如何在.NET中的父线程上调用函数? [英] How to invoke a function on parent thread in .NET?
问题描述
我有一个.NET类库，其中包含一个类，该类具有执行一些冗长的操作的方法.客户端调用此方法时，应在新线程上执行冗长的操作，以避免阻塞调用方.但是一旦方法完成，它应该在主线程上执行一些代码.在WinForms应用程序中，我可以使用System.Windows.Forms.Control.Invoke方法，但这不是我的情况.那么如何在C#中实现呢?
I have a .NET class library containing a class with a method that performs some lengthy operation. When a client calls this method it should perform the lengthy operation on a new thread in order to avoid blocking the caller. But once the method finishes it should execute some code on the main thread. In a WinForms application I could have used the System.Windows.Forms.Control.Invoke method but this is not my case. So how can I achieve this in C#?
推荐答案
我找到了解决该问题的简单方法:
I found a simple solution to the problem :
我的COM对象的声明如下:
My COM object is declared like this:
public class Runner
{
public void Run(string executable, object processExitHandler)
{
ThreadPool.QueueUserWorkItem(state =>
{
var p = new Process()
{
StartInfo = new ProcessStartInfo()
{
FileName = executable
}
};
p.Start();
while (!p.HasExited)
{
Thread.Sleep(100);
}
state
.GetType()
.InvokeMember(
"call",
BindingFlags.InvokeMethod,
null,
state,
new object[] { null, p.ExitCode }
);
}, processExitHandler);
}
}
在我的HTML页面中，我像这样使用它:
And in my HTML page I use it like this:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head><title>ActiveXRunner</title>
<script type="text/javascript">
function runNotepad() {
var ax = new ActiveXObject('ActiveXRunner.Runner');
ax.Run('c:\\windows\\notepad.exe', h);
}
function h(exitCode) {
alert('exitCode = ' + exitCode);
}
</script>
</head>
<body>
<a href="#" onclick="runNotepad();">Run notepad and show exit code when finished</a>
</body>
</html>
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