dplayconnect_serviceproviderform.cs

《.NET游戏编程入门经典－c#篇》

//-----------------------------------------------------------------------------
// File: DPlayConnect_ServiceProviderForm.cs
//
// Desc: Application class for the DirectPlay samples framework.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
using System;
using System.Collections;
using System.Windows.Forms;
using Microsoft.DirectX;
using Microsoft.DirectX.DirectPlay;



/// <summary>
/// This form allows you to choose a service provider and username for your 
/// sample
/// </summary>
public class ChooseServiceProviderForm : System.Windows.Forms.Form {
	private Peer peer;
	private ConnectWizard connectionWizard;
	private System.Windows.Forms.Label label1;
	private System.Windows.Forms.ListBox lstSP;
	private System.Windows.Forms.Button btnOK;
	private System.Windows.Forms.Label label2;
	private System.Windows.Forms.TextBox txtUser;
	private System.Windows.Forms.Button btnCancel;




	/// <summary>
	/// Constructor
	/// </summary>
	public ChooseServiceProviderForm(Peer peerObject, ConnectWizard connectionWizard) {
		//
		// Required for Windows Form Designer support
		//
		InitializeComponent();
		peer = peerObject;
		this.connectionWizard = connectionWizard;
		this.Text = connectionWizard.SampleName + " - " + this.Text;
		// Fill up our listbox with the service providers
		ServiceProviderInformation[] serviceProviders = peer.GetServiceProviders(false);
		foreach (ServiceProviderInformation info in serviceProviders)
			lstSP.Items.Add(info);

		txtUser.Text = null;
		//Get the default username from the registry if it exists
		Microsoft.Win32.RegistryKey regKey = Microsoft.Win32.Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\DirectX\\SDK\\csDPlay");
		if (regKey != null) {
			try {
				txtUser.Text = (string)regKey.GetValue("DirectPlayUserName", null);
				lstSP.SelectedIndex = (int)regKey.GetValue("DirectPlaySPIndex", 0);
				regKey.Close();
			}
			catch {
				txtUser.Text = null;
				lstSP.SelectedIndex = 0;
			}
		}
		else
			lstSP.SelectedIndex = 0;

		if ((txtUser.Text == null) || (txtUser.Text == "")) {
			txtUser.Text = SystemInformation.UserName;
		}
	}




	/// <summary>
	/// Clean up any resources being used.
	/// </summary>
	protected override void Dispose(bool Disposing) {
		base.Dispose(Disposing);
	}




	#region Windows Form Designer generated code
	/// <summary>
	/// Required method for Designer support - do not modify
	/// the contents of this method with the code editor.
	/// </summary>
	private void InitializeComponent() {
		this.lstSP = new System.Windows.Forms.ListBox();
		this.txtUser = new System.Windows.Forms.TextBox();
		this.btnOK = new System.Windows.Forms.Button();
		this.btnCancel = new System.Windows.Forms.Button();
		this.label1 = new System.Windows.Forms.Label();
		this.label2 = new System.Windows.Forms.Label();
		this.SuspendLayout();
		// 
		// lstSP
		// 
		this.lstSP.Location = new System.Drawing.Point(12, 63);
		this.lstSP.Name = "lstSP";
		this.lstSP.Size = new System.Drawing.Size(324, 147);
		this.lstSP.TabIndex = 1;
		this.lstSP.DoubleClick += new System.EventHandler(this.lstSP_DoubleClick);
		// 
		// txtUser
		// 
		this.txtUser.Location = new System.Drawing.Point(13, 20);
		this.txtUser.MaxLength = 30;
		this.txtUser.Name = "txtUser";
		this.txtUser.Size = new System.Drawing.Size(326, 20);
		this.txtUser.TabIndex = 5;
		this.txtUser.Text = "";
		// 
		// btnOK
		// 
		this.btnOK.DialogResult = System.Windows.Forms.DialogResult.OK;
		this.btnOK.Location = new System.Drawing.Point(181, 215);
		this.btnOK.Name = "btnOK";
		this.btnOK.Size = new System.Drawing.Size(74, 27);
		this.btnOK.TabIndex = 2;
		this.btnOK.Text = "OK";
		this.btnOK.Click += new System.EventHandler(this.btnOK_Click);
		// 
		// btnCancel
		// 
		this.btnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
		this.btnCancel.Location = new System.Drawing.Point(260, 215);
		this.btnCancel.Name = "btnCancel";
		this.btnCancel.Size = new System.Drawing.Size(74, 27);
		this.btnCancel.TabIndex = 3;
		this.btnCancel.Text = "Cancel";
		this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click);
		// 
		// label1
		// 
		this.label1.Location = new System.Drawing.Point(11, 44);
		this.label1.Name = "label1";
		this.label1.Size = new System.Drawing.Size(376, 19);
		this.label1.TabIndex = 0;
		this.label1.Text = "Please pick your service provider:";
		// 
		// label2
		// 
		this.label2.Location = new System.Drawing.Point(10, 5);
		this.label2.Name = "label2";
		this.label2.Size = new System.Drawing.Size(327, 12);
		this.label2.TabIndex = 4;
		this.label2.Text = "User Name:";
		// 
		// ChooseServiceProviderForm
		// 
		this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
		this.AcceptButton = this.btnOK;
		this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
		this.CancelButton = this.btnCancel;
		this.ClientSize = new System.Drawing.Size(343, 246);
		this.ControlBox = false;
		this.Controls.AddRange(new System.Windows.Forms.Control[] {
																	  this.txtUser,
																	  this.label2,
																	  this.btnCancel,
																	  this.btnOK,
																	  this.lstSP,
																	  this.label1});
		this.MaximizeBox = false;
		this.MinimizeBox = false;
		this.Name = "ChooseServiceProviderForm";
		this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
		this.Text = "Choose Service Provider";
		this.ResumeLayout(false);

	}
	#endregion




	/// <summary>
	/// They don't want to run this sample
	/// </summary>
	private void btnCancel_Click(object sender, System.EventArgs e) {
		this.Dispose();
	}




	/// <summary>
	/// Same as clicking ok
	/// </summary>
	private void lstSP_DoubleClick(object sender, System.EventArgs e) {
		// Call the ok button click handler
		object[] parameters = new object[] { sender, e };
		this.BeginInvoke(new System.EventHandler(btnOK_Click), parameters);
	}




	/// <summary>
	/// Select this username and service provider if valid, then continue the wizard
	/// </summary>
	private void btnOK_Click(object sender, System.EventArgs e) {

		if ((txtUser.Text == null) || (txtUser.Text == "")) {
			MessageBox.Show(this,"Please enter a username before clicking OK.","No Username",MessageBoxButtons.OK,MessageBoxIcon.Information);
			return;
		}
		try {
			connectionWizard.ServiceProvider = ((ServiceProviderInformation)lstSP.SelectedItem).Guid;
			connectionWizard.Username = txtUser.Text;
		}
		catch { // We assume if we got here there was no selected item.
			MessageBox.Show(this,"Please select a service provider before clicking OK.","No Service Provider",MessageBoxButtons.OK,MessageBoxIcon.Information);
			return;
		}

		Microsoft.Win32.RegistryKey regKey = Microsoft.Win32.Registry.CurrentUser.CreateSubKey("Software\\Microsoft\\DirectX\\SDK\\csDPlay");
		if (regKey != null) {
			regKey.SetValue("DirectPlayUserName", txtUser.Text);
			regKey.SetValue("DirectPlaySPIndex", lstSP.SelectedIndex);
			regKey.Close();
		}
		this.Dispose();
	}
}