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【CSharp】通过反射获取当前工程中的所有窗体并打开

作者:炳炎 / 发布于2015/1/26/ 1000


	using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Windows.Forms;

	namespace TestAppHelperMSDNSample
	{
	 static class Program
	 {
	 /// <summary>
	 /// The main entry point for the application.
	 /// </summary>
	 [STAThread]
	 static void Main()
	 {
	 Application.EnableVisualStyles();
	 Application.SetCompatibleTextRenderingDefault(false);

	 Form startup = new Form();
	 startup.Text = "Choose a form to run";
	 startup.Size = new System.Drawing.Size(300, 300);
	 startup.StartPosition = FormStartPosition.CenterScreen;
	 startup.Load += new EventHandler(startup_Load);

	 ComboBox cboForms = new ComboBox();
	 cboForms.Name = "cboForms";
	 cboForms.DropDownStyle = ComboBoxStyle.DropDownList;
	 cboForms.Size = new System.Drawing.Size(250, 20);
	 cboForms.Location = new System.Drawing.Point(25, 75);
	 startup.Controls.Add(cboForms);

	 Button btnOpenForm = new Button();
	 btnOpenForm.Text = "Open Form";
	 btnOpenForm.Size = new System.Drawing.Size(100, 30);
	 btnOpenForm.Location = new System.Drawing.Point(100, 150);
	 btnOpenForm.Click += new EventHandler(btnOpenForm_Click);
	 startup.Controls.Add(btnOpenForm);

	 Application.Run(startup);
	 }

	 static void btnOpenForm_Click(object sender, EventArgs e)
	 {
	 ComboBox cbo = ((sender as Button).Parent as Form).Controls["cboForms"] as ComboBox;

	 Properties.Settings.Default.LastFormFullName = cbo.SelectedItem.ToString();
	 Properties.Settings.Default.Save();
	
	 Form f = Activator.CreateInstance(Type.GetType(cbo.SelectedItem.ToString())) as Form;
	 f.ShowDialog();
	 }

	 static void startup_Load(object sender, EventArgs e)
	 {
	 ComboBox cbo = ((sender as Form).Controls["cboForms"] as ComboBox);

	 // load all the Forms in executing assembly
	 Type[] types = System.Reflection.Assembly.GetExecutingAssembly().GetExportedTypes();
	 foreach (Type t in types)
	 {
	 if (t.BaseType == typeof(Form))
	 {
	 cbo.Items.Add(t.FullName);
	 }
	 }

	 // select the last used
	 if (!string.IsNullOrEmpty(Properties.Settings.Default.LastFormFullName))
	 {
	 if(cbo.Items.Contains(Properties.Settings.Default.LastFormFullName))
	 {
	 int index = cbo.FindString(Properties.Settings.Default.LastFormFullName);
	 if (index >= 0)
	 cbo.SelectedIndex = index;
	 }
	 }
	 }
	 }
	}

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