1. 在.net framwork 2.0中，可以通过以下代码来实现:
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 });
}
} 调用方式如下:
// thread-safe equivalent of
// myLabel.Text = status;
SetControlPropertyThreadSafe(myLabel, "Text", status);
2.在.net 3.0或者更新的版本中，你可以重写上面的方法作为一个Control类的扩展方法，可以简化调用方式，具体代码如下:
myLabel.SetPropertyThreadSafe("Text", status); 在.net 3.0以上的版本完整的调用步骤如下:
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 });
}
} 通过使用LINQ和lambda表达式使代码更加简洁:
myLabel.SetPropertyThreadSafe(() => myLabel.Text, status); // status has to be a string or this will fail to compile
3.最简单的匿名方法调用:
///...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 以上方法搜集自网络，仅供参考。
