Smart Client Software Factory 映射业务实体到界面元素

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本文介绍了一种将业务模型实体类Attachment映射到UI控件ListView的方法，通过AttachmentMapper实现了数据与视图间的转换。

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下面做了一个例子，如下图，这个例子的主要目的是，把业务模型实体类映射到具体的UI控件上

上面在Module(自己创建的业务工程)右键添加一个实体类模型 Attachment

[csharp]view plaincopyprint? 
    
 using System;  
 using System.Collections.Generic;  
 using System.Linq;  
 using System.Text;  
   
 namespace SmartClient.Module  
 {  
     public class Attachment  
     {  
         public event EventHandler StatusChanged;  
   
         public enum AttachmentStatus  
         {  
             NotAvailable,  
             Downloading,  
             AvailableNotModified,  
             AvailableModified,  
             ToBeUploaded,  
             Uploading,  
             Uploaded  
         }  
   
         private string _displayName;  
   
         public string DisplayName  
         {  
             get { return _displayName; }  
             set { _displayName = value; }  
         }  
   
         private string _fileName;  
   
         public string FileName  
         {  
             get { return _fileName; }  
             set { _fileName = value; }  
         }  
   
         private string _documentUrl;  
   
         public string DocumentUrl  
         {  
             get { return _documentUrl; }  
             set { _documentUrl = value; }  
         }  
   
         private AttachmentStatus _status;  
   
         public AttachmentStatus Status  
         {  
             get { return _status; }  
             set  
             {  
                 _status = value;  
             }  
         }  
   
         private DateTime _localCreationTime;  
   
         public DateTime LocalCreationTime  
         {  
             get { return _localCreationTime; }  
             set { _localCreationTime = value; }  
         }  
     }  
 }  

再添加一个映射器类,AttachmentMapper，它的作用是把这个业务实体绑定到ListView中

[csharp]view plaincopyprint? 
    
 using System;  
 using System.Collections.Generic;  
 using System.Linq;  
 using System.Text;  
 using System.Windows.Forms;  
   
 namespace SmartClient.Module  
 {  
     public static class AttachmentMapper  
     {  
         public static ListViewItem ToListViewItem(Attachment attachment)  
         {  
             return new AttachmentListViewItem(attachment);  
         }  
   
         public static Attachment FromListViewItem(ListViewItem listViewItem)  
         {  
             AttachmentListViewItem attachmentListViewItem =  
                             listViewItem as AttachmentListViewItem;  
   
             return attachmentListViewItem.Attachment;  
         }  
   
         private class AttachmentListViewItem : ListViewItem  
         {  
             private Attachment _attachment;  
   
             public AttachmentListViewItem(Attachment attachment)  
             {  
                 Name = attachment.DisplayName;  
                 Text = attachment.DisplayName;  
                 SubItems.Add(AttachmentStatusToDisplayText(attachment));  
                 _attachment = attachment;  
             }  
   
             private static string AttachmentStatusToDisplayText(Attachment attachment)  
             {  
                 switch (attachment.Status)  
                 {  
                     case Attachment.AttachmentStatus.AvailableModified:  
                         return "Modified";  
   
                     case Attachment.AttachmentStatus.AvailableNotModified:  
                         return "Available";  
   
                     case Attachment.AttachmentStatus.Downloading:  
                         return "Downloading...";  
   
                     case Attachment.AttachmentStatus.NotAvailable:  
                         return "To be downloaded";  
   
                     case Attachment.AttachmentStatus.ToBeUploaded:  
                         return "To be uploaded";  
   
                     case Attachment.AttachmentStatus.Uploaded:  
                         return "Uploaded";  
   
                     case Attachment.AttachmentStatus.Uploading:  
                         return "Uploading";  
                 }  
   
                 return attachment.Status.ToString();  
             }  
   
             public Attachment Attachment  
             {  
                 get { return _attachment; }  
             }  
         }  
     }  
 }  

然后我们在View中，拖放一个ListView上去，并命名为_attachmentsListView，并修改其.cs代码

[csharp]view plaincopyprint? 
    
 using System;  
 using System.Windows.Forms;  
 using Microsoft.Practices.CompositeUI.SmartParts;  
 using Microsoft.Practices.ObjectBuilder;  
 using SmartClient.Infrastructure.Interface;  
   
 namespace SmartClient.Module  
 {  
     public partial class View : UserControl, IView  
     {  
         public View()  
         {  
             InitializeComponent();  
         }  
   
         protected override void OnLoad(EventArgs e)  
         {  
             _presenter.OnViewReady();  
             base.OnLoad(e);  
             //加入如下代码，在窗体加载时执行对ListView的绑定  
             var attachment = new Attachment();  
             attachment.DisplayName = "这是一个测试";  
             AddAttachmentToList(attachment);  
         }  
   
         private void AddAttachmentToList(Attachment attachment)  
         {  
             ListViewItem item = AttachmentMapper.ToListViewItem(attachment);  
             _attachmentsListView.Items.Add(item);  
         }  
     }  
 }  