RIA 服务默认必需属性

发布于 2024-11-15 08:02:19 字数 1072 浏览 0 评论 0原文

我有一个 EF4 模型，其中表的列不允许为空。在 SL 客户端应用程序中，我总是收到“columnName is required”，因为我在 xaml 中绑定了文本框的 [NotifyOnValidationError=True,ValidatesOnExceptions=True]。

我的问题是：我可以覆盖元数据类中默认所需的错误消息，但如何将其作为自定义验证？我的意思是我不想在密封元数据类中执行此操作：

[Required(ErrorMessage = "Coin English Name Is required")]
[CustomValidation(typeof (CustomCoinVaidation), "ValidateCoinName")]
public string coin_name_1 { get; set; }

我希望将其放在自定义验证方法中，我将为与 coin_name_1 相关的所有类型的错误定义该方法，如下所示：

    public static ValidationResult ValidateCoinName(string name, ValidationContext validationContext)
    {
        if (string.IsNullOrWhiteSpace(name))
        {
            return new ValidationResult("The Coin Name should be specified", new [] { "Coin Name" });
        }
        return ValidationResult.Success;
    }

为什么？

有两个原因： 1-将所有验证分组为一个容器（以便进一步轻松本地化）。 2-我不希望将 coin_name_1 显示给最终用户，而是有意义的“硬币英文名称”。

第二个问题：我的 xaml 页面上有一个 ValidationSummary 控件，其中显示所有错误，但显示列“coin_name_1”的原始名称，我怎样才能将其更改为有意义的值。

此致瓦利德

原文

I have an EF4 model with table's columns doesn't allow null.
At the SL client application I always receieve the "columnName is required" because I have the binding in xaml with [NotifyOnValidationError=True,ValidatesOnExceptions=True] for the textboxes.

My questions is:
I can overide the default required errormessage at the metadata class, but how can I have it as a custom validation? I mean I don't wnat to do this at the sealed metadata class:

[Required(ErrorMessage = "Coin English Name Is required")]
[CustomValidation(typeof (CustomCoinVaidation), "ValidateCoinName")]
public string coin_name_1 { get; set; }

I want to have it inside the custom validation method that I will define for all types of errors regards that coin_name_1, as follows:

    public static ValidationResult ValidateCoinName(string name, ValidationContext validationContext)
    {
        if (string.IsNullOrWhiteSpace(name))
        {
            return new ValidationResult("The Coin Name should be specified", new [] { "Coin Name" });
        }
        return ValidationResult.Success;
    }

Why?

for two reasons :
1- Group all the validation isdie one container (for easy localization further).
2- I don't want the coin_name_1 to be displayed to the end-user, but a meanigful as "Coin English Name".

Second question:
I have a ValidationSummary control on my xaml page where all the errors are displayed but is displaying the orignal name of the column "coin_name_1" how can I chnge that to be a meanigfil also.

Best regards
Waleed

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