如何使用 { get; 从 form1 到 form2 获取变量放;}? [英] How to get variable from form1 to form2 with { get; set;}?
问题描述
全部.
我是 C# 的新手.我知道这是一个非常受欢迎的问题.但我不明白.我知道有错误,但在哪里?例如 - 代码 Form1 的第一部分包含私有变量 test,我需要在 Form2 中获取此变量的值.错误在哪里?
I'm newbie in C#. I know this is very popular question. But I didn't understand. I know there is a mistake, but where? For example - first part of code Form1 include private variable test, I need to get the value of this variable in the Form2. Where is the error?
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
string test = "test this point";
Form2 dlg = new Form2();
dlg.test = test;
dlg.Show();
}
}
}
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form2 : Form
{
public string test { get; set; }
public Form2()
{
InitializeComponent();
label1.Text = test;
}
}
}
推荐答案
在你的 Form2 中你使用了一个公共属性,因为它是 public
你可以通过 form1 中的对象来分配它.例如:
In your Form2 you are using a public property, because it is public
you can assign it via the object in form1. For example:
private void button1_Click(object sender, EventArgs e)
{
Form2 dlg = new Form2();
dlg.test = "test this point";
dlg.Show();
}
在form 2中有几种方法可以使用它,如果您只想设置标签的text属性,这将是最好的:
There are a couple of ways to use this in form 2, if you just want it to set the text property of the label only, this would be the best:
public partial class Form2 : Form
{
public string test
{
get { return label1.Text; }
set { label1.Text = value ;}
}
public Form2()
{
InitializeComponent();
}
}
如果需要,您还可以在属性的 setter 中调用函数.
Within the setter of the property you could also call a function if required.
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