing,missing,

missing,missing,missing,missing,missing,missing,missing);

//得到WorkSheet对象

workSheet = (Excel.Worksheet)workBook.Sheets.get_Item(1);

}

/// <summary>

/// 构造函数，打开一个已有的工作簿

/// </summary>

/// <param name="fileName">Excel文件名</param>

public ExcelHelper(string fileName)

{

if(!File.Exists(fileName))

throw new Exception("指定路径的Excel文件不存在！");

//创建一个Application对象并使其可见

beforeTime = DateTime.Now;

app = new Excel.ApplicationClass();

app.Visible = true;

afterTime = DateTime.Now;

//打开一个WorkBook

workBook = app.Workbooks.Open(fileName,

Type.Missing, Type.Missing, Type.Missing, Type.Missing,

Type.Missing, Type.Missing, Type.Missing, Type.Missing,

Type.Missing, Type.Missing, Type.Missing, Type.Missing);

//得到WorkSheet对象

workSheet = (Excel.Worksheet)workBook.Sheets.get_Item(1);

}

/// <summary>

/// 构造函数，新建一个工作簿

/// </summary>

public ExcelHelper()

{

//创建一个Application对象并使其可见

beforeTime = DateTime.Now;

app = new Excel.ApplicationClass();

app.Visible = true;

afterTime = DateTime.Now;

//新建一个WorkBook

workBook = app.Workbooks.Add(Type.Missing);

//得到WorkSheet对象

workSheet = (Excel.Worksheet)workBook.Sheets.get_Item(1);

}

#endregion

#region Data Export Methods

/// <summary>

/// 将DataTable数据写入Excel文件（自动分页）

/// </summary>

/// <param name="dt">DataTable</param>

/// <param name="rows">每个WorkSheet写入多少行数据</param>

/// <param name="top">表格数据起始行索引</param>

/// <param name="left">表格数据起始列索引</param>

public void DataTableToExcel(DataTable dt,int rows,int top,int left)

{

int rowCount = dt.Rows.Count; //DataTable行数

int colCount = dt.Columns.Count; //DataTable列数

sheetCount = this.GetSheetCount(rowCount,rows); //WorkSheet个数

// StringBuilder sb;

//复制sheetCount-1个WorkSheet对象

for(int i=1;i<sheetCount;i++)

{

workSheet = (Excel.Worksheet)workBook.Worksheets.get_Item(i);

workSheet.Copy(missing,workBook.Worksheets[i]);

}

for(int i=1;i<=sheetCount;i++)

{

int startRow = (i - 1) * rows; //记录起始行索引

int endRow = i * rows; //记录结束行索引

//若是最后一个WorkSheet，那么记录结束行索引为源DataTable行数

if(i == sheetCount)

endRow = rowCount;

//获取要写入数据的WorkSheet对象，并重命名

workSheet = (Excel.Worksheet)workBook.Worksheets.get_Item(i);

workSheet.Name = sheetPrefixName + "-" + i.ToString();

//将dt中的数据写入WorkSheet

// for(int j=0;j<endRow-startRow;j++)

// {

// for(int k=0;k<colCount;k++)

// {

// workSheet.Cells[top + j,left + k] = dt.Rows[startRow + j][k].ToString();

// }

// }

//利用二维数组批量写入

int row = endRow-startRow;

string[,] ss = new string[row,colCount];

for(int j=0;j<row;j++)

{

for(int k=0;k<colCount;k++)

{

ss[j,k] = dt.Rows[startRow + j][k].ToString();

}

}

range = (Excel.Range)workSheet.Cells[top,left];

range = range.get_Resize(row,colCount);

range.Value = ss;

#region 利用Windwo粘贴板批量拷贝数据（在Web下面行不通）

/*sb = new StringBuilder();

for(int j=0;j<endRow-startRow;j++)

{

for(int k=0;k<colCount;k++)

{

sb.Append( dt.Rows[startRow + j][k].ToString() );

sb.Append("\t");

}

sb.Append("\n");

}

System.Windows.Forms.Clipboard.SetDataObject(sb.ToString());

range = (Excel.Range)workSheet.Cells[top,left];

workSheet.Paste(range,false);*/

#endregion

}

}