C# ajax 大文件上传
C# ajax 大文件上传组件可以支持超大文件，最大支持10G，已经加入断点续传功能；本人测试效果良好，上传效率还可以。
全部代码暂不提供，只提供代码参考。
demo: http://dwz.cn/topwang
请看核心代码：
<br><br>public partial class MainPage
: UserControl { private UploadDataContext
model; private FileUploadContext
fiUpService; private int UploadBlockSize
= 400 * 1024; private bool IsUploadPaused
= false; private string clientIP
= ""; private string allowExt
= ""; private long allowSize
= 0; private string taskID=""; Dictionary<string,bool>
taskList = new Dictionary<string,bool>(); public MainPage() { InitializeComponent(); } public MainPage(string cip,string ext,string fSize) :this() { clientIP
= cip; allowExt
= FormatExt(ext); allowSize
= long.Parse(fSize); } private string FormatExt(string fileExt)
{ string[]
arr=fileExt.Split('|'); string extList=""; for(int i=0;i<arr.Length;i++){ extList+="*."+arr[i]; if(i!=arr.Length-1){ extList
+= ";"; } } return fileExt.Replace("|",",")+"|"+extList; } [ScriptableMember] public string OnBeforeUnload() { if (model.TotalUploaded
!= 0 && model.TotalUploaded < model.TotalFileSize) { return "您正在上传文件，且尚未完成，您确定离开？"; } else { return string.Empty; } } private void UserControl_Loaded(object sender,
RoutedEventArgs e) { model
= new UploadDataContext(); this.DataContext
= model; fiUpService
= new FileUploadContext(); const string scriptableObjectName
= "Bridge"; HtmlPage.RegisterScriptableObject(scriptableObjectName,this); string pluginName
= HtmlPage.Plugin.Id; string script
= string.Format( @"window.onbeforeunload
= function () {{ var
slApp = document.getElementById('{0}'); var
result = slApp.Content.{1}.OnBeforeUnload(); if(result.length
> 0) return
result; }}",
pluginName, scriptableObjectName); HtmlPage.Window.Eval(script); } private void btnSelectFile_Click(object sender,
RoutedEventArgs e) { var dialog
= new OpenFileDialog(); dialog.Multiselect
= true; dialog.Filter
= allowExt; if (dialog.ShowDialog()
== true) { string notAllowedFiles
= ""; foreach (var filein dialog.Files) { string md5
= MD5.GetMd5String(clientIP + file.Name + file.Length + DateTime.Now.ToString("yyyy-MM-dd")); if (model.UploadFileList.FirstOrDefault(x
=> x.FileId == md5) == null) { if (!IsAllowFileSize(file.Length)) { notAllowedFiles
+= ";" +
file.Name; continue; } UploadFileInfo
ufile = new UploadFileInfo(); ufile.FileId
= md5; ufile.FileName
= file.Name; ufile.FileSize
= file.Length; ufile.Uploaded
= 0; ufile.FileInfo
= file; model.UploadFileList.Add(ufile); } } if (notAllowedFiles.Length
> 0) { MessageBox.Show("单个文件大小不能超过：" +
formatSize(allowSize)); } btnStartUpload.IsEnabled
= model.UploadFileList.Count > 0; } } private bool IsAllowFileSize(long fSize) { if (this.allowSize
> fSize || this.allowSize==
fSize) { return true; } else { return false; } } private string formatSize(long value)
{ if (value>0) { long fileSize
= (long)value; string result; if (fileSize
>= 1024 * 1024 * 1024) { result
= Math.Round((double)fileSize
/ (1024 * 1024 * 1024), 2) + "
GB"; } else if (fileSize
>= 1024 * 1024) { result
= Math.Round((double)fileSize
/ (1024 * 1024), 2) + "
MB"; } else if (fileSize
>= 1024) { result
= Math.Round((double)fileSize
/ 1024, 2) + "
KB"; } else { result
= fileSize + "
B"; } return result; } else { return "0
B"; } } private void btnStartUpload_Click(object sender,
RoutedEventArgs e) { btnSelectFile.IsEnabled
= false; btnDelete.IsEnabled
= false; btnStartUpload.IsEnabled
= false; btnCancelUpload.IsEnabled
= true; btnPauseUpload.IsEnabled
= true; taskID
= MD5.GetMd5String(DateTime.Now.ToString()); taskList.Add(taskID,false); bool isResume
= true; if (isResume
== true) { foreach (var itemin model.UploadFileList) { fiUpService.GetFileUploadInfo(new UploadFileInfoContract { FileId
= item.FileId, FileName
= item.FileName, FileSize
= item.FileSize, Uploaded
= item.Uploaded },
OnGetFileInfoComplete, null); } } else { foreach (var itemin model.UploadFileList) { Uploading(item); } } } private void OnGetFileInfoComplete(InvokeOperation<UploadFileInfoContract>
invokeOp) { UploadFileInfoContract
contract = invokeOp.Value; if (contract
!= null) { UploadFileInfo
ufi = model.UploadFileList.SingleOrDefault(x => x.FileId == contract.FileId); if (ufi
!= null) { ufi.Uploaded
= contract.Uploaded; if(ufi.FileSize>ufi.Uploaded){ Uploading(ufi); }else if (ufi.FileSize
== ufi.Uploaded){ ufi.ServerUrl
= contract.ServerUrl; Uploading(ufi); } } } } private void Uploading(UploadFileInfo
ufi) { if(taskID!=""){ if (taskList.ContainsKey(taskID)) { if (taskList[taskID]==true) { return; } } } lock (this) { if (IsUploadPaused) { return; } if (ufi.Uploaded
< ufi.FileSize) { FileStream
fs = ufi.FileInfo.OpenRead(); fs.Seek(ufi.Uploaded,
SeekOrigin.Begin); int size
= UploadBlockSize; if (size
> ufi.FileSize - ufi.Uploaded) { size
= (int)(ufi.FileSize
- ufi.Uploaded); } byte[]
bytes = new byte[size]; try { fs.Read(bytes,
0, size); fiUpService.Uploading(new UploadFileInfoContract { FileId
= ufi.FileId, FileName
= ufi.FileName, FileSize
= ufi.FileSize, Uploaded
= ufi.Uploaded },
bytes, UploadingComplete, null); } finally { fs.Close(); fs.Dispose(); fs
= null; } } else { if (model.TotalUploaded
>= model.TotalFileSize) { taskList[taskID]
= true; UIHelper.SetTimeout(1000,
() => { string files_list
= "["; int i=0; foreach (var itemin model.UploadFileList) { i++; files_list
+= "{\"file_name\":\""+item.FileName+"\",\"file_size\":\""+item.FileSize+"\",\"file_url\":\""+item.ServerUrl+"\"}"; if(i!=model.UploadFileList.Count){ files_list
+= ","; } } files_list
+= "]"; model.UploadFileList.Clear(); btnSelectFile.IsEnabled
= true; btnDelete.IsEnabled
= true; btnStartUpload.IsEnabled
= false; btnCancelUpload.IsEnabled
= false; IsUploadPaused
= false; btnPauseUpload.Content
= "暂停"; btnPauseUpload.IsEnabled
= false; HtmlPage.Window.Invoke("FileUploadCompleteJs",
files_list); }); } } } } private void UploadingComplete(InvokeOperation<UploadFileInfoContract>
invokeOp) { UploadFileInfoContract
contract = invokeOp.Value; if (contract
!= null) { UploadFileInfo
ufi = model.UploadFileList.SingleOrDefault(x => x.FileId == contract.FileId); if (ufi
!= null) { ufi.Uploaded
= contract.Uploaded; ufi.ServerUrl
= contract.ServerUrl; Uploading(ufi); } } } private void btnCancelUpload_Click(object sender,
RoutedEventArgs e) { lock (this) { IsUploadPaused
= true; btnPauseUpload.IsEnabled
= false; ConfirmWin
win = new ConfirmWin(); win.Message
= "取消上传将会清空当前已上传部分文件，\r\n您确定要取消上传？"; win.Closed
+= new EventHandler(CancelConfirmWin_Closed); win.Show(); } } void CancelConfirmWin_Closed(object sender,
EventArgs e) { ConfirmWin
win = sender as ConfirmWin; if (win.DialogResult
== true) { List<UploadFileInfoContract>
list = new List<UploadFileInfoContract>(); foreach (var itemin model.UploadFileList) { UploadFileInfoContract
c = new UploadFileInfoContract(); c.FileId
= item.FileId; c.FileName
= item.FileName; c.FileSize
= item.FileSize; c.Uploaded
= item.Uploaded; list.Add(c); } fiUpService.CancelUpload(list,
CancelUploadComplete, null); taskList.Remove(taskID); taskID
= ""; } else { IsUploadPaused
= false; btnPauseUpload.Content
= "暂停"; btnPauseUpload.IsEnabled
= true; } } private void CancelUploadComplete(InvokeOperation<List<UploadFileInfoContract>>
invokeOp) { List<UploadFileInfoContract>
list = invokeOp.Value; if (list
!= null) { foreach (var itemin list) { UploadFileInfo
ufi = model.UploadFileList.SingleOrDefault(x => x.FileId == item.FileId); if (ufi
!= null) { ufi.Uploaded
= item.Uploaded; } } } IsUploadPaused
= false; btnSelectFile.IsEnabled
= true; btnDelete.IsEnabled
= true; btnStartUpload.IsEnabled
= true; btnPauseUpload.IsEnabled
= false; btnPauseUpload.Content
= "暂停"; btnCancelUpload.IsEnabled
= false; } private void btnDelete_Click(object sender,
RoutedEventArgs e) { if (grdFileList.SelectedItems
!= null) { List<UploadFileInfo>
selectedItems = new List<UploadFileInfo>(); foreach (var itemin grdFileList.SelectedItems) { UploadFileInfo
fi = item as UploadFileInfo; if (fi
!= null) { selectedItems.Add(fi); } } int i
= 0; foreach (var itemin selectedItems) { i++; model.UploadFileList.Remove(item); } if (i
== 0) { MessageBox.Show("您没有选中任何文件，请先选中文件。"); } if (model.UploadFileList.Count
== 0) { btnStartUpload.IsEnabled
= false; } } } private void btnPauseUpload_Click(object sender,
RoutedEventArgs e) { lock (this) { IsUploadPaused
= !IsUploadPaused; if (IsUploadPaused) { btnPauseUpload.Content
= "继续"; } else { btnPauseUpload.Content
= "暂停"; if (taskList[taskID]
== false) { foreach (var itemin model.UploadFileList) { fiUpService.GetFileUploadInfo(new UploadFileInfoContract { FileId
= item.FileId, FileName
= item.FileName, FileSize
= item.FileSize, Uploaded
= item.Uploaded },
OnGetFileInfoComplete, null); } } } } } } |
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