Blazor异常处理

1 使用表单EditForm时，运行报错

    EditForm requires either a Model parameter, or an EditContext paramete

    表单如下：

<EditForm class="mt-3" Model="UserClaims" OnValidSubmit="HandleValidSubmit">

@code {
    [Parameter]
    public string UserId { get; set; } = string.Empty;
    public CustomUserClaimsViewModel UserClaims { get; set; }；

    原因： UserClaims这个表单的model没有初始化。

    给model初始化：public CustomUserClaimsViewModel UserClaims { get; set; } = new();

    完整如下：

<EditForm class="mt-3" Model="UserClaims" OnValidSubmit="HandleValidSubmit">

@code {
    [Parameter]
    public string UserId { get; set; } = string.Empty;
    public CustomUserClaimsViewModel UserClaims { get; set; } = new();