asp.net(C#) Excel导出类 导出.xls文件

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using Microsoft.Office.Interop.Excel; 
针对office 2003需添加引用Microsoft   Excel   11.0   Object   Library

如添加之后还不能用再using microsoft.office.core和excel

引用的dll为

Interop.Microsoft.Office.Core.dll

Interop.Excel.dll

Excel导出类:

using System;

using System.IO;

using System.Data;

using Microsoft.Office.Interop.Excel;

 

    ///   <summary> 

    ///   导出Excal文件

    ///   </summary> 

public class ImportExcel

{

    private string title;

    private string rpt_name;

    private string outFilePath;

    private System.Data.DataTable dt;

    private System.Data.DataTable outTable;

 

    public ImportExcel()

    {

 

    }

 

    ///   <summary> 

    ///   设置Excel标题 

    ///   </summary> 

    public string rptName

    {

        get

        {

            return title;

        }

        set

        {

            title = value;

        }

    }

 

    ///   <summary> 

    ///   需要导入EXCEL的表 

    ///   </summary> 

    public System.Data.DataTable RptData

    {

        get

        {

            return dt;

        }

        set

        {

            dt = value;

        }

    }

 

    ///   <summary> 

    ///   设置输出文件的存放位置 

    ///   </summary> 

    public string OutFilePath

    {

        get

        {

            return outFilePath;

        }

        set

        {

            outFilePath = value;

        }

    }

 

    ///   <summary> 

    ///   构造函数,使用该类需传入Excel标题,DataTable,文件的存放路径 

    ///   </summary> 

    ///   <param   name="rptName">要设置的Excel标题</param> 

    ///   <param   name="dtable">要填充Excel的表</param> 

    ///   <param   name="FilePath">要存放的路径</param> 

    public ImportExcel(string rptName, System.Data.DataTable dtable, string file_path)

    {

        rpt_name = rptName;

        outTable = dtable;

        outFilePath = file_path;

 

        try

        {

            this.InsertExcel();

        }

        catch (Exception e)

        {

            throw new Exception(e.Message);

        }

    }

 

    ///   <summary> 

    ///   该函数向Excel表中插入记录,要插入的数据为一个内存表.其中内存表中的列名为表中的列名 

    ///   该函数所使用的动态连接库Excel.dll,Office.dll,VBIDE.dll. 

    ///   </summary> 

    public void InsertExcel()

    {

        int col_count = 0;

        int row_count = 0;

        int k = 0;

        int l = 0;

 

        //检查文件是否存在 

        if (File.Exists(outFilePath))

        {

            throw new Exception("文件已存在，创建失败！");

        }

 

        Microsoft.Office.Interop.Excel.ApplicationClass rptApp = new Microsoft.Office.Interop.Excel.ApplicationClass();

 

        rptApp.Application.Workbooks.Add(true);

 

        rptApp.Visible = false;

 

        object missing = System.Reflection.Missing.Value;

 

        Microsoft.Office.Interop.Excel.Workbook rptBook = rptApp.Workbooks[1];

        Microsoft.Office.Interop.Excel.Worksheet rptSheet = (Microsoft.Office.Interop.Excel.Worksheet)rptBook.ActiveSheet;

 

 

        //设置报表的标题 

        rptSheet.Cells[1, 1] = rpt_name;

 

        //插入列标题 

        foreach (DataColumn col in outTable.Columns)

        {

            col_count++;

            rptSheet.Cells[2, col_count] = col.ColumnName.ToString();

        }

        //设置列标题格式

        rptSheet.get_Range(rptSheet.Cells[2, 1],rptSheet.Cells[2, col_count]).Font.Bold = true; // 是否加粗：是

 

        //设置单元格的格式 

        foreach (DataRow dr in outTable.Rows)

        {

            row_count++;

            col_count = 0;

            foreach (DataColumn col in outTable.Columns)

            {

                col_count++;

                if (col.DataType == System.Type.GetType("System.String"))

                {

                    rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[row_count + 2, col_count]).NumberFormatLocal = "@";

                }

                else if (col.DataType == System.Type.GetType("System.DateTime"))

                {

                    rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[row_count + 2, col_count]).NumberFormatLocal = "yyyy-m-d";

                }

            }

        }

 

        //向报表插入记录 

        for (int i = 0; i < outTable.Rows.Count; i++)

        {

            for (int j = 0; j < outTable.Columns.Count; j++)

            {

                k = i + 3;

                l = j + 1;

                rptSheet.Cells[k, l] = outTable.Rows[i][j].ToString();

                rptSheet.get_Range(rptSheet.Cells[1, l], rptSheet.Cells[1, l]).Borders.LineStyle = 7;

                rptSheet.get_Range(rptSheet.Cells[2, l], rptSheet.Cells[2, l]).Borders.LineStyle = 1;

                rptSheet.get_Range(rptSheet.Cells[k, l], rptSheet.Cells[k, l]).Borders.LineStyle = 1;

            }

        }

 

        //设置标题的格式 

        rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[1, 1]).Font.Bold = true;

        rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[1, 1]).Font.Size = 22;

 

        //设置报表的标题为跨列居中合并单元格 

        rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[1, col_count]).Select();

        rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[1, col_count]).HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenterAcrossSelection;

 

        //设置报表表格为最适应宽度 

        rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[row_count, col_count]).Select();

        rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[row_count, col_count]).Columns.AutoFit();

 

        //另存文件到指定路径下 

        rptBook.SaveAs(outFilePath, missing, missing, missing, missing, missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, missing, missing, missing, missing, missing);

        //关闭文件 

        rptBook.Close(false, outFilePath, true);

        rptApp.Quit();

        System.Runtime.InteropServices.Marshal.ReleaseComObject(rptSheet);

        System.Runtime.InteropServices.Marshal.ReleaseComObject(rptBook);

        System.Runtime.InteropServices.Marshal.ReleaseComObject(rptApp);

        //强制释放无用资源 

        GC.Collect();

    }

}

错误:检索 COM 类工厂中 CLSID 为 {00024500-0000-0000-C000-000000000046} 的组件时失败，原因是出现以下错误: 80070005。

解决方法一:
控制面板－》管理工具－》组件服务－》计算机－》我的电脑－》DCom配置－》找到Microsoft Excel 应用程序
之后
单击属性打开此应用程序的属性对话框。  
2. 单击标识选项卡，然后选择交互式用户。 
3.单击"安全"选项卡,分别在"启动和激活权限"和"访问权限"组中选中"自定义",然后
自定义->编辑->添加ASP.NET账户和IUSER_计算机名: 需要本地激活,和本地访问两个权限

4."标识"选项卡 选择交互式用户

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