c#读取excel

csharp

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2019-1-7

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c#读取excel

    protected void btnImport_Click(object sender, EventArgs e)  
        {  
            if (FileUpload1.HasFile == false)//HasFile用来检查FileUpload是否有指定文件  
            {  
                Response.Write("<script>alert('请您选择Excel文件')</script> ");  
                return;//当无文件时,返回  
            }  
            string IsXls = System.IO.Path.GetExtension(FileUpload1.FileName).ToString().ToLower();//System.IO.Path.GetExtension获得文件的扩展名  
            if (IsXls != ".xls" || IsXls == ".xlsx")  
            {  
                Response.Write("<script>alert('只可以选择Excel文件')</script>");  
                return;//当选择的不是Excel文件时,返回  
            }  
         if (!Directory.Exists(Server.MapPath("~/ExcelTemp/")))  
             {  
                 Directory.CreateDirectory(Server.MapPath("~/ExcelTemp/"));  
             }  
            string filename = FileUpload1.FileName;              //获取Execle文件名  DateTime日期函数  
            string savePath = Server.MapPath("~/ExcelTemp/"+ filename);//Server.MapPath 获得虚拟服务器相对路径  
            FileUpload1.SaveAs(savePath);                        //SaveAs 将上传的文件内容保存在服务器上  
            DataSet ds = ExcelSqlConnection(savePath, filename);           //调用自定义方法  
            DataRow[] dr = ds.Tables[0].Select();            //定义一个DataRow数组  
            int rowsnum = ds.Tables[0].Rows.Count;  
            if (rowsnum == 0)  
            {  
                Response.Write("<script>alert('Excel表为空表,无数据!')</script>");   //当Excel表为空时,对用户进行提示  
            }  
            else  
            {  
                for (int i = 0; i < dr.Length; i++)  
                {  
                      
                    string title = dr[i]["标题"].ToString();  
                    string linkurl = dr[i]["链接地址"].ToString();  
                    string categoryname = dr[i]["分类"].ToString();  
                    string customername = dr[i]["内容商"].ToString();  
                      
                    //Response.Write("<script>alert('导入内容:" + ex.Message + "')</script>");  
                }  
                Response.Write("<script>alert('Excle表导入成功!');</script>");  
            }  
      
      
        }  
     
     
        #region 连接Excel  读取Excel数据   并返回DataSet数据集合  
        /// <summary>  
        /// 连接Excel  读取Excel数据   并返回DataSet数据集合  
        /// </summary>  
        /// <param name="filepath">Excel服务器路径</param>  
        /// <param name="tableName">Excel表名称</param>  
        /// <returns></returns>  
        public static System.Data.DataSet ExcelSqlConnection(string filepath, string tableName)  
        {  
            string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath + ";Extended Properties='Excel 8.0;HDR=YES;IMEX=1'";  
            OleDbConnection ExcelConn = new OleDbConnection(strCon);  
            try  
            {  
                string strCom = string.Format("SELECT * FROM [Sheet1$]");  
                ExcelConn.Open();  
                OleDbDataAdapter myCommand = new OleDbDataAdapter(strCom, ExcelConn);  
                DataSet ds = new DataSet();  
                myCommand.Fill(ds, "[" + tableName + "$]");  
                ExcelConn.Close();  
                return ds;  
            }  
            catch  
            {  
                ExcelConn.Close();  
                return null;  
            }  
        }  
        #endregion