Winfrom窗体间传值

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();}}

 

转载于:https://www.cnblogs.com/youthshouting/p/4361036.html

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