Excel文件数据保存到SQL中

        /// <summary>
        /// 查询Excel文件中的数据
        /// </summary>
        /// <param name="strPath">文件路径</param>
        /// <param name="sheetName">工作表名</param>
        /// <returns>DataTable</returns>
        public DataTable getExcel(string strPath,string sheetName)
        {
            string mystring = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source = ‘" + strPath + "‘;Extended Properties=‘Excel 8.0;HDR=Yes;IMEX=1;‘";
　　　　　　　　//连接串, HDR=yes  表示excel第一行是标题行，反之表示第一行不是标题行
            OleDbConnection cnnxls = new OleDbConnection(mystring);
            cnnxls.Open();
            OleDbDataAdapter myDa = new OleDbDataAdapter("select * from [" + sheetName + "]", cnnxls);//查询工作表中的数据
            DataSet ds = new DataSet();
            myDa.Fill(ds, "[" + sheetName + "]");
            cnnxls.Close();
            DataTable dt = ds.Tables[0];
            return dt;
        }

        /// <summary>
        /// 把Excel中的数据保存到sql数据库中
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnSave_Click(object sender, EventArgs e)
        {

            if (LaValue.Text.Length >0)
            {
                Helper.ExcelHelper eh = new Helper.ExcelHelper();//公共方法类对象，封装Excel操作的方法
                DataTable dt = eh.getExcel(LaValue.Text, DropDownList1.Text.ToString());//得到Datatable
                DataRow[] dr = dt.Select();//得到
                int rowsnum = dt.Rows.Count;//表中数据行数
                List<String> lstMsg = new List<string>();//保存失败信息
                if (rowsnum == 0)
                {
                    Page.ClientScript.RegisterStartupScript(this.GetType(), "a", "alert(‘Excel表为空表,无数据!‘);", true);
                }

                else
                {
                    String error = "";
                    for (int i = 0; i < dr.Length; i++)//循环插入数据
                    {
                        // excel列名不能变
                        string C_OraName = dr[i]["CompanyName"].ToString();
                        string C_Town = dr[i]["Town"].ToString();
                        string C_Trding = dr[i]["Trading"].ToString();
                        string C_PostCode = dr[i]["PostCode"].ToString();
                        string C_Phone = dr[i]["Phone"].ToString();

                        if (String.IsNullOrEmpty(C_OraName))
                        {
                            error += "公司名不能为空 ";
                        }
                        if (error.Equals(""))   //
                        {
                            Model.Model_Companey company_model = new Model.Model_Companey();
                            BLL.BLL_Companey company_bll = new BLL.BLL_Companey();
                            company_model.C_OraName = C_OraName;
                            company_model.C_Town = C_Town;
                            company_model.C_Trding = C_Trding;
                            company_model.C_Postcode = C_PostCode;
                            company_model.C_Phone = C_Phone;
                            // 公司名之前未出现过
                            if (Helper.SQLHelper.SqlContains(C_OraName, "Companey", "C_OraName") == false)
                            {
                                company_bll.Add(company_model);//添加数据
                            }
                            else
                            {
                                error = C_OraName + "已存在";
                                lstMsg.Add("未导入成功，" + "原因:" + error + "。");//保存错误信息
                                error = "";
                            }
                        }
                        else
                        {
                        }
                    }
                    this.txtMessageList.Items.Add("导入完成。");
                    if (null != lstMsg)
                    {
                        this.txtMessageList.Items.Add("共有" + lstMsg.Count() + "条记录未成功。<br /><br />");
                        foreach (string s in lstMsg)
                        {
                            this.txtMessageList.Items.Add(s);
                        }
                    }
                }
            } 
        }

        /// <summary>
        /// 把工作表名绑定到DropDownList控件中
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnup_Click(object sender, EventArgs e)
        {
            if (FileUpload1.HasFile)
            {
                string ext = System.IO.Path.GetExtension(FileUpload1.FileName);//获取文件后缀
                if (ext.ToLower() != ".xls" && ext.ToLower() != ".xlsx")
                {
                    Page.ClientScript.RegisterStartupScript(this.GetType(), "a", "alert(‘请选择一个Excel文件!‘);", true);
                    return;
                }
                HttpFileCollection files = HttpContext.Current.Request.Files;//获取页面上所有的FileUpload控件
                string tmp = files[0].FileName;
                string savePath = "e:/test/" + DateTime.Now.ToString("yymmdd") + ".xls";//保存路径
                LaValue.Text = savePath; //保存路径到一个不可见的Label控件中            
                FileUpload1.SaveAs(savePath);//保存文件
                DropdownListBind(savePath);//绑定DropDownList
            }
        } 

        /// <summary>
        /// 绑定DropDownList
        /// </summary>
        /// <param name="savePath">路径</param>
        protected void DropdownListBind(string savePath)
        {
            string mystring = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source = ‘" + savePath + "‘;Extended Properties=‘Excel 8.0;HDR=Yes;IMEX=1;‘";//连接Excel串
            OleDbConnection cnnxls = new OleDbConnection(mystring);//创建连接
            cnnxls.Open();
            DataSet ds = new DataSet();
            DataTable dt = cnnxls.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });//获取工作表名
            DropDownList1.DataSource = dt;
            foreach (DataRow dr in dt.Rows)
            {
                DropDownList1.Items.Add((String)dr["TABLE_NAME"]);//向控件中添加工作表名
            }
            cnnxls.Close();
        }