.net 自己写的操作Excel 导入导出 类（以供大家参考和自己查阅）

由于现在网页很多都关系到Excel 的操作问题，其中数据的导入导出更是频繁，作为一个菜鸟，收集网上零散的知识，自己整合，写了一个Excel导入到GridView ,以及将GridView的数据导出到EXCEL的类方法，以供参考和方便自己以后查阅。

  1 #region 引用部分
  2 using System;
  3 using System.Collections.Generic;
  4 using System.Linq;
  5 using System.Web;
  6 using System.Data;
  7 using System.Data.OleDb;
  8 using System.IO;
  9 #endregion
 10 /// <summary>
 11 ///Excel_DataAcess 的摘要说明
 12 /// </summary>
 13 public class Excel_DataAcess
 14 {
 15     private string errors;
 16
 17     /// <summary>
 18     /// 获取方法错误提示
 19     /// </summary>
 20     public string Get_errors {
 21         get {
 22             return errors;
 23         }
 24     }
 25
 26     /// <summary>
 27     /// 由于版本问题，OIEDB的连接参数会有不同，所以这个字段如果拓展写，方便存储当下文件的OLEDB 的连接；
 28     /// </summary>
 29     private OleDbConnection strconnect = null;
 30
 31     /// <summary>
 32     /// 构造函数
 33     /// </summary>
 34     public Excel_DataAcess()
 35     {
 36         //
 37         //TODO: 在此处添加构造函数逻辑
 38         //
 39     }
 40
 41     /// <summary>
 42     /// 获取OLEDB的连接
 43     /// </summary>
 44     /// <param name="_path">EXCEL文件路径</param>
 45     /// <param name="flag">用于判断版本，07以下或07以上有不同的连接参数</param>
 46     /// <returns></returns>
 47     private OleDbConnection Get_Connect(string _path, int flag)
 48     {
 49         string connect;
 50         if (flag <= 7)
 51         {
 52             connect = "Provider=Microsoft.JET.OLEDB.4.0;Data Source=" + _path + ";Extended Properties=‘Excel 8.0;HDR=NO;IMEX=1‘;";
 53         }
 54         else
 55         {
 56             connect = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + _path + ";Extended Properties=‘Excel 8.0;HDR=NO;IMEX=1‘;";
 57         }
 58         OleDbConnection _con = new OleDbConnection(connect);
 59         return _con;
 60
 61     }
 62
 63     /// <summary>
 64     /// 导入EXCEL数据到GRIDVIEW中
 65     /// </summary>
 66     /// <param name="_path">文件路径</param>
 67     /// <param name="dt">导入的数据表</param>
 68     /// <returns>返回成功与否</returns>
 69     public bool ReportExce(string _path, out DataTable dt)
 70     {
 71
 72         bool result = false;
 73         dt = null;
 74
 75         try
 76         {
 77             OleDbConnection _con = Get_Connect(_path, 8);
 78             try
 79             {
 80                 _con.Open();
 81             }
 82             catch {
 83                 _con = Get_Connect(_path, 7);
 84                 _con.Open();
 85             }
 86             Dictionary<int,string> test= Get_Sheet(_con);
 87
 88             string sql = string.Format("select * from [{0}]", test[0]);
 89
 90             OleDbDataAdapter _date = new OleDbDataAdapter(sql, _con);
 91             DataSet _set = new DataSet();
 92             _date.Fill(_set, "table");
 93             dt = _set.Tables[0];
 94             _con.Close();
 95             result = true;
 96             strconnect = _con;
 97         }
 98         catch(Exception ex) {
 99             string err = ex.Message;
100         }
101
102         return result;
103
104
105     }
106
107     /// <summary>
108     /// 获取当前EXCEL文件的所有SHEET
109     /// </summary>
110     /// <param name="_con">当前连接</param>
111     /// <returns>返回一个集合</returns>
112     public Dictionary<int, string> Get_Sheet(OleDbConnection _con)
113     {
114         Dictionary<int, string> Allsheet = new Dictionary<int, string>();
115
116         DataTable dt = _con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
117
118         for (int i = 0; i < dt.Rows.Count;i++ ) {
119             Allsheet.Add(i, dt.Rows[i][2].ToString());
120         }
121
122         return Allsheet;
123     }
124
125     /// <summary>
126     /// 导出GRIDVIEW数据到EXCEL文件中
127     /// </summary>
128     /// <param name="obj">传入的GRIDVIEW控件</param>
129     /// <returns>返回成功与否</returns>
130     public bool OutExcel(object obj) {
131         System.Web.UI.WebControls.GridView gid = (System.Web.UI.WebControls.GridView)obj;
132
133         bool result = false;
134
135         //string style = "";
136         //if (gid.Rows.Count > 0) {
137         //    [email protected]"<style> .text { mso-number-format:\@; } </script> ";
138         //}
139         try
140         {
141             string filename = DateTime.Now.ToString();
142
143             HttpContext.Current.Response.ClearContent();
144
145             HttpContext.Current.Response.Buffer = true;
146             //HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
147             HttpContext.Current.Response.Charset = "GB2312";
148             //HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
149             HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
150             //Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
151             //Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
152             HttpContext.Current.Response.AddHeader("Content-disposition", "attachment;filename=" + filename + ".xls");
153             //Response.AddHeader("content-disposition", "attachment; filename=" + fileName);
154             HttpContext.Current.Response.ContentType = "application/excel";
155             //StreamWriter sw = new StreamWriter();
156             StringWriter sw = new StringWriter();
157             System.Web.UI.HtmlTextWriter htw = new System.Web.UI.HtmlTextWriter(sw);
158             gid.RenderControl(htw);
159             HttpContext.Current.Response.Write("<meta http-equiv=\"content-type\" content=\"application/ms-excel; charset=gb2312\"/>"+sw.ToString());
160
161             result = true;
162         }
163         catch (Exception ex)
164         {
165             errors = ex.Message;
166         }
167         finally {
168             HttpContext.Current.Response.End();
169         }
170         return result;
171
172     }
173 }