禁止ASP.NET MVC模型绑定时将空字符串绑定为null

为model添加[DisplayFormat(ConvertEmptyStringToNull = false)]

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[Display(ResourceType = typeof(AppStrings), Name = "MD_Company_ContactPhone")] [StringLength(100, ErrorMessageResourceType = typeof(AppStrings), ErrorMessageResourceName = "ValidationMessageMaxLength")] [DisplayFormat(ConvertEmptyStringToNull = false)] public string ContactPhone { get; set; }