C# 窗體間傳值總結
1、父窗體傳值給子窗體
#在父窗體中寫:
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、子窗體傳值給父窗體
有兩種方法:
(1) 在子窗體中寫:
FormParent fp = (FormParent)this.Owner;//实现联系 textBox1.Text = fp.Str1;//已实现联系,可以传值
(2)運用子窗體的建構子將父窗體的值傳入(程式碼如下),可傳一兩個父窗體的值,如果要傳的值多可以用ArrayList,也可直接傳窗體(範例程式碼直接傳窗體)
總結:抓住窗體物件和要傳具體值的聯繫
程式碼:
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 } } }
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) } } }
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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