我可以在这个片段中以某种方式用using块替换Initialize()和Close()方法调用吗？

Question

你有没有办法建议帮助摆脱调用Initialize()和Close()方法并将其替换为使用块？

或者这种方法完全没问题？

(想法是确保当FooWriter的消费者写下一些字符串并完成此操作时将处理Writer.)

class Program
    {
        static void Main(string[] args)
        {
            var writer  = new FooWriter();

            writer.Initialize();

            foreach (var s in args)
                writer.Write(s);

            writer.Cose();
    }


public class FooWriter
{

    public StreamWriter Writer;

    public void Initialize()
    {
        Writer = new StreamWriter("MyFile.txt", false);
    }

    public void Write(string line)
    {
        if(Writer==null)
            throw new NullReferenceException(Writer, "Writer"); // Guard Writer

        Writer.WriteLine(line);
    }

    public void Close()
    {
        Writer.Dispose();
    }

}

Answer 1

您可以通过你做FooWriter的IDisposable.并将初始化移动到其构造函数中:

public class FooWriter : IDisposable {

    public StreamWriter Writer;

    public FooWriter()
    {
        Writer = new StreamWriter("MyFile.txt", false);
    }

    public void Write(string line)
    {
        // You do not need to guard the writer, because constructor sets it
        if(Writer==null)
            throw new NullReferenceException(Writer, "Writer"); // Guard Writer

        Writer.WriteLine(line);
    }

    public void Dispose()
    {
        Writer.Dispose();
    }

}