标签:winform http 使用 io 数据 for ar art
1. 在.net framwork 2.0中,可以通过以下代码来实现:
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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 });
}
}
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调用方式如下:
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// thread-safe equivalent of
// myLabel.Text = status;
SetControlPropertyThreadSafe(myLabel,
"Text"
, status);
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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:
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myLabel.SetPropertyThreadSafe(
"Text"
, status);
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在.net 3.0以上的版本完整的调用步骤如下:
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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 });
}
}
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通过使用LINQ和lambda表达式使代码更加简洁:
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myLabel.SetPropertyThreadSafe(() => myLabel.Text, status);
// status has to be a string or this will fail to compile
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3.最简单的匿名方法调用:
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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
|
以上方法搜集自网络,仅供参考。
转载请注明:文章转载自:[169IT-最新最全的IT资讯]
本文标题:c#多线程更新窗口(winform)GUI的数据
c#多线程更新窗口(winform)GUI的数据,布布扣,bubuko.com
标签:winform http 使用 io 数据 for ar art
原文地址:http://my.oschina.net/u/1766067/blog/300105