Excel、记事本数据导入到数据库

将手机号批量导入数据库。思路：先将要导入的文件传上项目里，然后读取文件的每行数据并插入数据库，操作完后再将上传的文件删除

文件示例：

Excel：

记事本：

 

前台代码：

          <div class="tab-content detail" id="divSecond" runat="server" >
            <fieldset >
             <p>
                <label>
                  选择文件</label>
                  <asp:FileUpload ID="FileUpload1" runat="server"  /><asp:RequiredFieldValidator
                      ID="RequiredFieldValidator1" runat="server" ErrorMessage="请选择要提交的Excel文件" ControlToValidate="FileUpload1"></asp:RequiredFieldValidator>
              </p>
              <p>
              <label>文件示例</label><img src="../images/ex_excel.jpg" />
              </p>
            </fieldset>
            <div class="clear"></div>
           <div class="clear"></div>
            <div style="margin-left:200px">
                <asp:Button ID="btnExcel" runat="server" Text="提 交" CssClass="button"
                    onclick="btnExcel_Click"  />
                  &nbsp;&nbsp;&nbsp;
                <input class="button" type="button" value="返 回" onclick="javascript:window.location.href='CartList.aspx'" />
            </div>

          </div>

          <div class="tab-content detail" id="divThird" runat="server" >

            <fieldset >
              <p>
                <label>
                  选择文件</label>
                  <asp:FileUpload ID="FileUpload2" runat="server" /> <asp:RequiredFieldValidator
                      ID="RequiredFieldValidator2" runat="server" ErrorMessage="请选择要提交的tTXT文件"
                      ControlToValidate="FileUpload2"></asp:RequiredFieldValidator>
              </p>
              <p>
              <label>文件示例</label><img src="../images/ex_txt.jpg" />
              </p>
            </fieldset>

            <div class="clear"></div>

           <div class="clear"></div>

            <div style="margin-left:200px">
                <asp:Button ID="btnNotepad" runat="server" Text="提 交" CssClass="button"
                    onclick="btnNotepad_Click"  />
                  &nbsp;&nbsp;&nbsp;
                <input class="button" type="button" value="返 回" onclick="javascript:window.location.href='CartList.aspx'" />
            </div>
          </div>

后台代码

   //Excel上传
        protected void btnExcel_Click(object sender, EventArgs e)
        {
              string backStr= UploadFile(FileUpload1, "Excel",);
              if (backStr == "-1")
              {
                   //这里是放返回消息的，改为对应放消息的方式就行了，Js这个类就不上传了
                  //如  Response.Write("<script>alert('请选择要提交的Excel文件')</script>");
                  Js.ShowSureMsgBox(this.Page,"请选择要提交的Excel文件");
                  return;
              }
              else if (backStr == "-2")
              {
                  Js.ShowSureMsgBox(this.Page, "请选择.xls或.xlsx类型文件");
                  return;
              }
              else
              {
                  string url = backStr;   //绝对路径
                  DataTable dt = ExcelToDataSet(url);

                  if (dt.Rows.Count > )
                  {

                     for (int i = ; i < dt.Rows.Count; i++)
                     {
                          //读取每行数据          
                           string phoneNum= dt.Rows[i][].ToString();             
                     }  
                  }
                  else
                  {

                      Js.ShowSureMsgBox(this.Page, "文件内容为空");
                  }
                  File.Delete(url);  //删除上传的文件

              }
        }

        //记事本上传
        protected void btnNotepad_Click(object sender, EventArgs e)
        {
            string backStr = UploadFile(FileUpload2, "TXT",);
            if (backStr == "-1")
            {
                Js.ShowSureMsgBox(this.Page, "请选择要提交的TXT文件");
                return;
            }
            else if (backStr == "-2")
            {
                Js.ShowSureMsgBox(this.Page, "请选择.txt类型文件");
                return;
            }
            else
            {
                string url = backStr;   //绝对路径
                DataTable dt = ReadTXT(url);
                if (dt.Rows.Count > )
                {
                     for (int i = ; i < dt.Rows.Count; i++)
                     {
                          //读取每行数据          
                           string phoneNum= dt.Rows[i][].ToString();             
                     }                 
                }
                else
                {
                    Js.ShowSureMsgBox(this.Page, "文件内容为空");
                }
                File.Delete(url);  //删除上传的文件

            }
        }

        //上传文件
        public string UploadFile(FileUpload FileUploadName, string varfilename,int type)
        {

                if (FileUploadName.HasFile)//判断是否有上传文件
                {
                    string fileExtension = System.IO.Path.GetExtension(FileUploadName.FileName).ToLower();//获取文件的后缀名
                    if (type == )
                    {
                        if (fileExtension != ".xls" && fileExtension != ".xlsx")
                        {
                            return "-2";
                        }
                    }
                    if (type == )
                    {
                        if (fileExtension != ".txt")
                        {
                            return "-2";
                        }
                    }
                    string fpath = System.Web.HttpContext.Current.Server.MapPath("/Manager/Uploadfiles/" + varfilename + "/");//图片存储文件夹路径，需要按照不同的需要进行相应的修改

                    if (!Directory.Exists(fpath))//查看存储路径的文件是否存在
                    {
                        Directory.CreateDirectory(fpath);   //创建文件夹，并上传文件
                    }
                    string time = DateTime.Now.ToString("yyyyMMddhhmmssfff");//使用时间定义上传图片的名字
                    string picturename = time + fileExtension;

                    string newFilePath = fpath + picturename; //文件保存路径

                    FileUploadName.SaveAs(newFilePath);

                    return newFilePath;   //绝对路径

                }
                else
                {
                    return "-1";   //没有文件
                }            

        }

        //读取Excel数据
         public DataTable ExcelToDataSet(string filename)
        {

            //string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source = " + filename + ";Extended Properties=Excel 8.0";
           //解决Excel混合类型问题。参考 http://blog.csdn.net/ranshouxu/article/details/6115039               
            string strCon = "Provider=Microsoft.Jet.Oledb.4.0;Data Source=" + filename + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'";   
            OleDbConnection conn = new OleDbConnection(strCon);

            conn.Open();

            //返回Excel的架构，包括各个sheet表的名称,类型，创建时间和修改时间等　

            DataTable dtSheetName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" });

            //包含excel中表名的字符串数组

            string[] strTableNames = new string[dtSheetName.Rows.Count];

            for (int k = ; k < dtSheetName.Rows.Count; k++)
            {

                strTableNames[k] = dtSheetName.Rows[k]["TABLE_NAME"].ToString();

            }

            OleDbDataAdapter myCommand = null;

            DataTable dt = new DataTable();

            //从指定的表明查询数据,可先把所有表明列出来供用户选择

            string strExcel = "select * from [" + strTableNames[] + "]";

            myCommand = new OleDbDataAdapter(strExcel, strCon);

            myCommand.Fill(dt);
            conn.Close();

            return dt;

        }

        //读取记事本数据
         public DataTable ReadTXT(string dirTXT)
         {
             //StreamReader objReader = new StreamReader(dirTXT);
             //                                        路径，编码 
             StreamReader objReader = new StreamReader(dirTXT, System.Text.Encoding.GetEncoding("GB2312")); //解决中文问题。
             System.Data.DataTable dt = new System.Data.DataTable();
             dt.Columns.Add("DN", System.Type.GetType("System.String"));

             string sLine = "";

             while (sLine != null)
             {
                 sLine = objReader.ReadLine();
                 if (sLine != null && !sLine.Equals(""))
                 {
                     DataRow dr = dt.NewRow();
                     dr[] = sLine;
                     dt.Rows.Add(dr);
                 }
             }

             objReader.Close();
             return dt;
         }

感谢楼主的提醒，关于Excel是混合类型时造成数据丢失（有些数据行读取为空）的问题和记事本读取中文乱码问题，经过网上搜索已解决了，如果发现还有哪些不足的欢迎提点，有解决方法的贴出来分享~~~谢谢大家啦