本文实例讲述了WinForm单例窗体。分享给大家供大家参考，具体如下：
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using System;using System.Collections.Generic;using System.Windows.Forms;using System.Text;namespace Common{ /// <summary> /// 窗体的单例模式 /// </summary> /// <typeparam name="T"></typeparam> public class FormSingle<T> where T : Form, new() { private static T form; private static IList<T> list { get; set; } public static T GetForm(T t1) { //检查是否存在窗体 if (!IsExist(t1)) { CreateNewForm(t1); } return form; } /// <summary>释放对象 /// </summary> /// <param name="obj"></param> /// <param name="args"></param> private static void Display(object obj, FormClosedEventArgs args) { form = null; list.Remove(form); } /// <summary>创建新窗体 /// </summary> private static void CreateNewForm(T t1) { form = t1; form.FormClosed += new FormClosedEventHandler(Display);//订阅窗体的关闭事件，释放对象 } /// <summary> /// 是否存在该窗体 /// </summary> /// <param name="T1"></param> /// <returns></returns> private static bool IsExist(T T1) { if (list == null) { list=new List<T>(); list.Add(T1); return false; } //如果窗体的文本相同则认为是同一个窗体 foreach (var t in list) { if (t.Text == T1.Text) return true; } list.Add(T1); return false; } }} |
调用如下：
不带参数的构造函数
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Customer.AddCustomer customer = Common.FormSingle<Customer.AddCustomer>.GetForm(new Customer.AddCustomer());customer.MdiParent = this;//Mdi窗体customer.WindowState = FormWindowState.Maximized;//最大化customer.Show();customer.Activate(); |
带参数的构造函数
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Customer.AddCustomer customer = Common.FormSingle<Customer.AddCustomer>.GetForm(new Customer.AddCustomer(customerid));customer.MdiParent = this;customer.WindowState = FormWindowState.Maximized;customer.Show();customer.Activate(); |
希望本文所述对大家C#程序设计有所帮助。
