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Winfrom窗体间传值

IP云
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09/27
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1.通过tag属性传输，tag属性是存储与空间密切相关的数据。比如登陆界面的数据传输给主界面。

子窗体                                                                        主窗体

        

定义一个类

namespace FrmLogin{ public class User { public string UserName { set; get; } public string PassWorld { set; get; } }}

子窗体.cs

private void buttonLogin_Click(object sender, EventArgs e) { User user = new User(); user.UserName = this.textBoxName.Text.Trim(); user.PassWorld = this.textBoxPassWorld.Text; this.Tag = user; this.DialogResult = DialogResult.OK; }

父（主）窗体.cs

private void FormMain_Load(object sender, EventArgs e) { FormLogin frm = new FormLogin(); if (frm.ShowDialog() == DialogResult.OK) { User user = frm.Tag as User; this.Text += string.Format("--欢迎您:{0}", user.UserName); } else { frm.Close(); } }

2.创建一个类，相当于创建了全局共享的静态变量，然后大家都来访问这个静态变量。

全局类.cs

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace FrmLogin{ public class ConText { public static User UserLogin = null; }}

子窗体.cs

private void buttonLogin_Click(object sender, EventArgs e) { User user = new User(); user.UserName = this.textBoxName.Text.Trim(); user.PassWorld = this.textBoxPassWorld.Text; //this.Tag = user; ConText.UserLogin = user; this.DialogResult = DialogResult.OK; }

主窗体.cs

private void FormMain_Load(object sender, EventArgs e) { FormLogin frm = new FormLogin(); if (frm.ShowDialog() == DialogResult.OK) { // User user = frm.Tag as User; User user = ConText.UserLogin; this.Text += string.Format("--欢迎您:{0}", user.UserName); } else { frm.Close(); } }

3.利用子窗体tag属性

子窗体.cs

private void buttonLogin_Click(object sender, EventArgs e) { User user = new User(); user.UserName = this.textBoxName.Text.Trim(); user.PassWorld = this.textBoxPassWorld.Text; FormLogin main = this.Owner as FormLogin; if (main == null) { MessageBox.Show("LOGIN窗体没有Owner，请检查代码！！"); } main.Tag = user; this.DialogResult = DialogResult.OK; }

父窗体.cs

private void FormMain_Load(object sender, EventArgs e) { FormLogin frm = new FormLogin(); if (frm.ShowDialog(this) == DialogResult.OK)//这儿一定要加this { User user = this.Tag as User; this.Text += string.Format("--欢迎您:{0}", user.UserName); } else { frm.Close(); } }