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问题描述

在类中,我有2个方法。在method1中,我创建了一个对象,但我不能在method2中使用相同的对象。



为什么?请帮助一个简单的例子。



编码太大,所以我给出了布局

  public class Sub 
{
}

public class DataLoader
{
public void process1()
{
Sub obj = new Sub();
}

public void process2()
{
//这里我不能使用对象
}
}


解决方案

这样做的原因是。只能从所声明的块中访问 。要从多个方法访问它,请添加字段或将其作为 >

code> class YourClass
{
object yourObject;

void Method1()
{
yourObject = new object();
}

void Method2()
{
int x = yourObject.GetHashCode();
}
}

参数: p>

  class YourClass 
{
void Method1()
{
Method2 ());
}

void Method2(object theObject)
{
int x = theObject.GetHashCode();
}
}


In a class, I have 2 methods. In method1 I created an object, but I can't use the same object in method2.

Why? Please help with a simple example.

The coding is too big, so I have given the layout

public class Sub
{
}

public class DataLoader
{
    public void process1()
    {
        Sub obj = new Sub();
    }

    public void process2()
    {
        // here I can't use the object
    }
}
解决方案

The reason why this isn't working is scope. A local variable can only be accessed from the block it is declared in. To access it from multiple methods, add a field or pass it to the other method as a parameter.

Field:

class YourClass
{
    object yourObject;

    void Method1()
    {
        yourObject = new object();
    }

    void Method2()
    {
        int x = yourObject.GetHashCode();
    }
}

Parameter:

class YourClass
{
    void Method1()
    {
        Method2(new object());
    }

    void Method2(object theObject)
    {
        int x = theObject.GetHashCode();
    }
}

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09-02 15:13