publicpartialclassForm1:Form{publicForm1(){InitializeComponent();//方法1：不进行跨线程安全检查//System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls=false;}privatevoidbutton1_Click(objectsender,EventArgse){Threadth1=newThread(newThreadStart(CalNum));th1.Start();}privatevoidCalNum(){//button1.Enabled=false;intresult=0;for(inti=1;i<100000000;i++){result+=i;}SetCalResult(result);//button1.Enabled=true;}//方法2：检查是否跨线程，然后将方法加入委托，调用委托publicdelegatevoidSetTextHandler(intresult);privatevoidSetCalResult(intresult){if(label2.InvokeRequired==true){SetTextHandlerset=newSetTextHandler(SetCalResult);//委托的方法参数应和SetCalResult一致label2.Invoke(set,newobject[]{result});//此方法第二参数用于传入方法,代替形参result}else{label2.Text=result.ToString();}}}
