使用其他方法C#中的变量 [英] use variable from other method C#

问题描述

C#编程的新手，非常缺乏经验

new to C# programming and very unexperienced

我正在创建一个带有文本框的表单，我希望我的程序在一个方法中读取该框中的数字，并在其他方法中使用这些数字执行操作，这就是现在的样子

i'm creating a form with a text box, i want my program to read numbers in that box in a method, and execute operation with those numbers in other method, here's how it is by now

    public void readG_TextChanged(object sender, EventArgs e)
    {
        string _G = readG.Text;
        decimal _Gd = Convert.ToDecimal(_G);
    }

    public void readQ_TextChanged(object sender, EventArgs e)
    {
        string _Q = readQ.Text;
        decimal _Qd = Convert.ToDecimal(_Q);
    }
    private void button1_Click(object sender, EventArgs e)
    {
        decimal _ULS = (1.35m * _Gd + 1.5m * _Qd);
        Console.WriteLine("{0}",_ULS);
    }

readQ，readG是方框名称 button1是继续进行操作并在控制台上显示的按钮

readQ, readG are the boxes names button1 is the button to proceed to the operation, and display it on a console

到目前为止，我在button1_click方法中没有_Gd和_Qd上下文，此外，我认为它将运行得很好

so far i have the _Gd and _Qd out of context in the button1_click method, besides that i think it will run pretty fine

推荐答案

您应该阅读有关范围界定的信息...

You should read up on scoping... http://msdn.microsoft.com/en-us/library/ms973875.aspx

一种方法是将_Qd和_Gd置于类级别，而不是在方法本身中定义，以便您可以在click方法中访问它们.

One way is for your _Qd and _Gd to be at the class level, not defined within the methods themselves, so that you have access to them in the click method.

private decimal _Gd;
private decimal _Qd;
public void readG_TextChanged(object sender, EventArgs e)
{
    string _G = readG.Text;
    _Gd = Convert.ToDecimal(_G);
}

public void readQ_TextChanged(object sender, EventArgs e)
{
    string _Q = readQ.Text;
    _Qd = Convert.ToDecimal(_Q);
}
private void button1_Click(object sender, EventArgs e)
{
    decimal _ULS = (1.35m * _Gd + 1.5m * _Qd);
    Console.WriteLine("{0}",_ULS);
}

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