Getting return value of null every time to Controller-CodePudding

Receiving Null value every time to Controller. How can I solve this?

Url: http://localhost:45801/Account/Login?ReturnUrl=/order/placeorder

Code:

    [HttpPost]
    public async Task<IActionResult>Login(UserLoginVM userLoginVM,string ReturnUrl)
    {
        if (ModelState.IsValid)
        {
            var result = await signInManager.PasswordSignInAsync
                (userLoginVM.LoginId, userLoginVM.Password, userLoginVM.RememberMe, false);

            if(result.Succeeded)
            {
                if(!string.IsNullOrEmpty(ReturnUrl))
                {
                    return RedirectToAction(ReturnUrl);
                }
                else
                {
                   return RedirectToAction("Index", "Home");
                }    
            }
            ModelState.AddModelError("","Invalid username and password");
        }
        return View(userLoginVM);
    }

CodePudding user response：

You need to add [FromBody] before UserLoginVM and [FromQuery] before string , so your action method sign should be like this :

public async Task<IActionResult>Login([FromBody] UserLoginVM userLoginVM,[FromQuery] string ReturnUrl)

CodePudding user response：

You should add [FromQuery] or [FromBody] attribute to the parameters.

Adding [FromBody] attribute to the parameter, force Web API to read from the request body.

Adding [FromQuery] attribute to the parameter, force Web API to gets values from the query string.

[HttpPost]
public async Task<IActionResult>Login([FromBody] UserLoginVM userLoginVM,[FromQuery] string ReturnUrl)
{
...
}

CodePudding user response：

You must send the return url in the get method to view using ViewData as shown below.

[HttpGet]
public IActionResult Login(string ReturnUrl)
{
   ViewData["ReturnUrl"]=ReturnUrl;
    return View();
}

and your view should like this :

 <form asp-controller="Account" asp-action="Login"
   asp-route-returnurl="@ViewData["ReturnUrl"]"
   method="post"  >

  </form>