博客园_WPF随笔

WPF UI与逻辑分离的一种方法

2010-04-16T13:35:00Z

WPF UI与逻辑分离的一种方法

WPF的UI的Style一般是用Blend来设计的，这部分通常由设计人员来完成，但由于开发人员也要写很多逻辑功能在里面，可能会给设计人员使用Blend编辑修改UI Style代理不便。每次程序的修改，设计人员都可能需要花很多时间来对程序进行编译，对于不懂程序的设计人员，是很痛苦的。

在这里提出一种解决方案，供大家参考。主要思路是把整个设计分成三个部分：

1，Control Library用于定义UI的Style和布局。

2，Logical Library用于定义程序的逻辑功能。

3，Application用于显示Control Library里面设计的UI并调用Logical Library的逻辑功能

前两个部分的代码不举例了，下面写一下最后一部分的代码。
本文链接

Wizard in C#

2010-04-12T11:23:00Z

Wizard in C#

As we know there is no wizard class in .net framework. I just write two classes for control wizard in C#.

The code list here.

1, BaseWizardForm: The wizard each page’s base form

The form will auto generate the wizard step button, you can set the button type in the derived form class.

BaseWizardFormusing 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 WindowsFormsApplication1
{
    public enum WizardButtons
    {
        None,
        OK,
        Cancel,
        OKCancel,
        NextCancel,
        BackNextCancel,
        BackFinishCancel,
    }

    public partial class BaseWizardForm : Form
    {
        /// <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);
        }

        #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.backCommonButton = new System.Windows.Forms.Button();
            this.nextCommonButton = new System.Windows.Forms.Button();
            this.cancelCommonButton = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // backCommonButton
            // 
            this.backCommonButton.BackColor = System.Drawing.Color.Transparent;
            this.backCommonButton.DialogResult = System.Windows.Forms.DialogResult.Retry;
            this.backCommonButton.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
            this.backCommonButton.Location = new System.Drawing.Point(194, 338);
            this.backCommonButton.Name = "backCommonButton";
            this.backCommonButton.Size = new System.Drawing.Size(80, 26);
            this.backCommonButton.TabIndex = 3;
            this.backCommonButton.Text = "Back";
            this.backCommonButton.UseVisualStyleBackColor = true;
            this.backCommonButton.Click += new System.EventHandler(this.backCommonButton_Click);
            // 
            // nextCommonButton
            // 
            this.nextCommonButton.BackColor = System.Drawing.Color.Transparent;
            this.nextCommonButton.DialogResult = System.Windows.Forms.DialogResult.OK;
            this.nextCommonButton.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
            this.nextCommonButton.Location = new System.Drawing.Point(284, 338);
            this.nextCommonButton.Name = "nextCommonButton";
            this.nextCommonButton.Size = new System.Drawing.Size(80, 26);
            this.nextCommonButton.TabIndex = 4;
            this.nextCommonButton.Text = "Next";
            this.nextCommonButton.UseVisualStyleBackColor = true;
            this.nextCommonButton.Click += new System.EventHandler(this.nextCommonButton_Click);
            // 
            // cancelCommonButton
            // 
            this.cancelCommonButton.BackColor = System.Drawing.Color.Transparent;
            this.cancelCommonButton.DialogResult = System.Windows.Forms.DialogResult.Cancel;
            this.cancelCommonButton.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
            this.cancelCommonButton.Location = new System.Drawing.Point(374, 338);
            this.cancelCommonButton.Name = "cancelCommonButton";
            this.cancelCommonButton.Size = new System.Drawing.Size(80, 26);
            this.cancelCommonButton.TabIndex = 5;
            this.cancelCommonButton.Text = "Cancel";
            this.cancelCommonButton.UseVisualStyleBackColor = true;
            this.cancelCommonButton.Click += new System.EventHandler(this.cancelCommonButton_Click);
            // 
            // BaseWizardForm
            // 
            this.AcceptButton = this.nextCommonButton;
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
            this.CancelButton = this.cancelCommonButton;
            this.ClientSize = new System.Drawing.Size(514, 427);
            this.Controls.Add(this.cancelCommonButton);
            this.Controls.Add(this.nextCommonButton);
            this.Controls.Add(this.backCommonButton);
            this.MaximizeBox = false;
            this.MinimizeBox = false;
            this.Name = "BaseWizardForm";
            this.ShowIcon = false;
            this.ShowInTaskbar = false;
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "BaseWizardForm";
            this.ResumeLayout(false);

        }

        #endregion

        protected Button backCommonButton;
        protected Button nextCommonButton;
        protected Button cancelCommonButton;


        ////////////////////////////////////////////////////////////////////////////////////////
        protected WizardButtons formButtons = WizardButtons.OKCancel;

        public WizardButtons WizardButton
        {
            get { return this.formButtons; }
            set
            {
                this.formButtons = value;
                this.ChangeFormButtons(value);
            }
        }

        public BaseWizardForm()
        {
            InitializeComponent();
        }

        protected override void OnCreateControl()
        {
            base.OnCreateControl();

            this.AutoScaleMode = AutoScaleMode.None;
        }

        private void ChangeFormButtons(WizardButtons buttons)
        {
            this.RePositionButtons();

            switch (buttons)
            {
                case WizardButtons.None:
                    {
                        this.backCommonButton.Visible = false;
                        this.nextCommonButton.Visible = false;
                        this.cancelCommonButton.Visible = false;
                    }
                    break;
                case WizardButtons.OK:
                    {
                        this.nextCommonButton.Text = "OK";
                        this.nextCommonButton.Location = this.cancelCommonButton.Location;

                        this.backCommonButton.Visible = false;
                        this.cancelCommonButton.Visible = false;
                        this.nextCommonButton.Visible = true;
                    }
                    break;
                case WizardButtons.Cancel:
                    {
                        this.cancelCommonButton.Text = "Cancel";

                        this.backCommonButton.Visible = false;
                        this.nextCommonButton.Visible = false;
                        this.cancelCommonButton.Visible = true;
                    }
                    break;
                case WizardButtons.OKCancel:
                    {
                        this.nextCommonButton.Text = "OK";
                        this.cancelCommonButton.Text = "Cancel";

                        this.backCommonButton.Visible = false;
                        this.cancelCommonButton.Visible = true;
                        this.nextCommonButton.Visible = true;
                    }
                    break;
                case WizardButtons.NextCancel:
                    {
                        this.nextCommonButton.Text = "Next";
                        this.cancelCommonButton.Text = "Cancel";

                        this.backCommonButton.Visible = false;
                        this.cancelCommonButton.Visible = true;
                        this.nextCommonButton.Visible = true;
                    }
                    break;
                case WizardButtons.BackNextCancel:
                    {
                        this.backCommonButton.Text = "Back";
                        this.nextCommonButton.Text = "Next";
                        this.cancelCommonButton.Text = "Cancel";

                        this.backCommonButton.Visible = true;
                        this.cancelCommonButton.Visible = true;
                        this.nextCommonButton.Visible = true;
                    }
                    break;
                case WizardButtons.BackFinishCancel:
                    {
                        this.backCommonButton.Text = "Back";
                        this.nextCommonButton.Text = "Finish";
                        this.cancelCommonButton.Text = "Cancel";

                        this.backCommonButton.Visible = true;
                        this.cancelCommonButton.Visible = true;
                        this.nextCommonButton.Visible = true;
                    }
                    break;
            }
        }

        private void RePositionButtons()
        {
            this.cancelCommonButton.Location = new Point(this.ClientRectangle.Width - this.cancelCommonButton.Width - 10, this.ClientRectangle.Height - this.cancelCommonButton.Height - 10);
            this.nextCommonButton.Location = new Point(this.cancelCommonButton.Left - this.nextCommonButton.Width - 15, this.ClientRectangle.Height - this.nextCommonButton.Height - 10);
            this.backCommonButton.Location = new Point(this.nextCommonButton.Left - this.backCommonButton.Width - 15, this.ClientRectangle.Height - this.backCommonButton.Height - 10);

            this.cancelCommonButton.Visible = true;
            this.backCommonButton.Visible = true;
            this.nextCommonButton.Visible = true;
        }

        protected override void OnSizeChanged(EventArgs e)
        {
            base.OnSizeChanged(e);

            if (this.cancelCommonButton == null)
                return;

            this.ChangeFormButtons(this.formButtons);
        }

        private void backCommonButton_Click(object sender, EventArgs e)
        {
            if (!this.OnBack())
                this.DialogResult = DialogResult.None;
        }

        private void nextCommonButton_Click(object sender, EventArgs e)
        {
            if (this.WizardButton == WizardButtons.BackFinishCancel)
            {
                if (!this.OnFinish())
                    this.DialogResult = DialogResult.None;
            }
            else
            {
                if (!this.OnNext())
                    this.DialogResult = DialogResult.None;
            }
        }

        private void cancelCommonButton_Click(object sender, EventArgs e)
        {
            if (!this.OnCancel())
                this.DialogResult = DialogResult.None;
        }

        protected virtual bool OnBack()
        {
            return true;
        }

        protected virtual bool OnNext()
        {
            return true;
        }

        protected virtual bool OnFinish()
        {
            return true;
        }

        protected virtual bool OnCancel()
        {
            return true;
        }
    }
}

2, WizardController used to contol which wizard form to display

You can create new wizard control class from this class and control your wizard step yourself by override NextStep and PreStep.

WizardControlusing System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Reflection;

namespace WindowsFormsApplication1
{
    public class WizardController : Component
    {
        private List<BaseWizardForm> formList = new List<BaseWizardForm>();
        protected int currentStep = 0;
        private Timer delayShowDialogTimer;

        protected IWin32Window parentWindow = null;

        #region Constructor and Destructor

        public WizardController()
            : base()
        {

        }

        #endregion

        #region IDisposable Members

        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                foreach (BaseWizardForm form in formList)
                {
                    if (!form.IsDisposed)
                        form.Dispose();
                }
            }

            base.Dispose(disposing);
        }

        #endregion

        #region Methods

        public void AddForm(BaseWizardForm form)
        {
            this.formList.Add(form);
        }

        public void AddForm(Type formType)
        {
            Assembly assembly = Assembly.GetCallingAssembly();
            if (assembly == null)
                return;

            BaseWizardForm form = assembly.CreateInstance(formType.FullName) as BaseWizardForm;
            this.AddForm(form);
        }

        public void RemoveForm(BaseWizardForm form)
        {
            this.formList.Remove(form);
        }

        public DialogResult ShowDialog(IWin32Window parent)
        {
            this.parentWindow = parent;

            return this.ShowDialog();
        }

        protected virtual DialogResult ShowDialog()
        {
            DialogResult ret = this.formList[this.currentStep].ShowDialog(this.parentWindow);
            if (ret == DialogResult.OK)
            {
                if (this.NextStep())
                    return this.ShowDialog();
            }
            else if (ret == DialogResult.Retry)
            {
                if (this.PreStep())
                    return this.ShowDialog();
            }
            else
            {
                return DialogResult.Cancel;
            }

            return ret;
        }

        protected virtual bool NextStep()
        {
            if (this.currentStep == this.formList.Count - 1)
                return false;

            this.currentStep++;

            return true;
        }

        protected virtual bool PreStep()
        {
            if (this.currentStep == 0)
                return false;

            this.currentStep--;

            return true;
        }

        #endregion

    }
}

3 How to use.

A, Create new forms derived from BaseWizardForm and set the forms' WizardButton Property.

B, Create a new class derived from WizardController and add the forms to the controller.

public TestWizardController()
        {
            this.AddForm(typeof(Form1));
            this.AddForm(typeof(Form2));
        }

C, Show the wizard

TestWizardController test = new TestWizardController()

test.ShowDialog(null);

本文链接

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