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This article mainly explains "how to write silverlight upload code with webclient large files", the content of the explanation is simple and clear, easy to learn and understand, now please follow the editor's ideas slowly in depth, together to study and learn "how to write silverlight upload code with webclient large files"!

Client:

The copy code is as follows:

/ / /

/ / write data to the stream

/ / /

/ / /

/ / /

Public async static Task Write (string url, Stream clientStream)

{

If (clientStream.Length > 25,1024,1024)

Url + = "& twee1"; / / indicates uploading large files

Try

{

Up (url, clientStream)

Return true

}

Catch {}

Return false

}

Public async static Task Up (string url, Stream sourceStream)

{

Var wc = new WebClient ()

Byte [] buffer = new byte [25,1024,1024]

Int bufLen = sourceStream.Read (buffer, 0, buffer.Length)

If (bufLen

{

If (sourceStream.CanRead)

Up (url, sourceStream)

Else

SourceStream.Close ()

}

Var serverStream = await wc.OpenWriteTaskAsync (url, "POST")

ServerStream.Write (buffer, 0, bufLen)

ServerStream.Close ()

}

Server:

The copy code is as follows:

Private void Save ()

{

String data = Context.Request.QueryString ["data"] .Base64StringDecode ("ABC")

If (data.IsNullOrEmpty ())

Return

Var m = JsonConvert.DeserializeObject (data)

If (m = = null)

Return

Var isSplitBlock = Context.Request.QueryString ["t"] = = "1"; / / whether to upload parts

# region saves the file

/ / initialize the directory

String dirPath = Path.Combine (ConfigHelper.UploadPath, m.Dir); / / File save path

If (! Directory.Exists (dirPath))

Directory.CreateDirectory (dirPath)

/ / File address

String filePath = Path.Combine (dirPath, m.FileName)

If (! isSplitBlock)

{

If (File.Exists (filePath))

File.Delete (filePath)

}

Int bufLen = 0

Byte [] buffer = new byte [4096]

Using (FileStream fs = new FileStream (filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite))

{

Fs.Seek (0, SeekOrigin.End)

/ / write to the original file

Stream sr = Context.Request.InputStream

While ((bufLen = sr.Read (buffer, 0, buffer.Length)) > 0)

Fs.Write (buffer, 0, bufLen)

Sr.Close ()

Sr.Dispose ()

/ / Thumbnail

Try

{

If (! m.NeedThumbnail)

Return

DirPath = Path.Combine (dirPath, "Small")

If (! Directory.Exists (dirPath))

Directory.CreateDirectory (dirPath)

FilePath = Path.Combine (dirPath, m.FileName)

If (File.Exists (filePath))

File.Delete (filePath)

Using (var pic = GetThumbnail (fs, 300,300))

{

Pic.Save (filePath)

}

}

Catch {}

}

# endregion

# region Delete the original file

/ / Delete the original file

If (m.OldFilePath.IsNullOrEmpty ())

{

Return

}

Try

{

FilePath = Path.Combine (ConfigHelper.UploadPath, m.OldFilePath)

If (File.Exists (filePath))

File.Delete (filePath)

If (m.NeedThumbnail)

{

FilePath = Path.Combine (ConfigHelper.UploadPath, m.OldThumbnailImagePath)

If (File.Exists (filePath))

File.Delete (filePath)

}

}

Catch (Exception ex)

{

}

# endregion

}

Note for multipart upload: read the data in blocks after each stream is saved, otherwise multiple blocks will come together, and the data in front of the block stream will be overwritten by the later block stream data.

Pay attention to the process while paying attention to the results

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