asp.net DataSet数据写入Excel保存自定义名称到默认文件夹内

using System;using System.Web;using Excel;using System.Drawing;using System.IO;using System.Reflection;using System.Data;using System.Web.UI;using System.Web.UI.WebControls;/// <summary>        /// DataSet数据写入Excel保存自定义名称到默认文件夹内（C:\web\SaveFile）        /// </summary>        /// <param name="ds">System.Data.DataSet数据</param>        /// <param name="filename">文件名称（不含后缀）如"Wenjian"</param>        public static void WriteExcel(System.Data.DataSet ds, string filename)        {            System.Data.DataTable dt = ds.Tables[0];            //dt.Columns[0]               //Excel.Application excel = new Excel.Application();//引用Excel对象            //excel.Application.Workbooks.Add(true );//引用Excel工作簿            //excel.Cells[ 1 , 1 ] = "First Row First Column";            //excel.Cells[ 1 , 2 ] = "First Row Second Column";            //excel.Cells[ 2 , 1 ] = "Second Row First Column";            //excel.Cells[2, 2] = "Second Row Second Column";            //excel.Visible = true; //使Excel可视            //创建Application对象             Excel.Application xApp = new Excel.ApplicationClass();            xApp.Visible = false;            ////得到WorkBook对象, 可以用两种方式之一: 下面的是打开已有的文件             //Excel.Workbook xBook = xApp.Workbooks._Open(@"C:\web\SaveFile\az.xls",            //Missing.Value, Missing.Value, Missing.Value, Missing.Value            //, Missing.Value, Missing.Value, Missing.Value, Missing.Value            //, Missing.Value, Missing.Value, Missing.Value, Missing.Value);            Excel.Workbook xBook = xApp.Workbooks.Add(Missing.Value);//新建文件的代码             //指定要操作的Sheet，两种方式：             Excel.Worksheet xSheet = (Excel.Worksheet)xBook.Sheets[1];            //Excel.Worksheet xSheet=(Excel.Worksheet)xApp.ActiveSheet;             ////读取数据，通过Range对象             //Excel.Range rng1 = xSheet.get_Range("A1", Type.Missing);            //rng1.Value2 = "aaa";            ////读取，通过Range对象，但使用不同的接口得到Range             ////Excel.Range rng2 = (Excel.Range)xSheet.Cells[1,2];            ////rng2.Value2 = "bbb";            //((Excel.Range)xSheet.Cells[1, 2]).Value="ccc";            ////写入数据             //Excel.Range rng3 = xSheet.get_Range("B2", Missing.Value);            //rng3.Value2 = "Hello";            //rng3.Interior.ColorIndex = 6; //设置Range的背景色             for (int i = 0; i < dt.Columns.Count; i++)            {                ((Excel.Range)xSheet.Cells[1, i + 1]).Value = dt.Columns[i].ColumnName;                for (int j = 0; j < dt.Rows.Count; j++)                {                    ((Excel.Range)xSheet.Cells[j + 2, i + 1]).Value = dt.Rows[j][i];                }            }            string pFilePath = @"C:\web\SaveFile\" + filename ?? System.DateTime.Now.ToString("yyyyMMdd") + ".xlsx";            ////保存方式一：保存WorkBook             if (File.Exists(pFilePath))            {                File.Delete(pFilePath);            }            xBook.SaveAs(pFilePath,            Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value,            Excel.XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value,            Missing.Value, Missing.Value);            ////保存方式二：保存WorkSheet             //xSheet.SaveAs(@"../SaveFile/CData2.xls",            //Missing.Value, Missing.Value, Missing.Value, Missing.Value,            //Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);            //保存方式三             //xBook.Save();            xSheet = null;            xBook = null;            xApp.Quit(); //这一句是非常重要的，否则Excel对象不能从内存中退出             xApp = null;        }

封装到类库ExcelHelper

直接调用