How retrieve the claim value inside a Razor page-CodePudding

I have set some values with claims when the system logging.

public async Task<IActionResult> Login(string txtUserName, string txtPassword)
{
   string username = txtUserName;
   var claims = new List<Claim>
   {
     new Claim("username",username)
   };
}

Now I wants to access the claim values in the Razor page. I try to access with flowing code line that @((ClaimsIdentity) User.Identity).GetSpecificClaim("username") in my Razor page but it's not works.

<div >
    <a ><p>Website name</p></a>
    <div >
       <i ></i>
                   
       <a ><p>@((ClaimsIdentity)User.Identity).GetSpecificClaim("username")</p></a>


    </div>

</div>

CodePudding user response：

You can add claims to HttpContext.User in backend like below:

public async Task<IActionResult> Login(string txtUserName, string txtPassword)
{
    string username = txtUserName;
    var claims = new List<Claim>
    {
        new Claim("username",username)
    };
    var appIdentity = new ClaimsIdentity(claims);
    HttpContext.User.AddIdentity(appIdentity); 

    //....
}

Then get the claims in frontend like below:

@User.FindFirst("username").Value