private void startall()
 {
     try
     {
         for (int s = 0; s < j; s++)
         {
             HkAction.Play(handle[s], cameraid1[s], SessionId[s]);
         }
     }
     catch (Exception ex)
     {
         MessageBox.Show("异常" + ex.ToString(), "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
     }
     a = 1;
 }
 private void Start_Play1()
 {
     SessionId[j] = HkAction.AllocSession(); //每次点击存放session
     if (SessionId[j] != null)               //每次播放申请会话
     {
         bool play;
         try
         {
             play = HkAction.Play(handle[0], cameraid1[j], SessionId[j]);
             if (play == true)
             {
                 a = 1;
             }
         }
         catch (Exception ex)
         {
             MessageBox.Show("异常:" + ex.ToString(), "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
         }
     }
     else
     {
         MessageBox.Show("申请会话异常!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
     }
 }