把Excel数据导入到数据库

引入命名空间

 using System.IO;
 using System.Data;
 using System.Data.OleDb;

引入命名空间

首先要把Excel上传到服务器

  //上传Excel文件到服务器
         protected void btnUpLoad_Click(object sender, EventArgs e)
         {
             ddlSelect.Items.Clear();
             if (this.fuExcel.HasFile)
             {
                 string filename = fuExcel.PostedFile.FileName;
                 FileInfo info = new FileInfo(filename);
                 string name = info.Name;
                 string type = info.Extension;
                 if (type == ".xls" || type == ".xlsx")
                 {
                     string savepath = Server.MapPath("~/Excel");
                     this.fuExcel.SaveAs(savepath+"\\"+name);
                     filename=savepath+"\\"+name;
                     getSheetName(filename);
                     ViewState["FileName"] = filename;
                 }
                 else
                 {
                     Page.ClientScript.RegisterStartupScript(this.GetType(), "key", "<script>alert('文件格式不正确,请重新选择！')</script>");
                 }
             }
             else
             {
                 Page.ClientScript.RegisterStartupScript(this.GetType(), "key", "<script>alert('请选择要导入数据的Excel文件!')</script>");
             }
         }

上传Excel到服务器

 //获取EXCEL工作簿名称
        private DataSet getSheetName(string filepath)
        {
            DataSet ds = new DataSet();
            string strCon;
            strCon = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source= '" + filepath + "'; Extended Properties='Excel 12.0; HDR=YES;IMEX=1';";
            OleDbConnection ODConn = new OleDbConnection(strCon);
            ODConn.Open();
            DataTable dtOle = ODConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
            if (dtOle == null) return null;
            String[] excelSheets = new String[dtOle.Rows.Count];
            int i = ;
            foreach (DataRow row in dtOle.Rows)
            {
                excelSheets[i] = row["TABLE_NAME"].ToString();
                ddlSelect.Items.Add(new ListItem(excelSheets[i].Substring(,excelSheets[i].Length-),excelSheets[i].Substring(,excelSheets[i].Length-)));
                i++;
            }
            ODConn.Close();
            return ds;
        }

获取EXCEL工作簿名称

根据选择的工作簿去导入数据

 //把数据导入到数据库中
         protected void btnImport_Click(object sender, EventArgs e)
         {
             if (!string.IsNullOrEmpty(ddlSelect.SelectedValue))
             {
                 DataTable dt = GetDate(ViewState["FileName"].ToString()).Tables[];//获取Excel工作薄中的数据
                 if (dt.Rows.Count > )
                 {
                     int s=;
                     int ss = ;
                     for (int i = ; i < dt.Rows.Count; i++)
                     {
                         DataSet j = sqlhelp.ReturnDataTable("select name from students where name=@0", dt.Rows[i][].ToString());//去重
                         if (j.Tables[].Rows.Count>)
                         {
                             s++;
                         }
                         else
                         {
                             int x = sqlhelp.ExecuteNonQuery("insert into students(Name,Sex,Birthday,PhoneNum,Post) values(@0,@1,@2,@3,@4)", dt.Rows[i][].ToString(), dt.Rows[i][].ToString(), dt.Rows[i][].ToString(), dt.Rows[i][].ToString(), dt.Rows[i][].ToString());//把数据导入到数据库
                             ss += x;
                         }
                     }
                     Page.ClientScript.RegisterStartupScript(this.GetType(), "key", "<script>alert('导入成功有" + ss + "条,数据重复" + s + "条,共有数据" + dt.Rows.Count + "条')</script>");
                     return;
                 }
                 else
                 {
                     Page.ClientScript.RegisterStartupScript(this.GetType(), "key", "<script>alert('选中的工作簿内没有数据')</script>");
                 }
             }
             else
             {
                 Page.ClientScript.RegisterStartupScript(this.GetType(), "key", "<script>alert('请选择EXCEL的工作簿再进行导入工作')</script>");
             }
         }

把数据导入到数据库

 private DataSet GetDate(string filepath)
         {
             DataSet ds = new DataSet();
             string strCon, strCmm;
             strCon = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source= '" + filepath + "'; Extended Properties='Excel 12.0; HDR=YES;IMEX=1';";
             strCmm = "select   distinct   *   from   [" +ddlSelect.SelectedValue + "$] ";
             OleDbConnection oleConn = new OleDbConnection(strCon);
             OleDbCommand oleCmm = new OleDbCommand(strCmm, oleConn);
             OleDbDataAdapter oleDa = new OleDbDataAdapter(oleCmm);
             oleDa.Fill(ds);
             oleConn.Close();
             return ds;
         }

获取选中工作薄的数据