对于Winform软件，不要在线程里操作UI，不要相信：StartForm.CheckForIllegalCrossThreadCalls = false;
于是，把所有的代码都改成主线程委托调用的方式
private delegate void SetTextHandle(string id, string value);private void ThreadSetText(string id, string value){this.Controls.Find(id, true)[0].Text = value;}private void SetText(string id, string value){if (this.InvokeRequired){this.Invoke(new SetTextHandle(ThreadSetText), new object[] { id, value });}else{ThreadSetText(id, value);}}
2
// the canonical form (C# consumer)public delegate void ControlStringConsumer(Control control, string text); // defines a delegate typepublic void SetText(Control control, string text) {if (control.InvokeRequired) {control.Invoke(new ControlStringConsumer(SetText), new object[]{control, text}); // invoking itself} else {control.Text=text;// the "functional part", executing only on the main thread}}
3
public static class ControlHelpers{public static void InvokeIfRequired<T>(this T control, Action<T> action) where T : ISynchronizeInvoke{if (control.InvokeRequired){control.Invoke(new Action(() => action(control)), null);}else{action(control);}}}
Use it like this:
private void UpdateSummary(string text) {summary.InvokeIfRequired(s => {s.Text = text }); }
3
theLabel.Invoke(new Action(() => theLabel.Text = "hello world from worker thread!"));
4
public static void InvokeIfRequired(this Control control, MethodInvoker action){if (control.InvokeRequired) {control.Invoke(action);} else {action();}}
调用：
richEditControl1.InvokeIfRequired(() =>{// Do anything you want with the control hererichEditControl1.RtfText = value;RtfHelpers.AddMissingStyles(richEditControl1);});
更新为:
public static void InvokeIfRequired(this ISynchronizeInvoke obj,MethodInvoker action){if (obj.InvokeRequired) {var args = new object[0];obj.Invoke(action, args);} else {action();}}
考虑仍出现异常时：
while (!control.Visible) {System.Threading.Thread.Sleep(50); }
5
public static void InvokeIfRequired(this Control c, Action<Control> action){if(c.InvokeRequired){c.Invoke(new Action(() => action(c)));}else{action(c);}}
变更为：
public static void InvokeIfRequired<T>(this T c, Action<T> action) where T : Control
调用方法：
object1.InvokeIfRequired(c => { c.Visible = true; });
