How to consume LEADTOOLS WCF as REST services using WebRequest and WebResponse (C#, VB.Net)

Method 1:

1. Start Visual Studio .NET.

2. Choose File->New->Project... from the menu.

3. In the New Project dialog box, choose either "Visual C# Projects" or "Visual Basic Projects" in the Projects Type List, and choose "Windows Application " in the Templates List.

4. Type the project name as "ConvertImage_Service" in the Project Name field, and then choose OK. If desired, type a new location for

your project or select a directory using the Browse button, and then choose OK.

5. From the Visual Studio Toolbox, create a standard button and name it to 'Method 1'.

6. Switch to Form1 code view (right-click Form1 in the solution explorer then select View Code) and add the following lines at the beginning

of the file:

[Visual Basic]

				
Imports System.Net
Imports System.Text

[C#]

					
using System.Net;
using System.Text;

7. Add the following code to the Button's Click function:

[Visual Basic]

						
Dim baseAddress As String = "http://localhost:8080/LeadtoolsServicesHost/RasterService.svc"
Dim request As HttpWebRequest = DirectCast(HttpWebRequest.Create(baseAddress & "/Convert"),_
 HttpWebRequest)
request.Method = "POST" request.ContentType = "text/xml; charset=utf-8"
Dim reqBodyStr As String = "<ConvertRequestxmlns=""http://Leadtools.Services.Raster.ServiceContracts/2009/01"""
reqBodyStr = reqBodyStr & "><ConvertOptions xmlns:a=""http://Leadtools.Services.Raster.DataContracts/2009/01"""
reqBodyStr = reqBodyStr & " xmlns:i=""http://www.w3.org/2001/XMLSchema-instance""><a:BackColor i:nil=""true""/>"
reqBodyStr = reqBodyStr & "<a:BitsPerPixel>16</a:BitsPerPixel><a:Destination i:type=""b:FileBinaryData"" xmlns:b="""
reqBodyStr = reqBodyStr & "http://Leadtools.Services.DataContracts/2009/01""><b:FileName>c:\out.cmp</b:FileName></a:Destination>"
reqBodyStr = reqBodyStr & "<a:FirstPage>1</a:FirstPage><a:Format>CMP</a:Format><a:Height>0</a:Height><a:HorizontalAlignMode>Near"
reqBodyStr = reqBodyStr & "</a:HorizontalAlignMode><a:LastPage>-1</a:LastPage><a:QualityFactor>2</a:QualityFactor><a:ResizeFlags>"
reqBodyStr = reqBodyStr & "None</a:ResizeFlags><a:ResizeMode>Normal</a:ResizeMode><a:Source i:type=""b:FileBinaryData"" xmlns:b="""
reqBodyStr = reqBodyStr & "http://Leadtools.Services.DataContracts/2009/01""><b:FileName> image1.jpeg </b:FileName></a:Source>"
reqBodyStr = reqBodyStr & "<a:VerticalAlignMode>Near</a:VerticalAlignMode><a:Width>0</a:Width></ConvertOptions></ConvertRequest>"
Dim reqBodyBytes As Byte() = Encoding.UTF8.GetBytes(reqBodyStr)
request.GetRequestStream().Write(reqBodyBytes, 0, reqBodyBytes.Length)
request.GetRequestStream().Close()
Dim response As HttpWebResponse
Try
   response = DirectCast(request.GetResponse(), HttpWebResponse)
   Catch web As WebException
   response = DirectCast(web.Response, HttpWebResponse)
End Try

[C#]

							
string baseAddress = "http://localhost:8080/LeadtoolsServicesHost/RasterService.svc";
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(baseAddress + "/Convert");
request.Method = "POST";
request.ContentType = "text/xml;
charset=utf-8";
string reqBodyStr = "<ConvertRequest xmlns=\"http://Leadtools.Services.Raster.ServiceContracts/2009/01\">";
reqBodyStr += "<ConvertOptions xmlns:a=\"http://Leadtools.Services.Raster.DataContracts/2009/01\" ";
reqBodyStr += "xmlns:i=\"http://www.w3.org/2001/XMLSchema-instance\"><a:BackColor i:nil=\"true\"/>";
reqBodyStr += "<a:BitsPerPixel>16</a:BitsPerPixel><a:Destination i:type=\"b:FileBinaryData\" xmlns:b=\"";
reqBodyStr += "http://Leadtools.Services.DataContracts/2009/01\"><b:FileName>c:\\out.cmp</b:FileName></a:Destination>";
reqBodyStr += "<a:FirstPage>1</a:FirstPage><a:Format>cmp</a:Format><a:Height>0</a:Height><a:HorizontalAlignMode>Near";
reqBodyStr += "</a:HorizontalAlignMode><a:LastPage>-1</a:LastPage><a:QualityFactor>2</a:QualityFactor><a:ResizeFlags>";
reqBodyStr += "None</a:ResizeFlags><a:ResizeMode>Normal</a:ResizeMode><a:Source i:type=\"b:FileBinaryData\" xmlns:b=\"";
reqBodyStr += "http://Leadtools.Services.DataContracts/2009/01\"><b:FileName>c:\\image1.jpeg</b:FileName></a:Source>"; 
reqBodyStr += "<a:VerticalAlignMode>Near</a:VerticalAlignMode><a:Width>0</a:Width></ConvertOptions></ConvertRequest>";
byte[] reqBodyBytes = Encoding.UTF8.GetBytes(reqBodyStr);
request.GetRequestStream().Write(reqBodyBytes, 0, reqBodyBytes.Length);
request.GetRequestStream().Close();
HttpWebResponse response;
try
{
   response = (HttpWebResponse)request.GetResponse();
}
catch (WebException web)
{

 response = (HttpWebResponse)web.Response;
}

8. Build, and Run the program to test it.

Method 2:

1. Continue to use the project created in Method 1 above. From the Visual Studio Toolbox, create a standard button and name it to 'Method 2'.

2. Switch to Form1 code view (right-click Form1 in the solution explorer then select View Code) and add the following lines at the beginning of the file:

[Visual Basic]

				
Imports System.IO

[C#]

					
using System.IO;

3. Add the following code to the 'Method 2' Button's Click function:

[Visual Basic]

						
Dim request As HttpWebRequest = CType(HttpWebRequest.Create("http://localhost:8080/LeadtoolsServicesHost/RasterService.svc/ConvertImage?
uri=\\MyMachine\SharedFolder\1.tif&format=jpeg"), HttpWebRequest)
request.Method = "GET"
Dim buffer() As Byte = New Byte((1024 * 64) - 1) {}
Dim totalBytesRead As Integer = 0
Dim ms As MemoryStream = New MemoryStream()
Dim response As HttpWebResponse
Try response = CType(request.GetResponse(), HttpWebResponse)
   Dim responseStream As Stream = response.GetResponseStream()
   Dim bytesRead As Integer
   bytesRead = responseStream.Read(buffer, 0, buffer.Length)
   While (bytesRead > 0)
      bytesRead = responseStream.Read(buffer, 0, buffer.Length)
      totalBytesRead += bytesRead ms.Write(buffer, 0, bytesRead)
      bytesRead = responseStream.Read(buffer, 0, buffer.Length)
   End While
   File.WriteAllBytes("c:\\result.jpeg", ms.ToArray())
   Catch web As WebException
   response = CType(web.Response, HttpWebResponse)
End Try

[C#]

							
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create("http://localhost:8080/LeadtoolsServicesHost/RasterService.svc/ConvertImage?
uri=\\\\MyMachine\\SharedFolder\\1.tif&format=jpeg");
req.Method = "GET";
byte[] buffer = new byte[1024 * 64];
int totalBytesRead = 0;
MemoryStream ms = new MemoryStream();
HttpWebResponse resp;
try
{
   resp = (HttpWebResponse)req.GetResponse();
   Stream responseStream = resp.GetResponseStream();
   int bytesRead;
   while ((bytesRead = responseStream.Read(buffer, 0, buffer.Length)) > 0)
   {
      totalBytesRead += bytesRead;
      ms.Write(buffer, 0, bytesRead);
   }
   File.WriteAllBytes("c:\\result.jpeg", ms.ToArray());
}
catch (WebException web)
{
   resp = (HttpWebResponse)web.Response;
}

4. Build, and Run the program to test it.