XAF之弹出式进度条

一直想加一个进度条到XAF的工程中去，最后发现两条途径：

1.自定义模板，加入进度条；

2.动态弹出一个进度条；

自定义模板就不说了，可以参照官方文档的例子做，下面说说弹出进度条，如图：

        这个例子是我模仿FeatureCenter部分代码做的，下面两个文件（LongOperationController.cs和ProgressForm.cs）的代码无须更改，可直接使用。

LongOperationController.cs的源码：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using DevExpress.ExpressApp;using System.ComponentModel;namespace FunSolution.Module{    public interface IProgressControl : IDisposable    {        void ShowProgress(BackgroundWorker worker);    }    public abstract class LongOperationController : ViewController    {        private IProgressControl progressControl;        private BackgroundWorker _worker;        public BackgroundWorker Worker        {            private set { _worker = value; }            get { return _worker; }        }        private void Work_Completed(object sender,RunWorkerCompletedEventArgs e)        {            OnOperationCompleted();            progressControl.Dispose();            progressControl = null;            ((BackgroundWorker)sender).RunWorkerCompleted -= new RunWorkerCompletedEventHandler(Work_Completed);            ((BackgroundWorker)sender).Dispose();        }        protected abstract void DoWorkCore(object sender, DoWorkEventArgs e);        protected abstract IProgressControl CreateProgressControl();        protected virtual void OnOperationCompleted()        {            View.ObjectSpace.Refresh();            if (OperationCompleted != null)            {                OperationCompleted(this, EventArgs.Empty);            }        }        protected void StartLongOperation()        {            Worker = new BackgroundWorker();            Worker.WorkerReportsProgress = true;            Worker.WorkerSupportsCancellation = true;            Worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(Work_Completed);            Worker.DoWork += new DoWorkEventHandler(DoWorkCore);            progressControl = CreateProgressControl();            progressControl.ShowProgress(Worker);            Worker.RunWorkerAsync();        }        protected void RaiseProcessChanged(int percentage)        {            Worker.ReportProgress(percentage);        }        protected bool CancellationPending        {            get { return Worker.CancellationPending; }        }        //子类可订阅也可不订阅        public event EventHandler OperationCompleted;    }}

下面是ProgressForm.cs的源码，负责显示部分：

using System;using System.Collections.Generic;using System.Text;using DevExpress.XtraEditors;using System.Windows.Forms;using DevExpress.ExpressApp;using System.ComponentModel;using System.Drawing;using FunSolution.Module;namespace FunSolution.Module.Win{    public class ProgressForm : IProgressControl {        public const string FormName = "ProgressForm";        private XtraForm form;        private ProgressBarControl progressBar = new ProgressBarControl();        private SimpleButton cancelButton = new SimpleButton();        private Label label = new Label();        private BackgroundWorker worker;        private int minimumProgressValue;        private int maximumProgressValue;        private string progressFormCaption;        private delegate void UpdateProgressFormDelegate(int value, string message);        private void CreateProgressForm() {            form = new XtraForm();            form.Name = FormName;            form.Width = 350;            form.Height = 125;            form.StartPosition = FormStartPosition.CenterScreen;            form.FormBorderStyle = FormBorderStyle.FixedDialog;            form.MinimizeBox = false;            form.MaximizeBox = false;            form.ControlBox = false;            form.ShowInTaskbar = false;            label.Parent = form;            label.Location = new Point(10, 10);            label.Size = new Size(form.ClientSize.Width - 20, 13);            progressBar.Parent = form;            progressBar.Location = new Point(10, 30);            progressBar.Name = "progressBar";            progressBar.Size = new Size(form.ClientSize.Width - 20, 15);            progressBar.Properties.Minimum = minimumProgressValue;            progressBar.Properties.Maximum = maximumProgressValue;            progressBar.Properties.Step = 1;            cancelButton.Parent = form;            cancelButton.DialogResult = DialogResult.Cancel;            cancelButton.Size = new Size(75, 23);            cancelButton.Location = new Point((form.Width - cancelButton.Width) / 2, 55);            cancelButton.Text = "&Cancel";            cancelButton.Click += new EventHandler(cancelButton_Click);            cancelButton.LostFocus += new EventHandler(DoOnFormLostFocus);            form.CancelButton = cancelButton;            form.Text = progressFormCaption;        }        private void DoOnFormLostFocus(object sender, EventArgs e) {            form.Focus();        }        private void LongOperation_Completed(object sender, RunWorkerCompletedEventArgs  e) {            if(form != null) {                form.Invoke(new MethodInvoker(form.Close));            }        }        private void UpdateProgressForm(int value, string message) {            progressBar.EditValue = value;            progressBar.Update();            label.Text = message;        }        private void LongOperation_ProgressChanged(object sender, ProgressChangedEventArgs e)        {            int value = e.ProgressPercentage;            if(form != null) {                form.Invoke(new UpdateProgressFormDelegate(UpdateProgressForm), new object[] { value, null });            }        }        private void cancelButton_Click(object sender, EventArgs e) {            if (worker.WorkerSupportsCancellation == true)            {                worker.CancelAsync();            }        }                protected ProgressForm(int minimum, int maximum)            : this("", minimum, maximum) {        }        public ProgressForm(string caption, int minimum, int maximum) {            this.progressFormCaption = caption;            this.minimumProgressValue = minimum;            this.maximumProgressValue = maximum;            CreateProgressForm();        }        public ProgressForm()            : this(0, 100) {        }        public void Dispose() {            label = null;            cancelButton.LostFocus -= new EventHandler(DoOnFormLostFocus);            this.worker.ProgressChanged -= new ProgressChangedEventHandler(LongOperation_ProgressChanged);            this.worker.RunWorkerCompleted -= new RunWorkerCompletedEventHandler(LongOperation_Completed);                        if(form != null) {                form.Invoke(new MethodInvoker(form.Dispose));                form = null;            }        }        public void ShowProgress(BackgroundWorker worker) {            form.Show();            this.worker = worker;            this.worker.ProgressChanged += new ProgressChangedEventHandler(LongOperation_ProgressChanged);            this.worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(LongOperation_Completed);        }    }}

接下来就是自己新加的ViewController，添加一个ViewController使它继承LongOperationController，并重写以下方法：

protected override void DoWorkCore(object sender, DoWorkEventArgs e)

protected  override IProgressControl CreateProgressControl()

DoWorkCore是要进行的耗时的具体操作，CreateProgressControl创建进度条窗体。

另外，添加一个Action调用继承而来的StartLongOperation。

public partial class ViewController1 : LongOperationController    {        public ViewController1()        {            InitializeComponent();            RegisterActions(components);        }        protected override void DoWorkCore(object sender, DoWorkEventArgs e)        {            int i=0;            while(i++<100){                if (CancellationPending == true)                    break;                Thread.Sleep(50);                this.RaiseProcessChanged(i);            }        }        protected  override IProgressControl CreateProgressControl()        {            return new ProgressForm("操作进行中", 0, 100);        }        private void simpleAction1_Execute(object sender, SimpleActionExecuteEventArgs e)        {            this.StartLongOperation();        }    }