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kdaic1712 · Jul 1 '21, 10:18 AM

I work at Blazor (C #) Server- Side. I am trying to save data to a database when registering a user (when I press the register button), but the following error occurs:
System.NullRefe renceException: 'The object reference is not set on the object instance.' <> 4__this._dataCo ntext.

I read on the Internet about that mistake, but I couldn't figure out what the problem was with me.

Find the code snippets below:...

kdaic1712 · Jun 30 '21, 08:21 AM

Code:

User.cs:
[Table("Users")]
    public class User
    {
        [Display(AutoGenerateField = false)]
        public int UserId { get; set; }

        [Display(Name = "UserName")]
        [Required(ErrorMessage = "UserName is required.")]
        public string UserName { get; set; }

        [Display(Name = "Password")]

...

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