WPF使用线程刷新UI

Question

我想把一个TextBox中的文字按照datatable中的文字顺序（rows0-rowsmax）每秒进行刷新，刷新不了，高手看看要怎么改。        private void btnDrawing_Click(object sender, RoutedEventArgs e)
        {
            BeginDrawText();
        }
 private void BeginDrawText()
        {
            stopFlag = false;
            Thread thread = new Thread(new
            ThreadStart(refreshText));
            thread.Start();  
        }        private delegate void DelegateDrawText();
        private bool stopFlag = false; private void refreshText()
        {
            while (!stopFlag)
            {
                //向UI界面更新显示 
                Dispatcher.Invoke(System.Windows.Threading.
                DispatcherPriority.SystemIdle,
                new DelegateDrawText
                (DrawText));
            }
        }
 private void DrawText()
        {
            String currentTime = System.
            DateTime.Now.ToString();
            txtDrawUser.Text = currentTime;
        }

Answer 1

上面实现的是显示时间，我直接这样改了，不能显示 private void UserNameShow()
        {          
            if (dt.Rows.Count > 0)
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    txtDrawUser.Text = dt.Rows[i][0].ToString() + "  " + dt.Rows[i][1].ToString();
                    
                    txtDrawUser.InvalidateArrange();                  
                    System.Threading.Thread.Sleep(1000);
                }
            }
        }
  private void DrawText()
        {
            UserNameShow();
}

Answer 2

没人回的，还是自己来算了，以下代码：
具体方法是使用另一个线程将数据取出，使用代理将数据显示 private void btnDrawing_Click(object sender, RoutedEventArgs e)
        {
            getdata();
            BeginDrawText(); 
        }        private void button1_Click(object sender, RoutedEventArgs e)
        {
            stopFlag = true;
            DataFlag = true;
        }        /// <summary>
        /// 取得人员名单
        /// </summary>
        private void getdata()
        {
            getscnstr();
            string SqlStr = "SELECT Code,Name FROM DW_User";
            dt = acc.GetSereachData(scn, SqlStr);
        }
        /// <summary>
        /// 此方法为在线程内直接刷新UI，使TEXTBox刷新。//此方法无效
        /// </summary>
        private void UserNameShow()
        {          
            if (dt.Rows.Count > 0)
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    txtDrawUser.Text = dt.Rows[i][0].ToString() + "  " + dt.Rows[i][1].ToString();                    
                    txtDrawUser.InvalidateArrange();                  
                    System.Threading.Thread.Sleep(200);
                }
            }
        }        #region//使用委托显示TextBox的内容
        private void BeginDrawText()
        {
            stopFlag = false;
            Thread thread = new Thread(new
            ThreadStart(refreshText));
            thread.Start();  
        }        private delegate void DelegateDrawText();
        private bool stopFlag = false;
        private void refreshText()
        {
            while (!stopFlag)
            {
                //向UI界面更新显示 
                Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.SystemIdle,
                new DelegateDrawText(DrawText));
            }
        }
        
        private void DrawText()
        {
        //    String currentTime = System.
        //        DateTime.Now.ToString();
        //    txtDrawUser.Text = currentTime;//此实例显示为当前时间            //UserNameShow();
            txtDrawUser.Text = drawtext;
        }
        #endregion
        /// <summary>
        /// /////////////////////////以下使用线程更新TextBox的数据，旨在得出TextBox在何时需要显示何数据
        /// </summary>        
        private bool DataFlag = false;
        private void refDataText()
        {
            DataFlag = false;
            Thread thread = new Thread(new
            ThreadStart(SetData));
            thread.Start();  
        }
        private void SetData()
        {
            while (!DataFlag)
            {
                        for (int i = 0; i < dt.Rows.Count; i++)
                        {
                            drawtext = dt.Rows[i][0].ToString() + "  " + dt.Rows[i][1].ToString();                            
                            System.Threading.Thread.Sleep(300);
                        }       
            }
        }