c#多線程更新窗口(winform)GUI的數據

1. 在.net framwork 2.0中，能夠經過如下代碼來實現:

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private delegate void SetControlPropertyThreadSafeDelegate(Control control, string propertyName, object propertyValue); public static void SetControlPropertyThreadSafe(Control control, string propertyName, object propertyValue) {    if (control.InvokeRequired)    {      control.Invoke( new SetControlPropertyThreadSafeDelegate(SetControlPropertyThreadSafe), new object [] { control, propertyName, propertyValue });    }    else    {      control.GetType().InvokeMember(propertyName, BindingFlags.SetProperty, null , control, new object [] { propertyValue });    } }

  調用方式以下:  

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// thread-safe equivalent of // myLabel.Text = status; SetControlPropertyThreadSafe(myLabel, "Text" , status);

2.在.net 3.0或者更新的版本中，你能夠重寫上面的方法做爲一個Control類的擴展方法，能夠簡化調用方式，具體代碼以下:  

1	myLabel.SetPropertyThreadSafe( "Text" , status);

 在.net 3.0以上的版本完整的調用步驟以下:

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private delegate void SetPropertyThreadSafeDelegate<TResult>(Control @ this , Expression<Func<TResult>> property, TResult value); public static void SetPropertyThreadSafe<TResult>( this Control @ this , Expression<Func<TResult>> property, TResult value) {    var propertyInfo = (property.Body as MemberExpression).Member as PropertyInfo;    if (propertyInfo == null ||        !@ this .GetType().IsSubclassOf(propertyInfo.ReflectedType) ||        @ this .GetType().GetProperty(propertyInfo.Name, propertyInfo.PropertyType) == null )    {      throw new ArgumentException( "The lambda expression 'property' must reference a valid property on this Control." );    }    if (@ this .InvokeRequired)    {      @ this .Invoke( new SetPropertyThreadSafeDelegate<TResult>(SetPropertyThreadSafe), new object [] { @ this , property, value });    }    else    {      @ this .GetType().InvokeMember(propertyInfo.Name, BindingFlags.SetProperty, null , @ this , new object [] { value });    } }

   經過使用LINQ和lambda表達式使代碼更加簡潔:  

1	myLabel.SetPropertyThreadSafe(() => myLabel.Text, status); // status has to be a string or this will fail to compile

3.最簡單的匿名方法調用:

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///...blah blah updating files string newText = "abc" ; // running on worker thread this .Invoke((MethodInvoker) delegate {      someLabel.Text = newText; // runs on UI thread }); ///...blah blah more updating files

以上方法蒐集自網絡，僅供參考。

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本文標題:c#多線程更新窗口(winform)GUI的數據