WCF将图像流式传输到Web [英] WCF Stream an image to a Web

问题描述

我正在尝试将图像从WCF返回到Web应用程序，并保持收到此错误消息：响应消息的内容类型image / jpeg与绑定的内容类型不匹配（text / xml; charset = UTF-8）。如果使用自定义编码器，请确保正确实现IsContentTypeSupported方法。



Web应用程序页面调用WCF返回图像：

I'm trying to return an image from WCF to a web application, and kept received this error message: The content type image/jpeg of the response message does not match the content type of the binding (text/xml; charset=utf-8). If using a custom encoder, be sure that the IsContentTypeSupported method is implemented properly.

The web application page calls the WCF to return an image:

srQRCode.QRCodeClient qrCode = new srQRCode.QRCodeClient();
Stream image = qrCode.GetImage();

WCF qrCode.cs

WCF qrCode.cs

[OperationContract]
[WebInvoke(Method = "GET")]
Stream GetImage();

qrCode.svc.cs

qrCode.svc.cs

public Stream GetImage()
       {
           int width = 300;
           int height = 300;
           Bitmap bitmap = new Bitmap(width, height);
           for (int i = 0; i < bitmap.Width; i++)
           {
               for (int j = 0; j < bitmap.Height; j++)
               {
                   bitmap.SetPixel(i, j, (Math.Abs(i - j) < 2) ? Color.Blue : Color.Yellow);
               }
           }
           MemoryStream ms = new MemoryStream();


           bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
           ms.Position = 0;
           WebOperationContext.Current.OutgoingRequest.Headers.Add("Slug", "title");
           WebOperationContext.Current.OutgoingRequest.Method = "GET";
           WebOperationContext.Current.OutgoingResponse.ContentType = "image/jpeg";

           return ms;
       }

WCF.WebConfig：

WCF.WebConfig:

<system.serviceModel>
    <bindings>
      <basicHttpBinding>
        <binding name="TransferService"   maxReceivedMessageSize="2147483647"  maxBufferSize="2147483647" transferMode="Streamed" >
          <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647"/>
          <security mode="None">
          </security>
        </binding>
      </basicHttpBinding>
    </bindings>
    <services>
      <service behaviorConfiguration="wcfQRCode.Service1Behavior" name="wcfQRCode.QRCode">
       <endpoint  address="" binding="basicHttpBinding"  contract="wcfQRCode.IQRCode" bindingConfiguration="TransferService"   >
          <identity>
            <dns value="localhost"/>
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="wcfQRCode.Service1Behavior">
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="imageBehavior">
          <webHttp />
        </behavior>
      </endpointBehaviors>
    </behaviors>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
  </system.serviceModel>

我在这里缺少什么？

What am I missing here?

推荐答案

这 [ ^ ]是研究特定错误消息的最佳方法。

This[^] is the best way to research specific error messages.

为什么不使用图像处理程序类（.ashx文件） ）

why not you using image handler class (.ashx file)

我用二维码做了同样的事情，这对我不起作用，如果你这样做，你能把代码寄给我吗，这是我的邮件m.alvear@outlook .com谢谢：D

I'm doing the same thing with QR code and it doesn't work me, can you send me the code if you did it, this is my mail [e-mail] thanks :D

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