c# excel sheep 导出

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Reflection;
using System.Collections;
using Microsoft.Office.Interop.Excel;
namespace Common
{
    public class ExcelExportHelper
    {
        /// <summary> 
        /// 集合装换DataTable
        /// </summary> 
        /// <param name="list">集合</param> 
        /// <returns></returns> 
        public static System.Data.DataTable ToDataSet(IList p_List)
        {
            System.Data.DataTable _DataTable = new System.Data.DataTable();
            if (p_List.Count > 0)
            {
                PropertyInfo[] propertys = p_List[0].GetType().GetProperties();
                foreach (PropertyInfo pi in propertys)
                {
                    _DataTable.Columns.Add(pi.Name, pi.PropertyType);
                }
                for (int i = 0; i < p_List.Count; i++)
                {
                    ArrayList tempList = new ArrayList();
                    foreach (PropertyInfo pi in propertys)
                    {
                        object obj = pi.GetValue(p_List[i], null);
                        tempList.Add(obj);
                    }
                    object[] array = tempList.ToArray();
                    _DataTable.LoadDataRow(array, true);
                }
            }
            return _DataTable;
        }
        /// <summary>
        /// 分Sheet导出Excel文件
        /// </summary>
        /// <param name="dv">需导出的DataView</param>
        /// <returns>导出文件的路径</returns>
        /// <summary>
        /// 分Sheet导出Excel文件
        /// </summary>
        /// <param name="ds">需要导出的数据集 可包含多个Table</param>
        /// <param name="fileName">导出的文件名(不能有横线-,也不能有空格)</param>
        /// <returns></returns>
        public static void DataView2ExcelBySheet(string[] SheetName, DataSet ds, string fileName)
        {
            GC.Collect();//垃圾回收
            Application excel;
            _Workbook xBk;
            _Worksheet xSt = null;
            excel = new ApplicationClass();
            xBk = excel.Workbooks.Add(true);
            //定义循环中要使用的变量
            int rowIndex = 0;
            int colIndex = 0;
            int sheetCount = 1;
            //对全部Sheet进行操作
            foreach (System.Data.DataTable dt in ds.Tables)
            {
                //初始化Sheet中的变量
                rowIndex = 1;
                colIndex = 1;
                //创建一个Sheet
                if (null == xSt)
                {
                    xSt = (_Worksheet)xBk.Worksheets.Add(Type.Missing, Type.Missing, 1, Type.Missing);
                }
                else
                {
                    xSt = (_Worksheet)xBk.Worksheets.Add(Type.Missing, xSt, 1, Type.Missing);
                }
                //设置Sheet的名称
                if (SheetName.Length > 0)
                {
                    xSt.Name = SheetName[sheetCount - 1];
                }
                //取得标题
                foreach (DataColumn col in dt.Columns)
                {
                    //设置标题格式
                    xSt.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter; //设置标题居中对齐
                    xSt.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).Font.Bold = true;//设置标题为粗体
                    //填值，并进行下一列
                    excel.Cells[rowIndex, colIndex++] = col.ColumnName;
                }
                //取得表格中数量
                int drvIndex;
                for (drvIndex = 0; drvIndex <= dt.Rows.Count - 1; drvIndex++)
                {
                    DataRow row = dt.Rows[drvIndex];
                    //新起一行，当前单元格移至行首
                    rowIndex++;
                    colIndex = 1;
                    foreach (DataColumn col in dt.Columns)
                    {
                        if (col.DataType == System.Type.GetType("System.DateTime"))
                        {
                            excel.Cells[rowIndex, colIndex] = (Convert.ToDateTime(row[col.ColumnName].ToString())).ToString("yyyy-MM-dd");
                        }
                        else if (col.DataType == System.Type.GetType("System.String"))
                        {
                            if (row[col.ColumnName].ToString().Contains("http"))
                            {
                                excel.Cells[rowIndex, colIndex] = row[col.ColumnName].ToString();
                                Range tempRange = xSt.get_Range(xSt.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]);
                                string strHyperlinks = row[col.ColumnName].ToString();
                                xSt.Hyperlinks.Add(tempRange, strHyperlinks, Missing.Value, Missing.Value, Missing.Value);
                            }
                            else
                            {
                                excel.Cells[rowIndex, colIndex] = "'" + row[col.ColumnName].ToString();
                            }
                        }
                        else
                        {
                            excel.Cells[rowIndex, colIndex] = row[col.ColumnName].ToString();
                        }
                        colIndex++;
                    }
                }
                //使用最佳宽度
                Range allDataWithTitleRange = xSt.get_Range(excel.Cells[1, 1], excel.Cells[rowIndex, colIndex - 1]);
                allDataWithTitleRange.Select();
                allDataWithTitleRange.Columns.AutoFit();
                allDataWithTitleRange.Borders.LineStyle = 1;//将导出Excel加上边框
                sheetCount++;
            }
            //设置导出文件在服务器上的文件夹
            string exportDir = "~/ExcelFile/";//注意:该文件夹您须事先在服务器上建好才行
            string strPath = System.IO.Path.Combine(exportDir, fileName);
            //设置文件在服务器上的路径
            string absFileName = HttpContext.Current.Server.MapPath(exportDir) + fileName;
            xBk.SaveCopyAs(absFileName);
            xBk.Close(false, null, null);
            excel.Quit();
            System.Runtime.InteropServices.Marshal.ReleaseComObject(xBk);
            System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
            System.Runtime.InteropServices.Marshal.ReleaseComObject(xSt);
            xBk = null;
            excel = null;
            xSt = null;
            GC.Collect();
            HttpResponse resp;
            resp = System.Web.HttpContext.Current.Response;
            resp.Charset = "GB2312";
            resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
            resp.AppendHeader("Content-Disposition", ("attachment;filename=" + fileName));
            resp.WriteFile(absFileName, false);
            resp.End();

        }
    }
}
------------------------------
/// <summary>
        /// 文件查询页导出功能
        /// </summary>
        public void SelectDoc_Export2(string data)
        {
            var input = data.DeserializeObject<StructSelectDoc>();
            using (var context = DOCDBHelper.DataContext)
            {
                var results = context.Usp_DOC_SelectDoc_Export(input.docNo, input.docName, input.docFlag,
                    input.docCatagoryID, input.docSenderName, input.docSenderDep, input.docRecvDepName,
                    input.createDate1, input.createDate2);
                List<Usp_DOC_SelectDoc_ExportResult1> revList = results.GetResult<Usp_DOC_SelectDoc_ExportResult1>().ToList();
                List<Usp_DOC_SelectDoc_ExportResult2> sendList = results.GetResult<Usp_DOC_SelectDoc_ExportResult2>().ToList();
                DataSet ds = new DataSet();
                if (revList != null && revList.Count > 0)
                {
                    ds.Tables.Add(CommonUtil.ListToDataTable(revList));
                }
                if (sendList != null && sendList.Count > 0)
                {
                    ds.Tables.Add(CommonUtil.ListToDataTable(sendList));
                }
                if (ds.Tables.Count > 0)
                {
                    string fileName = "DocExport.csv";
                    string[] sheetName = new string[] { "收文", "发文" };
                    ExcelExportHelper.DataView2ExcelBySheet(sheetName, ds, fileName);
                }
            }
        }