Introduction
Mar 29, 2019 The test application contains a single Windows Form class; this form contains a text box used to display the name of the file selected for upload, a browse button used to launch an open file dialog box which is used to navigate to and select a file for upload, and an upload button which is used to pass the file to web service so that the selected file may be stored on the server. How to layer in mixxx. The 'Stream Sample' available on MSDN contains all the code you need to upload a file as a stream to a self-hosted WCF service and then save it to disk on the server by reading the stream in 4KB chunks. The download contains about 150 solutions with more than 4800 files, so there is a lot of stuff in it. Wcf File Upload Limit 8,3/10 9505 votes Feb 20, 2012 Recently, we need to allow users to upload large files to a web service. Fortunately, WCF does support this scenario (see MSDN: Large Data and Streaming).
Kendo UI has a nice widget ‘File Upload', by which we can upload a file(or multiple files) from client machine to server side. In this tip, we will try to upload files using WCF service.
The task is very much simple with MVC application and controller, but whenever we use WCF service and Kendo File Upload, we have to follow the below steps for uploading file(files) to server.
Step – 1
The first step is to make our wcf service to accept streamed data, and the setting maximum allowable size.
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Step – 2
Then in the service contract, we have to add an operation which accepts a stream for its only parameter.
| [ServiceContract] |
| public interface IKendoFileUploadService |
| { |
| [OperationContract] |
| void SaveFile(Stream file); |
| } |
Step – 3
In this step, we have to define the operation contract and accepts all the files as stream coming from the client via kendo file upload.
| public class KendoFileUploadService : IKendoFileUploadService |
| { |
| [WebInvoke(Method = 'POST', BodyStyle = WebMessageBodyStyle.Bare)] |
| public void SaveFile(Stream stream) |
| { |
| var fileNameWithContents = GetFileNameWithContents(stream, Encoding.UTF8); |
| File.WriteAllBytes(fileNameWithContents.Key, fileNameWithContents.Value); |
| } |
| private byte[] GetByteFromStream(Stream stream) |
| { |
| using (var memoryStream = new MemoryStream()) |
| { |
| stream.CopyTo(memoryStream); |
| return memoryStream.ToArray(); |
| } |
| } |
| private KeyValuePair GetFileNameWithContents(Stream stream, Encoding encoding) |
| { |
| var fileNameWithContents = new KeyValuePair(); |
| var fileBytes = GetByteFromStream(stream); |
| // Copy to a string for header parsing |
| string content = encoding.GetString(fileBytes); |
| // The first line should contain the delimiter |
| int delimiterEndIndex = content.IndexOf('rn'); |
| if (delimiterEndIndex <= -1) |
| { |
| } |
| else |
| { |
| string delimiter = content.Substring(0, content.IndexOf('rn')); |
| // Look for Content-Type |
| Regex re = new Regex(@'(?<=Content-Type:)(.*?)(?=rnrn)'); |
| Match contentTypeMatch = re.Match(content); |
| // Look for filename |
| re = new Regex(@'(?<=filename=')(.*?)(?=')'); |
| Match filenameMatch = re.Match(content); |
| // Did we find the required values? |
| if (contentTypeMatch.Success && filenameMatch.Success) |
| { |
| var fileName = filenameMatch.Value.Trim(); |
| // Get the start & end indexes of the file contents |
| int startIndex = contentTypeMatch.Index + contentTypeMatch.Length + 'rnrn'.Length; |
| byte[] delimiterBytes = encoding.GetBytes('rn' + delimiter); |
| int endIndex = IndexOf(fileBytes, delimiterBytes, startIndex); |
| int contentLength = endIndex - startIndex; |
| // Extract the file contents from the byte array |
| byte[] fileData = new byte[contentLength]; |
| Buffer.BlockCopy(fileBytes, startIndex, fileData, 0, contentLength); |
| var contents = fileData; |
| fileNameWithContents = new KeyValuePair(fileName, fileData); |
| } |
| } |
| return fileNameWithContents; |
| } |
| private int IndexOf(byte[] searchWithin, byte[] serachFor, int startIndex) |
| { |
| int index = 0; |
| int startPos = Array.IndexOf(searchWithin, serachFor[0], startIndex); |
| if (startPos != -1) |
| { |
| while ((startPos + index) < searchWithin.Length) |
| { |
| if (searchWithin[startPos + index] serachFor[index]) |
| { |
| index++; |
| if (index serachFor.Length) |
| { |
| return startPos; |
| } |
| } |
| else |
| { |
| startPos = Array.IndexOf(searchWithin, serachFor[0], startPos + index); |
| if (startPos -1) |
| { |
| return -1; |
| } |
| index = 0; |
| } |
| } |
| } |
| return -1; |
| } |
| } |
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Step – 4
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After we are done with all code set up, then now simply we have to call the SaveFile method of contract via kendo file upload from our jquery.
Suppose I have following control in my aspx page and in the js file, we have to write the following code and we are done. It will upload multiple files asynchronously to server.
| $('#files').kendoUpload({ |
| multiple: true, |
| async: { |
| saveUrl: '/FileUploadWcfService/KendoFileUploadService.svc/SaveFile', |
| removeUrl: 'remove', |
| autoUpload: false |
| } |
| }); |
Conclusion
