为什么我的blazor的@bind值返回错误

Question

嗨，我正在尝试创建一个与我的模型相对应的输入字段，如果所需字段为null，则它会向您显示填充字段的信息，但会导致错误。

这是我的型号：

public class ToDoItem
{
public DateTime? DueDate { get; set; }
[Required]
public string? ToDo { get; set; }
}

这是我的输入字段

<input id = "txtToDo" @bind-value = "@ToDoItem.ToDo" placeholder = "What You Need To Do" />
<input type = "datetime-local" @bind = "DueDate" placeholder = "Due Date" />
<button @onclick = "Save">Save</button>

这是我的错误

Severity    Code    Description Project File    Line    Suppression State
Error (active)  CS0120  An object reference is required for the non-static field, method, or property 'ToDoItem.ToDo'       e:KerjaMencobaSimpleDemoSimpleDemoPagesToDo.razor 15  

Answer 1

<EditForm Model="item">
<input id = "txtToDo" @bind-Value = "@item.ToDo" placeholder = "What You Need To Do" />
<button @onclick = "Save">Save</button>
</EditForm>
@code
{
ToDoItem item = new();
...
}

这里CCD_；对象引用"；(例如(错误告诉你是需要的。

Answer 2

您正试图使用类名访问非静态成员。若要解决此错误，您需要更改静态成员或创建对象的实例。

@using System.ComponentModel.DataAnnotations
<input id = "txtToDo" @bind-value = "@ToDoItem.ToDo" placeholder = "What You Need To Do" />
<input type = "datetime-local" @bind = "@ToDoItem.DueDate" placeholder = "Due Date" />
<button @onclick = "Save">Save</button>
@code{
private void Save(){
}

public class ToDoItem
{
public static DateTime? DueDate { get; set; } 
[Required]
public static string? ToDo { get; set; }
}
}