asp.net core webapi is not hitting or the frombody parameter is coming as null

Question

User1838940990 posted

Hi All,

I am very new to  the webapi and am developing a api from the scratch (asp.net core 3.0)

IT has a functionality to update and insert the xml.

Please excuse , i have used the verbs for the api methods to easily explain the problem

PFB my controller and the startup.cs file 

scenario1

If I select the content as JSON and if I pass a string in quotes  for eg ("This is JSON string "), both the put and post methods are getting hit and   I can see the string value is passed in the parameter and I can capture the value from the FromBody parameter,

but if I pass the XML  and tried setting the options as JSON and tried to send , but didnt worked

scenario2: 

If I pass the value as XML  or Text from the postman and  select the option as zml or text and If I paste a sample XML in Raw>>Body  it is not even hitting the API method,  the request just reached the controllers constructor and return 

I even tried changing [FromBody] string jobXml   to XMLDocument type as well  [FromBody] XmlDocument jobXml 

can anybody help me to find If am doing anything wrong here.

Controller class

[Route("myapi/[controller]")]
public class JobController : Controller
{

[HttpPost]
[Route("updatejob")]
public async Task<string> UpdateJobAsync( [FromBody] string jobXml)
{
doSoemthing;
}

[HttpPut]
[Route("putjob")]
public async Task<string> PutJobAsync([FromBody] string jobXml)
{
doSoemthing;
}

startup class

public class Startup
{

public IConfiguration Configuration { get; }

public Startup(IConfiguration configuration)
{
Configuration = configuration;
}

// This method gets called by the runtime. Use this method to add services to the container.
// For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
public void ConfigureServices(IServiceCollection services)
{
services.AddCors();
services.AddControllers();
services.Configure<AXConfig>(Configuration.GetSection("AXConfig"));
}

// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}

app.UseRouting();

app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}

Answer 1

User711641945 posted

Hi techasuran,

First,you need to add support for xml:

public void ConfigureServices(IServiceCollection services)
{
    services.AddControllers().AddXmlSerializerFormatters();
}

Then you could send request like below:

Controller:

[HttpPost]
[Route("updatejob")]
public async Task<string> UpdateJobAsync([FromBody] XmlDocument jobXml)
{
    //do your stuff...

Best Regards,

Rena

Answer 2

User1838940990 posted

Thanks very much for  the quick reply. Its working fine now.