在Silverlight上实现文件上传的例子在网上的还不多,特别是多文件上传和大文件上传的例子就更少了。当然那些商品软件公司的产品除外。

    目前的CodePlex上就有这样一个项目,其链接:http://www.codeplex.com/SLFileUpload/ ,他的个人主站链接:http://www.michielpost.nl/   
   
    我在本地下载运行其代码后,发现“果然”很好用,而且代码写的也很规范。当然其也是免费的,但作者并不拒绝各种名义上的“捐助(Donate)”。

    下面就是其“汉化”后的运行截图,首先是多文件上传:
   
    一个Silverlight多文件(大文件)上传的开源项目_9387         
 

    然后是大文件上传:
   
    一个Silverlight多文件(大文件)上传的开源项目_9388         


    根据作者的README文件,其支持下面几个初始化参数:   
 

    MaxFileSizeKB:  File size in KBs.
    MaxUploads:  Maximum number of simultaneous uploads
    FileFilter: File filter, for example ony jpeg use: FileFilter=Jpeg (*.jpg) |*.jpg
    CustomParam: Your custom parameter, anything here will be available in the WCF webservice
    DefaultColor: The default color for the control, for example: LightBlue

   
    当然,里面的服务端采用WCF方法。为了考虑在.net1框架上也可以使用,我在保留原有代码结构的基础上,将WCF
用ASMX格式拷贝了一份,经过编译,完成可以运行:)

    同时为了便于大家阅读源码,我还加入了中文说明(源码中注释很少,而且是EN文)。下面就是其主要的几个类的
定义和说明:

    FileCollection 上传文件集合类,用于UI统一访问和操作:
  1. /// <summary>
  2. /// 文件集合管理类
  3. /// 注:ObservableCollection是个泛型集合类,往其中添加或去除条目时(或者其中的条目实现了INotifyPropertyChanged的话,在属性变动时),
  4. /// 它会发出变化通知事件(先执行集合类中的同名属性)。这在做数据绑定时会非常方便,因为UI控件可以使用这些通知来知道自动刷新它们的值,
  5. /// 而不用开发人员编写代码来显式地这么做。
  6. /// </summary>
  7. public class FileCollection : ObservableCollection<UserFile>
  8. {
  9.     /// <summary>
  10.     /// 已上传的累计(多文件)字节数
  11.     /// </summary>
  12.     private double _bytesUploaded = 0;
  13.     /// <summary>
  14.     /// 已上传字符数占全部字节数的百分比
  15.     /// </summary>
  16.     private int _percentage = 0;
  17.     /// <summary>
  18.     /// 当前正在上传的文件序号
  19.     /// </summary>
  20.     private int _currentUpload = 0;
  21.     /// <summary>
  22.     /// 上传初始化参数,详情如下:
  23.     /// MaxFileSizeKB:  File size in KBs.
  24.     /// MaxUploads:  Maximum number of simultaneous uploads
  25.     /// FileFilter: File filter, for example ony jpeg use: FileFilter=Jpeg (*.jpg) |*.jpg
  26.     /// CustomParam: Your custom parameter, anything here will be available in the WCF webservice
  27.     /// DefaultColor: The default color for the control, for example: LightBlue
  28.     /// </summary>
  29.     private string _customParams;
  30.     /// <summary>
  31.     /// 最大上传字节数
  32.     /// </summary>
  33.     private int _maxUpload;
  34.    
  35.     /// <summary>
  36.     /// 已上传的累计(多文件)字节数,该字段的修改事件通知会发给page.xmal中的TotalKB
  37.     /// </summary>
  38.     public double BytesUploaded
  39.     {
  40.         get { return _bytesUploaded; }
  41.         set
  42.         {
  43.             _bytesUploaded = value;
  44.             this.OnPropertyChanged(new PropertyChangedEventArgs("BytesUploaded"));
  45.         }
  46.     }

  47.     /// <summary>
  48.     /// 已上传字符数占全部字节数的百分比,该字段的修改事件通知会发给page.xmal中的TotalProgress
  49.     /// </summary>
  50.     public int Percentage
  51.     {
  52.         get { return _percentage; }
  53.         set
  54.         {
  55.             _percentage = value;
  56.             this.OnPropertyChanged(new PropertyChangedEventArgs("Percentage"));
  57.         }
  58.     }

  59.     /// <summary>
  60.     /// 构造方法
  61.     /// </summary>
  62.     /// <param name="customParams"></param>
  63.     /// <param name="maxUploads"></param>
  64.     public FileCollection(string customParams, int maxUploads)
  65.     {
  66.         _customParams = customParams;
  67.         _maxUpload = maxUploads;

  68.         this.CollectionChanged += new System.Collections.Specialized.NotifyCollectionChangedEventHandler(FileCollection_CollectionChanged);
  69.     }

  70.  
  71.     /// <summary>
  72.     /// 依次加入所选的上传文件信息
  73.     /// </summary>
  74.     /// <param name="item"></param>
  75.     public new void Add(UserFile item)
  76.     {
  77.         item.PropertyChanged += new PropertyChangedEventHandler(item_PropertyChanged);           
  78.         base.Add(item);
  79.     }

  80.     /// <summary>
  81.     /// 单个上传文件属性改变时
  82.     /// </summary>
  83.     /// <param name="sender"></param>
  84.     /// <param name="e"></param>
  85.     void item_PropertyChanged(object sender, PropertyChangedEventArgs e)
  86.     {
  87.         //当属性变化为“从上传列表中移除”
  88.         if (e.PropertyName == "IsDeleted")
  89.         {
  90.             UserFile file = (UserFile)sender;

  91.             if (file.IsDeleted)
  92.             {
  93.                 if (file.State == Constants.FileStates.Uploading)
  94.                 {
  95.                     _currentUpload--;
  96.                     UploadFiles();
  97.                 }

  98.                 this.Remove(file);

  99.                 file = null;
  100.             }
  101.         }
  102.         //当属性变化为“开始上传”
  103.         else if (e.PropertyName == "State")
  104.         {
  105.             UserFile file = (UserFile)sender;
  106.             //此时file.State状态为ploading
  107.             if (file.State == Constants.FileStates.Finished || file.State == Constants.FileStates.Error)
  108.             {
  109.                 _currentUpload--;
  110.                 UploadFiles();
  111.             }
  112.         }
  113.         //当属性变化为“上传进行中”
  114.         else if (e.PropertyName == "BytesUploaded")
  115.         {
  116.             //重新计算上传数据
  117.             RecountTotal();
  118.         }
  119.     }


  120.     /// <summary>
  121.     /// 上传文件
  122.     /// </summary>
  123.     public void UploadFiles()
  124.     {
  125.         lock (this)
  126.         {
  127.             foreach (UserFile file in this)
  128.             {  //当上传文件未被移除(IsDeleted)或是暂停时
  129.                 if (!file.IsDeleted && file.State == Constants.FileStates.Pending && _currentUpload < _maxUpload)
  130.                 {
  131.                     file.Upload(_customParams);
  132.                     _currentUpload++;
  133.                 }
  134.             }
  135.         }

  136.     }

  137.     /// <summary>
  138.     /// 重新计算数据
  139.     /// </summary>
  140.     private void RecountTotal()
  141.     {
  142.         //Recount total
  143.         double totalSize = 0;
  144.         double totalSizeDone = 0;

  145.         foreach (UserFile file in this)
  146.         {
  147.             totalSize += file.FileSize;
  148.             totalSizeDone += file.BytesUploaded;
  149.         }

  150.         double percentage = 0;

  151.         if (totalSize > 0)
  152.             percentage = 100 * totalSizeDone / totalSize;

  153.         BytesUploaded = totalSizeDone;

  154.         Percentage = (int)percentage;
  155.     }

  156.     /// <summary>
  157.     /// 当添加或取消上传文件时触发
  158.     /// </summary>
  159.     /// <param name="sender"></param>
  160.     /// <param name="e"></param>
  161.     void FileCollection_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
  162.     {
  163.         //当集合信息变化时(添加或删除项)时,则重新计算数据
  164.         RecountTotal();
  165.     }
  166. }
复制代码
上传文件信息类:
  1. /// <summary>
  2. /// 上传文件信息类
  3. /// </summary>
  4. public class UserFile : INotifyPropertyChanged
  5. {
  6.     /// <summary>
  7.     /// 上传文件名称
  8.     /// </summary>
  9.     private string _fileName;
  10.     /// <summary>
  11.     /// 是否取消上传该文件
  12.     /// </summary>
  13.     private bool _isDeleted = false;     
  14.     /// <summary>
  15.     /// 上传文件的流信息
  16.     /// </summary>
  17.     private Stream _fileStream;
  18.     /// <summary>
  19.     /// 当前上传文件状态
  20.     /// </summary>
  21.     private Constants.FileStates _state = Constants.FileStates.Pending;
  22.     /// <summary>
  23.     /// 当前已上传的字节数(这里与FileCollection中的同名属性意义不同,FileCollection中的是已上传的所有文件的字节总数)
  24.     /// </summary>
  25.     private double _bytesUploaded = 0;
  26.     /// <summary>
  27.     /// 当前文件大小
  28.     /// </summary>
  29.     private double _fileSize = 0;
  30.     /// <summary>
  31.     /// 已上传文件的百分比
  32.     /// </summary>
  33.     private int _percentage = 0;
  34.     /// <summary>
  35.     /// 上传文件操作类
  36.     /// </summary>
  37.     private FileUploader _fileUploader;

  38.     /// <summary>
  39.     /// 上传文件名称
  40.     /// </summary>
  41.     public string FileName
  42.     {
  43.         get { return _fileName; }
  44.         set
  45.         {
  46.             _fileName = value;
  47.             NotifyPropertyChanged("FileName");
  48.         }
  49.     }

  50.     /// <summary>
  51.     /// 当前上传文件的状态,注意这时使用了NotifyPropertyChanged来通知FileRowControl控件中的FileRowControl_PropertyChanged事件
  52.     /// </summary>
  53.     public Constants.FileStates State
  54.     {
  55.         get { return _state; }
  56.         set
  57.         {
  58.             _state = value;

  59.             NotifyPropertyChanged("State");
  60.         }
  61.     }

  62.     /// <summary>
  63.     /// 当前上传文件是否已被移除,注意这时使用了NotifyPropertyChanged来通知FileCollection类中的item_PropertyChanged事件
  64.     /// </summary>
  65.     public bool IsDeleted
  66.     {
  67.         get { return _isDeleted; }
  68.         set
  69.         {
  70.             _isDeleted = value;

  71.             if (_isDeleted)
  72.                 CancelUpload();

  73.             NotifyPropertyChanged("IsDeleted");
  74.         }
  75.     }

  76.     /// <summary>
  77.     /// 上传文件的流信息
  78.     /// </summary>
  79.     public Stream FileStream
  80.     {
  81.         get { return _fileStream; }
  82.         set
  83.         {
  84.             _fileStream = value;

  85.             if (_fileStream != null)
  86.                 _fileSize = _fileStream.Length;               
  87.            
  88.         }
  89.     }

  90.     /// <summary>
  91.     /// 当前文件大小
  92.     /// </summary>
  93.     public double FileSize
  94.     {
  95.         get {
  96.             return _fileSize;             
  97.         }
  98.     }

  99.     /// <summary>
  100.     /// 当前已上传的字节数(这里与FileCollection中的同名属性意义不同,FileCollection中的是已上传的所有文件的字节总数)
  101.     /// </summary>
  102.     public double BytesUploaded
  103.     {
  104.         get { return _bytesUploaded; }
  105.         set
  106.         {
  107.             _bytesUploaded = value;

  108.             NotifyPropertyChanged("BytesUploaded");

  109.             Percentage = (int)((value * 100) / _fileStream.Length);

  110.         }
  111.     }

  112.     /// <summary>
  113.     /// 已上传文件的百分比(这里与FileCollection中的同名属性意义不同,FileCollection中的是已上传字符数占全部字节数的百分比,该字段的修改事件通知会发给page.xmal中的TotalProgress)
  114.     /// </summary>
  115.     public int Percentage
  116.     {
  117.         get { return _percentage; }
  118.         set
  119.         {
  120.             _percentage = value;
  121.             NotifyPropertyChanged("Percentage");
  122.         }
  123.     }

  124.  
  125.     /// <summary>
  126.     /// 上传当前文件
  127.     /// </summary>
  128.     /// <param name="initParams"></param>
  129.     public void Upload(string initParams)
  130.     {
  131.         this.State = Constants.FileStates.Uploading;

  132.         _fileUploader = new FileUploader(this);           
  133.         _fileUploader.UploadAdvanced(initParams);
  134.         _fileUploader.UploadFinished += new EventHandler(fileUploader_UploadFinished);           
  135.     }

  136.     /// <summary>
  137.     /// 取消上传,注:该文件仅在本类中的IsDeleted属性中使用
  138.     /// </summary>
  139.     public void CancelUpload()
  140.     {
  141.         if (_fileUploader != null && this.State == Constants.FileStates.Uploading)
  142.         {
  143.             _fileUploader.CancelUpload();
  144.         }
  145.     }

  146.     /// <summary>
  147.     /// 当前文件上传完成时
  148.     /// </summary>
  149.     /// <param name="sender"></param>
  150.     /// <param name="e"></param>
  151.     void fileUploader_UploadFinished(object sender, EventArgs e)
  152.     {
  153.         _fileUploader = null;

  154.         this.State = Constants.FileStates.Finished;
  155.     }


  156.     #region INotifyPropertyChanged Members

  157.     private void NotifyPropertyChanged(string prop)
  158.     {
  159.         if (PropertyChanged != null)
  160.         {
  161.             PropertyChanged(this, new PropertyChangedEventArgs(prop));
  162.         }
  163.     }

  164.     public event PropertyChangedEventHandler PropertyChanged;

  165.     #endregion
  166. }
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上传文件操作类(实现文件上传功能代码):
  1. /// <summary>
  2. /// 文件上传类
  3. /// </summary>
  4. public class FileUploader
  5. {
  6.     private UserFile _file;
  7.     private long _dataLength;
  8.     private long _dataSent;
  9.     private SilverlightUploadServiceSoapClient _client;
  10.     private string _initParams;
  11.     private bool _firstChunk = true;
  12.     private bool _lastChunk = false;
  13.    

  14.     public FileUploader(UserFile file)
  15.     {
  16.         _file = file;

  17.         _dataLength = _file.FileStream.Length;
  18.         _dataSent = 0;

  19.         //创建WCF端,此处被注释
  20.         //BasicHttpBinding binding = new BasicHttpBinding();
  21.         //EndpointAddress address = new EndpointAddress(new CustomUri("SilverlightUploadService.svc"));
  22.         //_client = new UploadService.UploadServiceClient(binding, address);
  23.         //_client = new UploadService.UploadServiceClient();
  24.         //_client.InnerChannel.Closed += new EventHandler(InnerChannel_Closed);
  25.        
  26.         //创建webservice客户端
  27.         _client = new SilverlightUploadServiceSoapClient();
  28.         //事件绑定
  29.         _client.StoreFileAdvancedCompleted += new EventHandler<System.ComponentModel.AsyncCompletedEventArgs>(_client_StoreFileAdvancedCompleted);
  30.         _client.CancelUploadCompleted += new EventHandler<System.ComponentModel.AsyncCompletedEventArgs>(_client_CancelUploadCompleted);
  31.         _client.ChannelFactory.Closed += new EventHandler(ChannelFactory_Closed);
  32.     }

  33.     #region
  34.     /// <summary>
  35.     /// 关闭ChannelFactory事件
  36.     /// </summary>
  37.     /// <param name="sender"></param>
  38.     /// <param name="e"></param>
  39.     void ChannelFactory_Closed(object sender, EventArgs e)
  40.     {
  41.         ChannelIsClosed();
  42.     }

  43.     void _client_CancelUploadCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
  44.     {
  45.         //当取消上传完成后关闭Channel
  46.         _client.ChannelFactory.Close();
  47.     }

  48.     /// <summary>
  49.     /// Channel被关闭
  50.     /// </summary>
  51.     private void ChannelIsClosed()
  52.     {
  53.         if (!_file.IsDeleted)
  54.         {
  55.             if (UploadFinished != null)
  56.                 UploadFinished(this, null);
  57.         }
  58.     }

  59.     /// <summary>
  60.     /// 取消上传
  61.     /// </summary>
  62.     public void CancelUpload()
  63.     {
  64.         _client.CancelUploadAsync(_file.FileName);
  65.     }
  66.     #endregion

  67.     /// <summary>
  68.     /// 上传完成事件处理对象声明
  69.     /// </summary>
  70.     public event EventHandler UploadFinished;

  71.     public void UploadAdvanced(string initParams)
  72.     {
  73.         _initParams = initParams;

  74.         UploadAdvanced();
  75.     }

  76.     /// <summary>
  77.     /// 上传文件
  78.     /// </summary>
  79.     private void UploadAdvanced()
  80.     {
  81.        
  82.         byte[] buffer = new byte[4 * 4096];
  83.         int bytesRead = _file.FileStream.Read(buffer, 0, buffer.Length);

  84.         //文件是否上传完毕?
  85.         if (bytesRead != 0)
  86.         {
  87.             _dataSent += bytesRead;

  88.             if (_dataSent == _dataLength)
  89.                 _lastChunk = true;//是否是最后一块数据,这样WCF会在服务端根据该信息来决定是否对临时文件重命名

  90.             //上传当前数据块
  91.             _client.StoreFileAdvancedAsync(_file.FileName, buffer, bytesRead, _initParams, _firstChunk, _lastChunk);


  92.             //在第一条消息之后一直为false
  93.             _firstChunk = false;

  94.             //通知上传进度修改
  95.             OnProgressChanged();
  96.         }
  97.         else
  98.         {
  99.             //当上传完毕后
  100.             _file.FileStream.Dispose();
  101.             _file.FileStream.Close();

  102.             _client.ChannelFactory.Close();         
  103.         }

  104.     }

  105.     /// <summary>
  106.     /// 修改进度属性
  107.     /// </summary>
  108.     private void OnProgressChanged()
  109.     {
  110.         _file.BytesUploaded = _dataSent;//注:此处会先调用FileCollection中的同名属性,然后才是_file.BytesUploaded属性绑定
  111.     }

  112.     void _client_StoreFileAdvancedCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
  113.     {
  114.         //检查WEB服务是否存在错误
  115.         if (e.Error != null)
  116.         {
  117.             //当错误时放弃上传
  118.             _file.State = Constants.FileStates.Error;
  119.         }
  120.         else
  121.         {
  122.             //如果文件未取消上传的话,则继续上传
  123.             if (!_file.IsDeleted)
  124.                 UploadAdvanced();
  125.         }
  126.     }

  127. }
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服务端WCF代码如下(ASMX文件代码与其基本相同):
  1. [AspNetCompatibilityRequirements  (RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
  2. public class UploadService : IUploadService
  3. {
  4.     private string _tempExtension = "_temp";

  5.     #region IUploadService Members

  6.    
  7.     /// <summary>
  8.     /// 取消上传
  9.     /// </summary>
  10.     /// <param name="fileName"></param>
  11.     public void CancelUpload(string fileName)
  12.     {
  13.         string uploadFolder = GetUploadFolder();
  14.         string tempFileName = fileName + _tempExtension;

  15.         if (File.Exists(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + tempFileName))
  16.             File.Delete(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + tempFileName);
  17.     }

  18.     public void StoreFileAdvanced(string fileName, byte[] data, int dataLength, string parameters, bool firstChunk, bool lastChunk)
  19.     {
  20.         string uploadFolder = GetUploadFolder();
  21.         string tempFileName = fileName + _tempExtension;

  22.         //当上传文件的第一批数据时,先清空以往的相同文件名的文件(同名文件可能为上传失败造成)
  23.         if (firstChunk)
  24.         {
  25.             //删除临时文件
  26.             if (File.Exists(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + tempFileName))
  27.                 File.Delete(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + tempFileName);

  28.             //删除目标文件
  29.             if (File.Exists(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + fileName))
  30.                 File.Delete(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + fileName);

  31.         }


  32.         FileStream fs = File.Open(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + tempFileName, FileMode.Append);
  33.         fs.Write(data, 0, dataLength);
  34.         fs.Close();

  35.         if (lastChunk)
  36.         {
  37.             //将临时文件重命名为原来的文件名称
  38.             File.Move(HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + tempFileName, HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + fileName);

  39.             //Finish stuff.
  40.             FinishedFileUpload(fileName, parameters);
  41.         }

  42.     }

  43.     /// <summary>
  44.     /// 删除上传文件
  45.     /// </summary>
  46.     /// <param name="fileName"></param>
  47.     protected void DeleteUploadedFile(string fileName)
  48.     {
  49.         string uploadFolder = GetUploadFolder();

  50.         if (File.Exists(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + fileName))
  51.             File.Delete(@HostingEnvironment.ApplicationPhysicalPath + "/" + uploadFolder + "/" + fileName);
  52.     }

  53.     protected virtual void FinishedFileUpload(string fileName, string parameters)
  54.     {
  55.     }

  56.     /// <summary>
  57.     /// 获取上传路径
  58.     /// </summary>
  59.     /// <returns></returns>
  60.     protected virtual string GetUploadFolder()
  61.     {
  62.         return "Upload";
  63.     }   
  64.     #endregion
  65. }
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当然在该DEMO中,其支持两种初始化方式,一种是:
  1. <asp:Silverlight ID="Xaml1" runat="server" Source="~/ClientBin/mpost.SilverlightMultiFileUpload.xap" MinimumVersion="2.0.30523"  Width="415" Height="280"  InitParameters="MaxFileSizeKB=1000,MaxUploads=2,FileFilter=,CustomParam=1,DefaultColor=LightBlue"  />
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另一种是在ServiceReferences.ClientConfig中进行文件配置:
  1. <appSettings>
  2.       <add key="MaxFileSizeKB" value="50" />
  3.       <add key="FileFilter" value="Photo's (*.jpg)|*.jpg" />
  4.       <add key="FileFilter" value="" />
  5.       <add key="MaxUploads" value="2" />
  6. </appSettings>
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而加载顺序要是自上而下,代码段如下(摘自Page.xaml.cs):
  1. /// <summary>
  2. /// 加载配置参数 then from .Config file
  3. /// </summary>
  4. /// <param name="initParams"></param>
  5. private void LoadConfiguration(IDictionary<string, string> initParams)
  6. {
  7.     string tryTest = string.Empty;

  8.     //加载定制配置信息串
  9.     if (initParams.ContainsKey("CustomParam") && !string.IsNullOrEmpty(initParams["CustomParam"]))
  10.         _customParams = initParams["CustomParam"];

  11.     if (initParams.ContainsKey("MaxUploads") && !string.IsNullOrEmpty(initParams["MaxUploads"]))
  12.     {
  13.         int.TryParse(initParams["MaxUploads"], out _maxUpload);           
  14.     }

  15.     if (initParams.ContainsKey("MaxFileSizeKB") && !string.IsNullOrEmpty(initParams["MaxFileSizeKB"]))
  16.     {
  17.         if (int.TryParse(initParams["MaxFileSizeKB"], out _maxFileSize))
  18.             _maxFileSize = _maxFileSize * 1024;
  19.     }

  20.     if (initParams.ContainsKey("FileFilter") && !string.IsNullOrEmpty(initParams["FileFilter"]))
  21.         _fileFilter = initParams["FileFilter"];



  22.     //从配置文件中获取相关信息
  23.     if (!string.IsNullOrEmpty(ConfigurationManager.AppSettings["MaxFileSizeKB"]))
  24.     {
  25.         if (int.TryParse(ConfigurationManager.AppSettings["MaxFileSizeKB"], out _maxFileSize))
  26.             _maxFileSize = _maxFileSize * 1024;
  27.     }

  28.    
  29.     if(!string.IsNullOrEmpty(ConfigurationManager.AppSettings["MaxUploads"]))
  30.         int.TryParse(ConfigurationManager.AppSettings["MaxUploads"], out _maxUpload);

  31.     if(!string.IsNullOrEmpty( ConfigurationManager.AppSettings["FileFilter"]))
  32.         _fileFilter = ConfigurationManager.AppSettings["FileFilter"];

  33. }
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好了,今天的内容就先到这里了,感兴趣的朋友可以在回复中进行讨论或给他(作者)留言,contact@MichielPost.nl
   
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看一下,嘿嘿~
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这个很经典的
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不错,看看先
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占位学习~~~
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深情顶帖,楼主加油!
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深情顶帖,楼主加油!
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深情顶帖,楼主加油!
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