C# 线程 -ThreadStart 委托
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C# Threads -ThreadStart Delegate
提问by user215675
The execution of the following code yields error :No overloads of ProcessPerson Matches ThreadStart.
以下代码的执行产生错误：ProcessPerson 没有重载匹配 ThreadStart。
public class Test
{
static void Main()
{
Person p = new Person();
p.Id = "cs0001";
p.Name = "William";
Thread th = new Thread(new ThreadStart(ProcessPerson));
th.Start(p);
}
static void ProcessPerson(Person p)
{
Console.WriteLine("Id :{0},Name :{1}", p.Id, p.Name);
}
}
public class Person
{
public string Id
{
get;
set;
}
public string Name
{
get;
set;
}
}
How to fix it?
如何解决？
采纳答案by Jon Skeet
Firstly, you want ParameterizedThreadStart- ThreadStartitself doesn't have any parameters.
首先，您想要ParameterizedThreadStart-ThreadStart本身没有任何参数。
Secondly, the parameter to ParameterizedThreadStartis just object, so you'll need to change your ProcessPersoncode to cast from objectto Person.
其次，参数 toParameterizedThreadStart只是object，因此您需要将ProcessPerson代码更改为从objectto 转换Person。
static void Main()
{
Person p = new Person();
p.Id = "cs0001";
p.Name = "William";
Thread th = new Thread(new ParameterizedThreadStart(ProcessPerson));
th.Start(p);
}
static void ProcessPerson(object o)
{
Person p = (Person) o;
Console.WriteLine("Id :{0},Name :{1}", p.Id, p.Name);
}
However, if you're using C# 2 or C# 3 a cleaner solution is to use an anonymous method or lambda expression:
但是，如果您使用的是 C# 2 或 C# 3，一个更简洁的解决方案是使用匿名方法或 lambda 表达式：
static void ProcessPerson(Person p)
{
Console.WriteLine("Id :{0},Name :{1}", p.Id, p.Name);
}
// C# 2
static void Main()
{
Person p = new Person();
p.Id = "cs0001";
p.Name = "William";
Thread th = new Thread(delegate() { ProcessPerson(p); });
th.Start();
}
// C# 3
static void Main()
{
Person p = new Person();
p.Id = "cs0001";
p.Name = "William";
Thread th = new Thread(() => ProcessPerson(p));
th.Start();
}
回答by Richard Nienaber
Your function declaration should look like this:
您的函数声明应如下所示：
static void ProcessPerson(object p)
Inside ProcessPerson, you can cast 'p' to a Personobject.
在里面ProcessPerson，您可以将 'p' 转换为一个Person对象。
