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asp.net開啟多線程異步處理

span dsta load returns post conf clas div exception

 protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                try
                {
                    Thread categoryThread = new Thread(new ThreadStart(BindCategory));
                    Thread newsThread = new Thread(new ThreadStart(BindNews));


                    categoryThread.Start();
                    newsThread.Start();


                    categoryThread.Join();
                    newsThread.Join();
                }
                
catch (Exception ex) { Response.Write(ex); } } }
  void BindCategory()
        {


            SqlConnection conn = ReturnSqlconn();
            SqlCommand comm = new SqlCommand("select * from  [dbo].[Channel_List]", conn);
            conn.Open();
            SqlDataReader sdr 
= comm.ExecuteReader(); GridView1.DataSource = sdr; GridView1.DataBind(); } void BindNews() { SqlConnection conn = ReturnSqlconn(); SqlCommand comm = new SqlCommand("select * from [dbo].[Channel_Type]", conn); conn.Open(); SqlDataReader sdr
= comm.ExecuteReader(); GridView2.DataSource = sdr; GridView2.DataBind(); }
 public SqlConnection ReturnSqlconn()
        { 
           string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
           SqlConnection cn = new SqlConnection(connectionString);
           return cn;
        }

asp.net開啟多線程異步處理