.net窗体之间传值几种方法详解

作者:袖梨 2022-06-25
1、父窗体传值给子窗体
在父窗体中写:
FormChild fc = new FormChil();//新建一个子窗体
fc.ShowDialog(this);//以上两句即实现了子窗体和父窗体的联系
textBox2.Text = fc.Str1;//已实现联系,可以传值
2、子窗体传值给父窗体
有两种方法:
 (1) 在子窗体中写:
     FormParent fp = (FormParent)this.Owner;//实现联系
     textBox1.Text = fp.Str1;//已实现联系,可以传值
  (2)运用子窗体的构造函数将父窗体的值传入(代码如下),可传一两个父窗体的值,如果要传的值多可以用ArrayList,也可直接传窗体(示例代码直接传窗体)
总结:抓住窗体对象和要传具体值的联系
代码:
Form1.cs
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace TestTransValue
{
public partial class Form1 : Form
{
private string form1Text;

public string Form1Text
{
get { return form1Text; }
set { form1Text = value; }
}
public Form1()
{
InitializeComponent();
form1Text = "这是来自Form1的Text";
}

private void Form1_Load(object sender, EventArgs e)
{

}

private void button1_Click(object sender, EventArgs e)
{
Form2 f2 = new Form2();
f2.ShowDialog(this);
textBox1.Text = f2.Form2Text;//以上三句即可实现从子窗体向父窗体的传值
}

private void button2_Click(object sender, EventArgs e)
{
Form3 f3 = new Form3(this);
f3.ShowDialog(this);
textBox2.Text = f3.Form3Text;//以上三句即可实现从子窗体向父窗体的传值
}
}
}
Form2.cs
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 TestTransValue
{
public partial class Form2 : Form
{
private string form2Text = "这是来自form2的Text";

public string Form2Text
{
get { return form2Text; }
set { form2Text = value; }
}
public Form2()
{
InitializeComponent();
}

private void Form2_Load(object sender, EventArgs e)
{

}

private void button1_Click(object sender, EventArgs e)
{
Form1 f1 = (Form1)this.Owner;
textBox1.Text = f1.Form1Text;//以上两句即可实现子窗体获取父窗体的值(需要在父窗体中声明)
}
}
}
Form3.cs
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 TestTransValue
{
public partial class Form3 : Form
{
private string form3Text = "这是来自form3的Text";
Form1 f1;

public string Form3Text
{
get { return form3Text; }
set { form3Text = value; }
}

public Form3(Form1 form1)
{
InitializeComponent();
f1 = form1;
}

private void Form3_Load(object sender, EventArgs e)
{

}

private void button1_Click(object sender, EventArgs e)
{
textBox1.Text = f1.Form1Text;
}
}
}

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