HTTP PUT is not working in ASP.NET Web API

Question

I have simple Web API controller in which GET and POST are working but PUT and DELETE is not working. Server throws The requested resource does not support http method 'PUT' error when accessing PUT and DELETE Here is how web.config looks like:

<?xml version="1.0" encoding="utf-8"?>
    <configuration>
        <configSections>
            <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
        </configSections>
        <system.web>
            <compilation debug="true" targetFramework="4.5.2">
                <assemblies>
                    <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
                </assemblies>
            </compilation>
            <httpRuntime targetFramework="4.5.2" />
            <httpModules>
                <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" />
            </httpModules>
        </system.web>
        <system.webServer>
            <validation validateIntegratedModeConfiguration="false" />
            <modules>
                <remove name="ApplicationInsightsWebTracking" />
                <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" preCondition="managedHandler" />
            </modules>
            <handlers>
                <remove name="ExtensionlessUrlHandler-Integrated-4.0" />      
                <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
            </handlers>
        </system.webServer>
        <runtime>
            <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
                <dependentAssembly>
                    <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" culture="neutral" />
                    <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
                </dependentAssembly>
                <dependentAssembly>
                    <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" culture="neutral" />
                    <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
                </dependentAssembly>
            </assemblyBinding>
        </runtime>
        <system.codedom>
            <compilers>
                <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:6 /nowarn:1659;1699;1701" />
                <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:14 /nowarn:41008 /define:_MYTYPE=\&quot;Web\&quot; /optionInfer+" />
            </compilers>
        </system.codedom>    
    </configuration>

Code for Global.asax

protected void Application_Start(object sender, EventArgs e)
{
    GlobalConfiguration.Configure(WebApiConfig.Register);
}

Code for Web API Configuration

public static void Register(HttpConfiguration config)
{
    config.MapHttpAttributeRoutes();
    config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{Id}",
            defaults: new { Id = RouteParameter.Optional }
    );
}

And the controller has...

public class GroupsController : ApiController
{
    [System.Web.Http.HttpPut]
    public ActionResult Put(int Id, [FromBody]Group NewGroup)
    {
        //some code here
    }
}

I have also looked into online resource but none of those are helping out... here and here

I'm trying to make this API working in developer machine (IIS express/compact one that ships with Visual Studio).

Answer 1

It seems that you not pass id as url part. For example "put /api/Groups" will return this error, but "put /api/Groups/1" must work correctly.

Answer 2

Have you looked into the default route

config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{action}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );

routeTemplate: "api/{controller}/{action}/{id}",

The {action} is missing from your config.

and API, for reference :

[HttpPut]
public IHttpActionResult Hero(int Id)

The Below API Call works

http://localhost:48613/api/SuperHumans/Hero/1

The Below API Call WON'T work as the API route won't match

http://localhost:48613/api/SuperHumans/Hero

Also make sure you are passing correct content type from the client

EDIT -2

REST API

[System.Web.Http.HttpPut]
public void Put(int id, Dummy value)
{

}

Property Class

public class Dummy
{
    public string key1 { get; set; }
    public string key2 { get; set; }
}

POSTMAN REST CALL

Debugger