In this post, I will show you how to stream (upload and download) data through the WCF service.
- Create a new website
- Right-click on the website and add a new WCF service named
FileStream.svc - Open the
IFileStream.csand add the following code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.IO;
[ServiceContract]
public interface IFileStream
{
[OperationContract]
string Upload(Stream inputStream);
[OperationContract]
Stream Download(string fileId);
[OperationContract]
string[] GetAvailableFiles();
}
Open FileStream.cs file and add the following code inside it
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.IO;
using System.Web;
// NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service" in code, svc and config file together.
public class FileStream : IFileStream
{
private const string FILEPATH = @"C:\temp\download";
private string GetDirectoryPath()
{
return FILEPATH;
}
public string Upload(System.IO.Stream inputStream)
{
string fileID = string.Format(@"{0}\{1}.txt", GetDirectoryPath(), Guid.NewGuid().ToString());
StreamReader reader = new StreamReader(inputStream);
string contents = reader.ReadToEnd();
File.WriteAllText(fileID, contents);
return fileID;
}
public System.IO.Stream Download(string fileId)
{
MemoryStream stream = new MemoryStream();
byte[] buffer = File.ReadAllBytes(fileId);
stream.Write(buffer, 0, buffer.Length);
stream.Position = 0;
return stream;
}
public string[] GetAvailableFiles()
{
return new DirectoryInfo(GetDirectoryPath()).GetFiles().Select(x => x.FullName).ToArray();
}
}
Now, It’s time to configure the service. There is two way to configure the service. First through the code, and second through the config file. I will follow a later approach.Open web. config and go to the section and add the following code
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0"/>
</system.web>
<system.serviceModel>
<services>
<service behaviorConfiguration="streamServiceBehaviour" name="FileStream">
<endpoint address="" binding="basicHttpBinding" contract="IFileStream" bindingConfiguration="streamBindingConfig"/>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="streamServiceBehaviour">
<serviceDebug includeExceptionDetailInFaults="true"/>
<serviceMetadata httpGetEnabled="true"/>
</behavior>
</serviceBehaviors>
</behaviors>
<bindings>
<basicHttpBinding>
<binding name="streamBindingConfig" transferMode="Streamed">
</binding>
</basicHttpBinding>
</bindings>
</system.serviceModel>
</configuration>
In the above configuration, I have used basicHttpBinding and transferMode*is Streamed.
Let’s consume the service. Right-click on the project and add a new page and add the following code to it
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ServiceExample.aspx.cs" Inherits="ServiceExample" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="btnUpload" runat="server" OnClick="btnUpload_Click" Text="Upload" />
</div>
<asp:Button ID="btnDownload" runat="server" onclick="btnDownload_Click"
Text="Download" />
<asp:TextBox ID="TextBox1" runat="server" Height="235px" Width="377px"></asp:TextBox>
</form>
</body>
</html>
using System.Collections.Generic;
using System;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
public partial class ServiceExample : System.Web.UI.Page
{
StreamService.FileStreamClient client = new StreamService.FileStreamClient();
string fileId = string.Empty;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnUpload_Click(object sender, EventArgs e)
{
fileId=client.Upload(new MemoryStream(FileUpload1.FileBytes));
Session["fileID"] = fileId;
}
protected void btnDownload_Click(object sender, EventArgs e)
{
Stream stream = client.Download((String)Session["fileID"]);
StreamReader reader = new StreamReader(stream);
TextBox1.Text = reader.ReadToEnd();
}
}