C # multithreaded Update window (WinForm) GUI data

1. In. NET Framwork 2.0, the following code can be implemented:

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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 });    } }

The method is called as follows:

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

2. In. NET 3.0 or later, you can override the above method as an extension method of a control class, which can simplify the invocation, with the following code:

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

The complete invocation steps for versions above. NET 3.0 are as follows:

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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 ||        [email protected] 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 });    } }

Make your code more concise by using LINQ and lambda expressions:

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

3. The simplest anonymous method invocation:

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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

The above method collects from the network, only for the reference.

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Article title: C # Multithreaded Update window (WinForm) GUI data