In this post,I will show you how to stream (upload and download) data through wcfservice.
- Create a new website
- Right click on the website and add new wcf service named FileStream.svc
- Open the IFileStream.cs and add 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 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 are two way to configure the service.First through the code ,and second through the config file.I will followlatter approach.Open web.config and go to
section and add 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 new page and add following code into 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;
using System.Collections.Generic;
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();
}
}
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