C # pass value for the form, the method may be used to delegate. Two new forms form1 and form2,
There is a label1 form1 and Button1;
There is a textbox1 form2 and Button1;
Click form2 realize the value of button1 form2 in textbox1, and pass form1 in label1;
Specific code as follows:
In the form1:
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace WindowsFormsApp1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { Form2 form2 = new Form2(showMsg); form2.Show(); } private void showMsg(string str) { label1.Text = str; } private void Form1_Load(object sender, EventArgs e) { } } }
In the form2
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace WindowsFormsApp1 { public delegate void DelText(string str); public partial class Form2 : Form { public DelText _del; public Form2(DelText del) { this._del = del; InitializeComponent(); } private void Form2_Load(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { this._del(textBox1.Text); } } }