C#设计的一个向导程序（Wizard）框架--VS2008版 （一）

在现实的软件中，经常可以看到一些向导（Wizard）的存在，如何给自己的应用程序实现一个向导呢？
下面是一个使用面向对象的思想设计出来的应用程序向导框架，模拟OutLook配置邮箱。

 其中有三个比较关键的类，一个是向导窗体要收集的信息封装成的类MailInfo，一个是所有向导窗体都要继承的窗体基类MailInfoBase，还有一个就是最关键的类，向导控制类MailInfoController。

有了基类MailInfoBase，设计一个子类窗体非常简单，只需从MailInfoBase类中派生一个新窗体，设计完用户界面之后重写其UpdateInfo()方法即可。

所有代码（VS2008版）如下，通俗易懂，不再做说明：
项目MailControl，输出为类库，其中
MailInfo.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MailControl
{
    public class MailInfo
    {
        public MailInfo()
        {

        }
        public string NickName = "";
        public string UsrName = "";
        public string Email = "";
        public string Password = "";
        public string Pop3Server = "";
        public string SmtpServer = "";
        public string Port = "";
        public bool SPA = false;
    }
}

MailInfoBase.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace MailControl
{
    public partial class MailInfoBase : Form
    {
        public MailInfoBase()
        {
            InitializeComponent();
        }

        public MailInfoController controller = null;

        public void DisableButton()
        {
            if (this.controller == null)
                return;
            if (this.controller.IsFirstForm)
            {
                this.btnGoPrev.Enabled = false;
            }
            else
                this.btnGoPrev.Enabled = true;
            if (this.controller.IsLastForm)
            {
                this.btnGoNext.Enabled = false;
            }
            else
                this.btnGoNext.Enabled = true;
        }

        protected virtual void UpdataInfo()
        {

        }
        protected virtual void GoNext()
        {
            UpdataInfo();
            controller.GoNext();
        }
        protected virtual void GoPrev()
        {
            UpdataInfo();
            controller.GoPrev();
        }
        protected virtual void Finish()
        {
            UpdataInfo();
            controller.FinishWizard();
            this.Visible = false;
        }
        protected virtual void Cancel()
        {
            this.controller.info = null;
            this.Close();
        }

        private void btnGoPrev_Click(object sender, EventArgs e)
        {
            GoPrev();
        }

        private void btnGoNext_Click(object sender, EventArgs e)
        {
            GoNext();
        }

        private void btnOver_Click(object sender, EventArgs e)
        {
            Finish();
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            Cancel();
        }
    }
}

MailInfoBase.designer.cs

namespace MailControl
{
    partial class MailInfoBase
    {
        /**//// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /**//// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        Windows Form Designer generated code#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.panel1 = new System.Windows.Forms.Panel();
            this.btnGoPrev = new System.Windows.Forms.Button();
            this.btnGoNext = new System.Windows.Forms.Button();
            this.btnOver = new System.Windows.Forms.Button();
            this.btnCancel = new System.Windows.Forms.Button();
            this.panel1.SuspendLayout();
            this.SuspendLayout();
            // 
            // panel1
            // 
            this.panel1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)
                        | System.Windows.Forms.AnchorStyles.Right)));
            this.panel1.Controls.Add(this.btnCancel);
            this.panel1.Controls.Add(this.btnOver);
            this.panel1.Controls.Add(this.btnGoPrev);
            this.panel1.Controls.Add(this.btnGoNext);
            this.panel1.Location = new System.Drawing.Point(13, 13);
            this.panel1.Name = "panel1";
            this.panel1.Size = new System.Drawing.Size(476, 306);
            this.panel1.TabIndex = 0;
            // 
            // btnGoPrev
            // 
            this.btnGoPrev.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
            this.btnGoPrev.Location = new System.Drawing.Point(109, 280);
            this.btnGoPrev.Name = "btnGoPrev";
            this.btnGoPrev.Size = new System.Drawing.Size(75, 23);
            this.btnGoPrev.TabIndex = 1;
            this.btnGoPrev.Text = "上一步";
            this.btnGoPrev.UseVisualStyleBackColor = true;
            this.btnGoPrev.Click += new System.EventHandler(this.btnGoPrev_Click);
            // 
            // btnGoNext
            // 
            this.btnGoNext.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
            this.btnGoNext.Location = new System.Drawing.Point(202, 280);
            this.btnGoNext.Name = "btnGoNext";
            this.btnGoNext.Size = new System.Drawing.Size(75, 23);
            this.btnGoNext.TabIndex = 2;
            this.btnGoNext.Text = "下一步";
            this.btnGoNext.UseVisualStyleBackColor = true;
            this.btnGoNext.Click += new System.EventHandler(this.btnGoNext_Click);
            // 
            // btnOver
            // 
            this.btnOver.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
            this.btnOver.Location = new System.Drawing.Point(295, 280);
            this.btnOver.Name = "btnOver";
            this.btnOver.Size = new System.Drawing.Size(75, 23);
            this.btnOver.TabIndex = 3;
            this.btnOver.Text = "完成";
            this.btnOver.UseVisualStyleBackColor = true;
            this.btnOver.Click += new System.EventHandler(this.btnOver_Click);
            // 
            // btnCancel
            // 
            this.btnCancel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
            this.btnCancel.Location = new System.Drawing.Point(388, 280);
            this.btnCancel.Name = "btnCancel";
            this.btnCancel.Size = new System.Drawing.Size(75, 23);
            this.btnCancel.TabIndex = 4;
            this.btnCancel.Text = "取消";
            this.btnCancel.UseVisualStyleBackColor = true;
            this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click);
            // 
            // MailInfoBase
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(501, 331);
            this.Controls.Add(this.panel1);
            this.Name = "MailInfoBase";
            this.Text = "MailInfoBase";
            this.panel1.ResumeLayout(false);
            this.ResumeLayout(false);

        }

        #endregion

        public System.Windows.Forms.Panel panel1;
        public System.Windows.Forms.Button btnGoPrev;
        public System.Windows.Forms.Button btnGoNext;
        public System.Windows.Forms.Button btnOver;
        public System.Windows.Forms.Button btnCancel;
    }
}

MailController.cs

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

namespace MailControl
{
    public class MailInfoController
    {
        public MailInfoController(ref ArrayList al )
        {
            WizardForms = al;
            foreach (MailInfoBase frm in WizardForms)
            {
                frm.controller = this;
                frm.DisableButton();
            }
        }
        private ArrayList WizardForms = new ArrayList();
        public MailInfo info = new MailInfo();
        private int curIndex = 0;

        public bool IsFirstForm
        {
            get 
            {
                return curIndex == 0;
            }
        }
        public bool IsLastForm
        {
            get
            {
                return curIndex == this.WizardForms.Count - 1;
            }
        }
        public void GoNext()
        {
            if(curIndex+1<WizardForms.Count)
            {
                ((MailInfoBase)WizardForms[curIndex]).Visible = false;
                curIndex++;
            }
            else
            {
                return;
            }
            ((MailInfoBase)WizardForms[curIndex]).Show();
            ((MailInfoBase)WizardForms[curIndex]).DisableButton();
        }
        public void GoPrev()
        {
            if(curIndex-1>=0)
            {
                ((MailInfoBase)WizardForms[curIndex]).Visible = false;
                curIndex--;
            }
            else
            {
                return;
            }
            ((MailInfoBase)WizardForms[curIndex]).Show();
            ((MailInfoBase)WizardForms[curIndex]).DisableButton();
        }
        public void BeginWizard()
        {
            ((MailInfoBase)WizardForms[0]).Show();
            ((MailInfoBase)WizardForms[curIndex]).DisableButton();
        }
        public void FinishWizard()
        {
            curIndex = 0;
            Dispose();
        }
        private void Dispose()
        {
            foreach(MailInfoBase frm in WizardForms)
            {
                frm.Close();
            }
        }
    }    
}

program.cs

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

namespace MailControl
{
    static class Program
    {
        /**//// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new MailInfoBase());
        }
    }
}