停止Html.ValidationSummary()更改验证消息的顺序 [英] Stop Html.ValidationSummary() from changing the order of validation messages

问题描述

在ValidationSummary中，为什么显示消息的顺序与将错误添加到ModelState的顺序不同，我该如何解决?

解决方案

asp.net mvc是开源的，因此您可以直接查看ValidationSummary的代码.

http://www.asp.net/mvc/download/

也就是说，我很确定ModelState是一个字典.因此，如果ValidationSummary遍历ModelState词典中的键/值以查找错误，则顺序将是随机的.

---

我在工作时下载了代码.来自MVC/Html/ValidationExtensions.cs中的ValidationSummary:

foreach (ModelState modelState in htmlHelper.ViewData.ModelState.Values) {
    foreach (ModelError modelError in modelState.Errors) {
        // stuff to build a string with the error
    }
}

因此它正在遍历字典中的值.从MSDN:

出于枚举目的，字典中的每个项目都被视为代表值及其键的KeyValuePair(TKey，TValue)结构. 退回商品的顺序不确定.

和

Dictionary(TKey，TValue).ValueCollection中的值顺序为未指定

强调我的.

In a ValidationSummary, why are the messages shown in a different order than the order you added errors to the ModelState and how might I fix this?

解决方案

asp.net mvc is open source so you can see the code for ValidationSummary directly.

http://www.asp.net/mvc/download/

That said, I'm pretty sure ModelState is a dictionary. So if ValidationSummary is iterating over the key/values in the ModelState dictionary looking for errors the order is going to be random.

---

I downloaded the code at work. From ValidationSummary in MVC/Html/ValidationExtensions.cs:

foreach (ModelState modelState in htmlHelper.ViewData.ModelState.Values) {
    foreach (ModelError modelError in modelState.Errors) {
        // stuff to build a string with the error
    }
}

So it is iterating over the values in the dictionary. And from MSDN:

For purposes of enumeration, each item in the dictionary is treated as a KeyValuePair(TKey, TValue) structure representing a value and its key. The order in which the items are returned is undefined.

and

The order of the values in the Dictionary(TKey, TValue).ValueCollection is unspecified

Emphasis mine.

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