How to Consume LEADTOOLS WCF as REST Services

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.