应为 C# 方法名称
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C# method name expected
提问by Usher
I just trying to pass some values but it's throwing an error all the time. Can some one correct me what I am missing here?
我只是想传递一些值，但它一直在抛出错误。有人可以纠正我在这里缺少的东西吗？
Am getting error here
在这里出错
Thread t_PerthOut = new Thread(new ThreadStart(ReadCentralOutQueue("test"));
I want to pass this string value to ReadCentralOutQueue.
我想将此字符串值传递给ReadCentralOutQueue.
class Program
{
public void Main(string[] args)
{
Thread t_PerthOut = new Thread(new ThreadStart(ReadCentralOutQueue("test"));
t_PerthOut.Start();
}
public void ReadCentralOutQueue(string strQueueName)
{
System.Messaging.MessageQueue mq;
System.Messaging.Message mes;
string m;
while (true)
{
try
{
}
else
{
Console.WriteLine("Waiting for " + strQueueName + " Queue.....");
}
}
}
catch
{
m = "Exception Occured.";
Console.WriteLine(m);
}
finally
{
//Console.ReadLine();
}
}
}
}
采纳答案by Jon Skeet
This code:
这段代码：
Thread t_PerthOut = new Thread(new ThreadStart(ReadCentralOutQueue("test"));
tries to call ReadCentralOutQueueand thencreate a delegate from the result. That isn't going to work, because it's a void method. Normally you'd use a method groupto create a delegate, or an anonymous functionsuch as a lambda expression. In this case a lambda expression will be easiest:
尝试调用ReadCentralOutQueue，然后根据结果创建一个委托。那是行不通的，因为它是一个 void 方法。通常，您会使用方法组来创建委托或匿名函数，例如 lambda 表达式。在这种情况下，lambda 表达式将是最简单的：
Thread t_PerthOut = new Thread(() => ReadCentralOutQueue("test"));
You can't just use new Thread(ReadCentralOutQueue)as the ReadCentralOutQueuedoesn't match the signature for either ThreadStartor ParameterizedThreadStart.
您不能只使用 ，new Thread(ReadCentralOutQueue)因为 与或ReadCentralOutQueue的签名不匹配。ThreadStartParameterizedThreadStart
It's important that you understand whyyou're getting this error, as well as how to fix it.
了解为什么会出现此错误以及如何修复它，这一点很重要。
EDIT: Just to prove it doeswork, here's a short but complete program:
编辑：为了证明它确实有效，这里有一个简短但完整的程序：
using System;
using System.Threading;
class Program
{
public static void Main(string[] args)
{
Thread thread = new Thread(() => ReadCentralOutQueue("test"));
thread.Start();
thread.Join();
}
public static void ReadCentralOutQueue(string queueName)
{
Console.WriteLine("I would read queue {0} here", queueName);
}
}
回答by ChrisWue
You have to do it like this:
你必须这样做：
var thread = new Thread(ReadCentralOutQueue);
thread.Start("test");
Also ParameterizedThreadStartexpects a delegate which takes an objectas parameter so you need to change your signature to this:
还ParameterizedThreadStart需要一个接受objectas 参数的委托，因此您需要将签名更改为：
public static void ReadCentralOutQueue(object state)
{
var queueName = state as string;
...
}
回答by Robert Rouhani
Parameters are not allowed as part of the ThreadStart delegate. There are several other solutions to passing a parameter to a new thread, discussed here: http://www.yoda.arachsys.com/csharp/threads/parameters.shtml
不允许将参数作为 ThreadStart 委托的一部分。还有其他几种将参数传递给新线程的解决方案，这里讨论：http: //www.yoda.arachsys.com/csharp/threads/parameters.shtml
But the one that would probably be simplest in your case is the anonymous method:
但是在您的情况下可能最简单的是匿名方法：
ThreadStart starter = delegate { Fetch (myUrl); };
new Thread(starter).Start();
