Question

我的用户模型具有这些数据注释以验证输入字段：

[Required(ErrorMessage = "Username is required")]
[StringLength(16, ErrorMessage = "Must be between 3 and 16 characters", MinimumLength = 3)]
public string Username { get; set; }

[Required(ErrorMessage = "Email is required"]
[StringLength(16, ErrorMessage = "Must be between 5 and 50 characters", MinimumLength = 5)]
[RegularExpression("^[a-zA-Z0-9_.-]+@[a-zA-Z0-9-]+.[a-zA-Z0-9-.]+$", ErrorMessage = "Must be a valid email")]
public string Email { get; set; }

[Required(ErrorMessage = "Password is required"]
[StringLength(255, ErrorMessage = "Must be between 5 and 255 characters", MinimumLength = 5)]
public string Password { get; set; }

[Required(ErrorMessage = "Confirm Password is required"]
[StringLength(255, ErrorMessage = "Must be between 5 and 255 characters", MinimumLength = 5)]
public string ConfirmPassword { get; set; }

但是，我在确定如何确保确认密码与密码相同时遇到问题。据我所知，只存在这些验证程序：Required, StringLength, Range, RegularExpression。

我可以在这做什么？感谢。

Answer 1

如果您使用的是ASP.Net MVC 3，则可以使用System.Web.Mvc.CompareAttribute。

如果您使用的是ASP.Net 4.5，则它位于System.Component.DataAnnotations。

[Required(ErrorMessage = "Password is required")]
[StringLength(255, ErrorMessage = "Must be between 5 and 255 characters", MinimumLength = 5)]
[DataType(DataType.Password)]
public string Password { get; set; }

[Required(ErrorMessage = "Confirm Password is required")]
[StringLength(255, ErrorMessage = "Must be between 5 and 255 characters", MinimumLength = 5)]
[DataType(DataType.Password)]
[Compare("Password")]
public string ConfirmPassword { get; set; }

编辑：对于MVC2使用以下逻辑，使用PropertiesMustMatch代替Compare属性[以下代码是从默认的MVCApplication项目模板中复制的。]

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Property, AllowMultiple = true, Inherited = true)]
public sealed class PropertiesMustMatchAttribute : ValidationAttribute
{
    private const string _defaultErrorMessage = "'{0}' and '{1}' do not match.";
    private readonly object _typeId = new object();

    public PropertiesMustMatchAttribute(string originalProperty, string confirmProperty)
        : base(_defaultErrorMessage)
    {
        OriginalProperty = originalProperty;
        ConfirmProperty = confirmProperty;
    }

    public string ConfirmProperty { get; private set; }
    public string OriginalProperty { get; private set; }

    public override object TypeId
    {
        get
        {
            return _typeId;
        }
    }

    public override string FormatErrorMessage(string name)
    {
        return String.Format(CultureInfo.CurrentUICulture, ErrorMessageString,
            OriginalProperty, ConfirmProperty);
    }

    public override bool IsValid(object value)
    {
        PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(value);
        object originalValue = properties.Find(OriginalProperty, true /* ignoreCase */).GetValue(value);
        object confirmValue = properties.Find(ConfirmProperty, true /* ignoreCase */).GetValue(value);
        return Object.Equals(originalValue, confirmValue);
    }
}

Answer 2

其他数据注释是可选的，您可以根据需要添加这些注释，但是您需要这样做才能实现密码比较操作

decimal xreqNo;

bool isDecimalValue = decimal.TryParse(this.TextBox1.Text, out xreqNo);
if (isDecimalValue)
{
    cmnd.Parameters.Add("xreq_no", OleDbType.Numeric, 8).Value = xreqNo; 
}

Answer 3

您可以使用compare注释比较两个值，并且如果需要确保它在下游的任何地方都不持久（例如，如果您使用的是EF），还可以添加NotMapped来忽略任何实体-> DB映射

有关可用数据注释的完整列表，请参见此处：

https://msdn.microsoft.com/en-us/library/system.componentmodel.dataannotations(v=vs.110).aspx

[Required]
[DataType(DataType.Password)]
public string Password { get; set; }

[Required]
[DataType(DataType.Password)]
[Compare("Password")]
[NotMapped]
public string ConfirmPassword { get; set; }

数据注释以验证确认密码

3 个答案: