/// <summary>
/// 把ModelState错误 添加到 BadRequestObjectResult对象里
/// </summary>
/// <param name="controller"></param>
/// <param name="key">错误Key</param>
/// <param name="error">错误信息</param>
/// <returns>BadRequestObjectResult</returns>
public static BadRequestObjectResult ModelStateError(this ControllerBase controller, string key, string error)
{
controller.AddStateError(key, error);
return controller.BadRequest(controller.ModelState);
}