xiazanzhang / dotnet5 Goto Github PK

本来想下载后，看看运行代码，却无法正常运行。检查了nlog发现
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware|The response has already started, the error page middleware will not be executed.

原因是在UserModel.cs里的Required符合但不会出现ErrorMessage
[Required(ErrorMessage = "请输入邮箱")]
[Required(ErrorMessage = "请输入密码")]
[Required(ErrorMessage = "请输入邮箱")]
[EmailAddress(ErrorMessage = "请输入正确的邮箱地址")]
[Required(ErrorMessage = "请输入用户名")]
[MaxLength(length: 12, ErrorMessage = "用户名最大长度不能超过12")]
[MinLength(length: 2, ErrorMessage = "用户名最小长度不能小于2")]
[Required(ErrorMessage = "请输入密码")]
[MaxLength(length: 20, ErrorMessage = "密码最大长度不能超过20")]
[MinLength(length: 6, ErrorMessage = "密码最小长度不能小于6")]

最后解决方法如下是增加 if (!context.Response.HasStarted) 在ErrorHandlingMiddleware.cs 里

// 异常错误信息捕获，将错误信息用Json方式返回
```
private static Task HandleExceptionAsync(HttpContext context, int statusCode, string msg)
{
if (!context.Response.HasStarted)
{
var result = JsonConvert.SerializeObject(new { Msg = msg, Code = statusCode });
context.Response.ContentType = "application/json;charset=utf-8";
return context.Response.WriteAsync(result);
}
else
{
return context.Response.WriteAsync(string.Empty);
}
}