如何将WebAPI添加到ASPX网页

Question

I have a website that display the page -Default.aspx, Now I added a webapi controler class to the project., how can I get it running., ie, if I just create a Post request with my URL it is not working. below is my webapi controller class, how can I integrate this to my current website- so I can do post requests and get the return string.

public class Valcontrol : ApiController
{
    // GET api/<controller>
    public IEnumerable<string> Get()
    {
        return new string[] { "value1", "value2" };
    }
    // GET api/<controller>/5
    public string Get(int id)
    {
        return "value";
    }

    // POST api/<controller>
    public String Post([FromBody]string value)
    {
       return "Test";              
    }

    // PUT api/<controller>/5
    public void Put(int id, [FromBody]string value)
    {
    }

    // DELETE api/<controller>/5
    public void Delete(int id)
    {
    }
}

If I do a Post request to "www.xyz.in" am getting the whole webpage in my return stream instead of the string "Test" that I am returning in my Post function above.

Client call in my App - Java code:

    URL url = new URL("http://www.xyz.in/");
            // get the payuConfig first
            String postParam = "Dev";  
            byte[] postParamsByte = postParam.getBytes("UTF-8");
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            conn.setRequestProperty("Content-Length", String.valueOf(postParamsByte.length));
            conn.setDoOutput(true);
            conn.getOutputStream().write(postParamsByte);
            InputStream responseInputStream = conn.getInputStream();
            StringBuffer responseStringBuffer = new StringBuffer();
            byte[] byteContainer = new byte[1024];
            for (int i; (i = responseInputStream.read(byteContainer)) != -1; ) {
                responseStringBuffer.append(new String(byteContainer, 0, i));
            }
            String strResponse = responseStringBuffer.toString();

Below is the content that got added to my web.config(by visual studio) file when I added webapi class to my project.

 <system.webServer>
<handlers>
  <remove name="ExtensionlessUrlHandler-ISAPI-4.0_32bit"/>
  <remove name="ExtensionlessUrlHandler-ISAPI-4.0_64bit"/>
  <remove name="ExtensionlessUrlHandler-Integrated-4.0"/>
  <add name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness32" responseBufferLimit="0"/>
  <add name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness64" responseBufferLimit="0"/>
  <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0"/>
</handlers>

Answer 1

This swill not work Valcontrol is not a valid name for a controller. Controllers need to have the Suffix Controller in order for them to map correctly.

So you need to change the name to ValController, or ValControlController.

[Route("api/[controller]")]
public class ValController : ApiController
{
    // GET api/<controller>
    public IEnumerable<string> Get()
    {
        return new string[] { "value1", "value2" };
    }
    // GET api/<controller>/5
    public string Get(int id)
    {
        return "value";
    }

    // POST api/<controller>
    public String Post([FromBody]string value)
    {
       return "Test";              
    }

    // PUT api/<controller>/5
    public void Put(int id, [FromBody]string value)
    {
    }

    // DELETE api/<controller>/5
    public void Delete(int id)
    {
    }
}

then make your post request like so:

POST  api/val?value=Test

and change your headers to Content-Type:application/json