如何以其他形式保存委托列表值 [英] How to save delegate list values in other form

问题描述

我有一个主要表单，当我点击按钮一个表单1时有按钮n和类似于单击2按钮时表单2

所以我能够将表单1中的值传递给表格2但是当表格1关闭时，价值会回到0



我尝试过：



公共委托void abc（list< string> p1）



表格2 f =新表格2（）;

Abc del = new Abc（f.Fpass）;

Del（lst）;



表格2



Public void Fpass（list< string> p2）{pvalue。添加（p2.ToArray（））;

}

I have a main form which has buttons n when i click on button one form 1 and similar to it form 2 when 2 button is clicked
So I was able to pass value from form 1 to form 2 but when form 1 is closed values come back to 0

What I have tried:

Public delegate void abc(list<string > p1)

Form 2 f =new form 2();
Abc del =new Abc(f. Fpass) ;
Del(lst) ;

In Form 2

Public void Fpass( list<string > p2) {pvalue. Add(p2. ToArray() ) ;
}

推荐答案

上面是关于如何在Form的构造函数中传递变量的Google搜索链接...



或者，如果这种方法不合适，即：初始化后需要传递值，那么下面的例子就可以解决这个问题：



第二表格（接收方）：

Above is a Google Search link on how to pass variables in the Form's constructor...

Alternatively, if this approach is not suitable, ie: values need to be passed after initialization, then the following example will do the trick:

Second Form (receiver):

using System.Windows.Forms;

namespace WFPassVariablesBetweenForms
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        public void SetValue(string text)
        {
            textBox1.Text = text;
        }
    }
}

主表格（发件人）：

Main Form (Sender):

using System;
using System.Data;
using System.Linq;
using System.Windows.Forms;

namespace WFPassVariablesBetweenForms
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            var xxx = new Form2();
            xxx.Show();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            var xxx = Application.OpenForms.Cast<Form>().Where(x => x.Name == "Form2").FirstOrDefault();
            ((Form2)xxx).SetValue(textBox1.Text);
        }
    }
}

这个解决方案的危险在于它是紧密绑定的。可以针对松散依赖进行重构，但这不是本示例的目的。

The danger with this solution isthat it is tightly bound. Can be refactored for loose dependency but that is not the purpose of this example.

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