C# 生成Excel 并保存 包含web和winform调用方法

using System;   

using System.Collections.Generic;   
using System.Text;   
using System.Data;   
using System.IO;   
using System.Web;   
using Microsoft.Office.Interop.Excel;   

namespace XT.LiTree.Logic   
{   
    public class ExcelExport   
    {   
        /// <summary>   
        /// 直接导出Excel   
        /// </summary>   
        /// <param name="ds">数据源DataSet</param>   
        /// <param name="fileName">保存文件名(例如：E:\a.xls)</param>   
        /// <returns></returns>   
        public bool DoExport(DataSet ds, string fileName)   
        {   
            if (ds.Tables.Count == 0 || fileName == string.Empty)   
            {   
                return false;   
            }   
            application excel = new ApplicationClass();   
            int rowindex = 1;   
            int colindex = 0;   
            Workbook work = excel.Workbooks.Add(true);   
            //Worksheet sheet1 = (Worksheet)work.Worksheets[0];   
            System.Data.DataTable table = ds.Tables[0];   
            foreach (DataColumn col in table.Columns)   
            {   
                colindex++;   
                excel.Cells[1, colindex] = col.ColumnName;   
            }   
            foreach (DataRow row in table.Rows)   
            {   
                rowindex++;   
                colindex = 0;   
                foreach (DataColumn col in table.Columns)   
                {   
                    colindex++;   
                    excel.Cells[rowindex, colindex] = row[col.ColumnName].ToString();   
                }   
            }   
            excel.Visible = false;   
            //((Worksheet)work.Sheets[0]).Name = "sss";   
            excel.ActiveWorkbook.SaveAs(fileName, XlFileFormat.xlExcel9795, null, null, false, false, XlSaveAsaccessMode.xlNoChange, null, null, null, null, null);   
            excel.Quit();   
            excel = null;   
            GC.Collect();   
            return true;   
        }   
        /// <summary>   
        /// 直接导出Excel   
        /// </summary>   
        /// <param name="ds">数据源DataSet</param>   
        /// <param name="columns">列名数组,允许为空(columns=null),为空则表使用默认数据库列名 </param>   
        /// <param name="fileName">保存文件名(例如：E:\a.xls)</param>   
        /// <returns></returns>   
        public bool DoExport(DataSet ds, string[] columns, string fileName)   
        {   
            if (ds.Tables.Count == 0 || fileName == string.Empty)   
            {   
                return false;   
            }   
            Application excel = new ApplicationClass();   
            int rowindex = 1;   
            int colindex = 0;   
            Workbook work = excel.Workbooks.Add(true);   
            //Worksheet sheet1 = (Worksheet)work.Worksheets[0];   
            System.Data.DataTable table = ds.Tables[0];   
            if (columns != null)   
            {   
                for (int i = 0; i < columns.Length; i++)   
                {   
                    colindex++;   
                    if (columns[i] != null && columns[i] != "")   
                    {   
                        excel.Cells[1, colindex] = columns[i];   
                    }   
                    else  
                    {   
                        excel.Cells[1, colindex] = table.Columns[i].ColumnName;   
                    }   
                }   
            }   
            else  
            {   
                foreach (DataColumn col in table.Columns)   
                {   
                    colindex++;   
                    excel.Cells[1, colindex] = col.ColumnName;   
                }   
            }   
            foreach (DataRow row in table.Rows)   
            {   
                rowindex++;   
                colindex = 0;   
                foreach (DataColumn col in table.Columns)   
                {   
                    colindex++;   
                    excel.Cells[rowindex, colindex] = row[col.ColumnName].ToString();   
                }   
            }   
            excel.Visible = false;   
            //((Worksheet)work.Sheets[0]).Name = "sss";   
            excel.ActiveWorkbook.SaveAs(fileName, XlFileFormat.xlExcel9795, null, null, false, false, XlSaveAsAccessMode.xlNoChange, null, null, null, null, null);   
            excel.Quit();   
            excel = null;   
            GC.Collect();   
            return true;   
        }   
                           
        /// <summary>   
        /// 直接导出Excel   
        /// </summary>   
        /// <param name="sql">SQL查询语句</param>   
        /// <param name="columns">列名数组</param>   
        /// <param name="fileName">保存文件名(例如：E:\a.xls)</param>   
        /// <returns></returns>   
        public bool DoExport(string sql, string[] columns, string fileName)   
        {   
            Dao.DataBase db = new XT.LiTree.Dao.DataBase();   
            DataSet ds = db.GetDS(sql);   
            if (ds.Tables.Count == 0 || fileName == string.Empty)   
            {   
                return false;   
            }   
            Application excel = new ApplicationClass();   
            int rowindex = 1;   
            int colindex = 0;   
            Workbook work = excel.Workbooks.Add(true);   
            //Worksheet sheet1 = (Worksheet)work.Worksheets[0];   
            System.Data.DataTable table = ds.Tables[0];   
            if (columns != null)   
            {   
                for (int i = 0; i < columns.Length; i++)   
                {   
                    colindex++;   
                    if (columns[i] != null && columns[i] != "")   
                    {   
                        excel.Cells[1, colindex] = columns[i];   
                    }   
                    else  
                    {   
                        excel.Cells[1, colindex] = table.Columns[i].ColumnName;   
                    }   
                }   
            }   
            else  
            {   
                foreach (DataColumn col in table.Columns)   
                {   
                    colindex++;   
                    excel.Cells[1, colindex] = col.ColumnName;   
                }   
            }   
            foreach (DataRow row in table.Rows)   
            {   
                rowindex++;   
                colindex = 0;   
                foreach (DataColumn col in table.Columns)   
                {   
                    colindex++;   
                    excel.Cells[rowindex, colindex] = row[col.ColumnName].ToString();   
                }   
            }   
            excel.Visible = false;   
            //((Worksheet)work.Sheets[0]).Name = "sss";   
            excel.ActiveWorkbook.SaveAs(fileName, XlFileFormat.xlExcel9795, null, null, false, false, XlSaveAsAccessMode.xlNoChange, null, null, null, null, null);   
            excel.Quit();   
            excel = null;   
            GC.Collect();   
            return true;   
        }   
        /// <summary>   
        /// 通过流导出Excel   
        /// </summary>   
        /// <param name="ds">数据源DataSet</param>   
        /// <param name="fileName">保存文件名(例如：a.xls)</param>   
        /// <returns></returns>   
        public bool StreamExport(DataSet ds, string fileName)   
        {   
            if (ds.Tables.Count == 0 || fileName == string.Empty)   
            {   
                return false;   
            }   
            System.Data.DataTable dt = ds.Tables[0];   
            StringBuilder content = new StringBuilder();   
            StringBuilder strtitle = new StringBuilder();   
            content.Append("<html xmlns:o='urn:schemas-microsoft-com:office:office' xmlns:x='urn:schemas-microsoft-com:office:excel' xmlns='http://www.w3.org/TR/REC-html40'>");   
            content.Append("<head><title></title><meta http-equiv='Content-Type' content=\"text/html; charset=gb2312\"></head><body><table x:str cellspacing='0' rules='all' border='1' id='title1' style="border-collapse:collapse;" mce_style="border-collapse:collapse;">");   
            content.Append("<tr>");   
            for (int j = 0; j < dt.Columns.Count; j++)   
            {   
                content.Append("<td>" + dt.Columns[j].ColumnName + "</td>");   
            }   
            content.Append("</tr>\n");   
            for (int j = 0; j < dt.Rows.Count; j++)   
            {   
                content.Append("<tr>");   
                for (int k = 0; k < dt.Columns.Count; k++)   
                {   
                    content.Append("<td>" + dt.Rows[j][k].ToString() + "</td>");   
                }   
                content.Append("</tr>\n");   
            }   
            content.Append("</table></body></html>");   
            content.Replace(" ", "");   
            //fileContent = (byte[])System.Text.Encoding.Default.GetBytes(content.ToString());       
            //System.Web.UI.WebControls.   
            System.Web.HttpContext.Current.Response.Clear();   
            System.Web.HttpContext.Current.Response.Buffer = true;   
            System.Web.HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";   
            System.Web.HttpContext.Current.Response.Charset = "GB2312";   
            HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");   
            System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment; filename=" + fileName);//HttpUtility.UrlEncode(fileName));   
            //            HttpUtility.UrlEncode(fileName,Encoding.UTF8);   
            //System.Web.HttpContext.Current.Response.ContentEncoding=System.Text.Encoding.Default;   
            System.Web.HttpContext.Current.Response.Write(content.ToString());   
            System.Web.HttpContext.Current.Response.End();   
            return true;   
        }   
        /// <summary>   
        /// 通过流导出Excel   
        /// </summary>   
        /// <param name="ds">数据源DataSet</param>   
        /// <param name="columns">列名数组,允许为空(columns=null),为空则表使用默认数据库列名</param>   
        /// <param name="fileName"></param>   
        /// <returns></returns>   
        public bool StreamExport(DataSet ds, string[] columns, string fileName)   
        {   
            if (ds.Tables.Count == 0 || fileName == string.Empty)   
            {   
                return false;   
            }   
            System.Data.DataTable dt = ds.Tables[0];   
            StringBuilder content = new StringBuilder();   
            StringBuilder strtitle = new StringBuilder();   
            content.Append("<html xmlns:o='urn:schemas-microsoft-com:office:office' xmlns:x='urn:schemas-microsoft-com:office:excel' xmlns='http://www.w3.org/TR/REC-html40'>");   
            content.Append("<head><title></title><meta http-equiv='Content-Type' content=\"text/html; charset=gb2312\"></head><body><table x:str cellspacing='0' rules='all' border='1' id='title1' style="border-collapse:collapse;" mce_style="border-collapse:collapse;">");   
            content.Append("<tr>");   
            if (columns != null)   
            {   
                for (int i = 0; i < columns.Length; i++)   
                {   
                    if (columns[i] != null && columns[i] != "")   
                    {   
                        content.Append("<td>" + columns[i] + "</td>");   
                    }   
                    else  
                    {   
                        content.Append("<td>" + dt.Columns[i].ColumnName + "</td>");   
                    }   
                }   
            }   
            else  
            {   
                for (int j = 0; j < dt.Columns.Count; j++)   
                {   
                    content.Append("<td>" + dt.Columns[j].ColumnName + "</td>");   
                }   
            }   
            content.Append("</tr>\n");   
            for (int j = 0; j < dt.Rows.Count; j++)   
            {   
                content.Append("<tr>");   
                for (int k = 0; k < dt.Columns.Count; k++)   
                {   
                    content.Append("<td>" + dt.Rows[j][k].ToString() + "</td>");   
                }   
                content.Append("</tr>\n");   
            }   
            content.Append("</table></body></html>");   
            content.Replace(" ", "");   
            //fileContent = (byte[])System.Text.Encoding.Default.GetBytes(content.ToString());       
            //System.Web.UI.WebControls.   
            System.Web.HttpContext.Current.Response.Clear();   
            System.Web.HttpContext.Current.Response.Buffer = true;   
            System.Web.HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";   
            System.Web.HttpContext.Current.Response.Charset = "GB2312";   
            HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");   
            System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment; filename=" + fileName);//HttpUtility.UrlEncode(fileName));   
            //            HttpUtility.UrlEncode(fileName,Encoding.UTF8);   
            //System.Web.HttpContext.Current.Response.ContentEncoding=System.Text.Encoding.Default;   
            System.Web.HttpContext.Current.Response.Write(content.ToString());   
            System.Web.HttpContext.Current.Response.End();   
            return true;   
        }   
        /// <summary>   
        /// 通过流导出Excel   
        /// </summary>   
        /// <param name="ds">数据源DataSet</param>   
        /// <param name="columns">列名数组,允许为空(columns=null),为空则表使用默认数据库列名</param>   
        /// <param name="fileName"></param>   
        /// <returns></returns>   
        public bool StreamExport(string sql, string[] columns, string fileName)   
        {   
            Dao.DataBase db = new XT.LiTree.Dao.DataBase();   
            DataSet ds = db.GetDS(sql);   
            if (ds.Tables.Count == 0 || fileName == string.Empty)   
            {   
                return false;   
            }   
            System.Data.DataTable dt = ds.Tables[0];   
            StringBuilder content = new StringBuilder();   
            StringBuilder strtitle = new StringBuilder();   
            content.Append("<html xmlns:o='urn:schemas-microsoft-com:office:office' xmlns:x='urn:schemas-microsoft-com:office:excel' xmlns='http://www.w3.org/TR/REC-html40'>");   
            content.Append("<head><title></title><meta http-equiv='Content-Type' content=\"text/html; charset=gb2312\"></head><body><table x:str cellspacing='0' rules='all' border='1' id='title1' style="border-collapse:collapse;" mce_style="border-collapse:collapse;">");   
            content.Append("<tr>");   
            if (columns != null)   
            {   
                for (int i = 0; i < columns.Length; i++)   
                {   
                    if (columns[i] != null && columns[i] != "")   
                    {   
                        content.Append("<td>" + columns[i] + "</td>");   
                    }   
                    else  
                    {   
                        content.Append("<td>" + dt.Columns[i].ColumnName + "</td>");   
                    }   
                }   
            }   
            else  
            {   
                for (int j = 0; j < dt.Columns.Count; j++)   
                {   
                    content.Append("<td>" + dt.Columns[j].ColumnName + "</td>");   
                }   
            }   
            content.Append("</tr>\n");   
            for (int j = 0; j < dt.Rows.Count; j++)   
            {   
                content.Append("<tr>");   
                for (int k = 0; k < dt.Columns.Count; k++)   
                {   
                    content.Append("<td>" + dt.Rows[j][k].ToString() + "</td>");   
                }   
                content.Append("</tr>\n");   
            }   
            content.Append("</table></body></html>");   
            content.Replace(" ", "");   
            //fileContent = (byte[])System.Text.Encoding.Default.GetBytes(content.ToString());       
            //System.Web.UI.WebControls.   
            System.Web.HttpContext.Current.Response.Clear();   
            System.Web.HttpContext.Current.Response.Buffer = true;   
            System.Web.HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";   
            System.Web.HttpContext.Current.Response.Charset = "GB2312";   
            HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");   
            System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment; filename=" + fileName);//HttpUtility.UrlEncode(fileName));   
            //            HttpUtility.UrlEncode(fileName,Encoding.UTF8);   
            //System.Web.HttpContext.Current.Response.ContentEncoding=System.Text.Encoding.Default;   
            System.Web.HttpContext.Current.Response.Write(content.ToString());   
            System.Web.HttpContext.Current.Response.End();   
            return true;   
        }   
    }   
}