C#之跨线程访问控件属性

在窗体设计中,会经常遇到跨线程访问窗体控件,如果直接访问会报错,那怎么办呢?直接上代码

代码为一个类,实际运用的时候直接实例化调用即可

  1 class CrossThreadUpdateUIClass
  2     {
  3        
  4             public void ChangeBtnTxt(Button Btn, string Str)
  5             {
  6                 Action<Button, string> DoAction = delegate (Button btn, string str)
  7                 {
  8 
  9                     if (btn.InvokeRequired)
 10                     {
 11                         btn.Text = str;
 12                         //btn.BackColor = ; ; ;
 13                     }
 14                     else
 15                     {
 16                         btn.Text = str;
 17                     }
 18                 };
 19             Btn.Invoke(DoAction, Btn, Str);
 20 
 21 
 22         }
 23             public void ChangeLabelTxt(Label Lb, string Str)
 24             {
 25 
 26                 Action<Label, string> DoAction = delegate (Label lb, string str)
 27                 {
 28 
 29 
 30                     if (lb.InvokeRequired)
 31                     {
 32                         lb.Text = str;
 33                         //btn.BackColor = ; ; ;
 34                     }
 35                     else
 36                     {
 37                         lb.Text = str;
 38 
 39                     }
 40 
 41                 };
 42 
 43                 Lb.Invoke(DoAction, Lb, Str);
 44 
 45             }
 46             public void ChangeControllTxt(Control Ctl, string Str)
 47             {
 48                 Action<Control, string> DoAction = delegate (Control ctl, string str)
 49                 {
 50 
 51 
 52                     if (ctl.InvokeRequired)
 53                     {
 54                         ctl.Text = str;
 55                         //btn.BackColor = ; ; ;
 56                     }
 57                     else
 58                     {
 59                         ctl.Text = str;
 60 
 61                     }
 62 
 63                 };
 64 
 65                 Ctl.Invoke(DoAction, Ctl, Str);
 66 
 67             }
 68             public void ChangeUserLabelValue(UserLabel userlabel, string text)
 69             {
 70                 Action<UserLabel, string> DoAction = delegate (UserLabel usl, string str)
 71                 {
 72                 
 73 
 74                     if (usl.InvokeRequired)
 75                     {
 76                         usl.Text = str;
 77                         if(str=="PASS")
 78                         {
 79                             usl.BackColor = Color.Green;
 80                         }
 81                        else if(str == "FAIL")
 82                         {
 83                             usl.BackColor = Color.Red;
 84                         }
 85                     }
 86                     else
 87                     {
 88                         usl.Text = str;
 89                         if (str == "PASS")
 90                         {
 91                             usl.BackColor = Color.Green;
 92                         }
 93                         else if (str == "FAIL")
 94                         {
 95                             usl.BackColor = Color.Red;
 96                         }
 97                     }
 98 
 99                 };
100 
101             userlabel.Invoke(DoAction, userlabel, text);
102 
103             }
104             
105             public void UpdateControlAsync(Action act)
106             {
107                 Task task = new Task(act);
108 
109                 task.Start();
110             }
111       }