对于型号列表远程验证 [英] Remote Validation for LIST of MODELs

问题描述

我用下面的教程：
http://msdn.microsoft.com/en-us /library/gg508808%28VS.98%29.aspx

和一切似乎都很好，但在我的例子中，字符串用户名总是回来空。经过研究万吨，我发现大家发现BIND prefixes。这将在许多情况下是巨大的，但不是这一个。我要指出的所有属性和名称在我的for循环中，EditorFor创建[I] .Username然而现场排队，这不映射到任何模型属性。

问：我想我要地图[I] .Username到名，其中i为任意数量从0无穷远，所以当它得到的值传递给正确的行动。我该怎么做呢？如果这是错的，我该怎么办验证此为表中的特定行？

\r

\r

@for（VAR I = 0; I＆LT; Model.Count;我++）\r
{\r
  等等等等等等code建筑表行\r
  ＆所述; TD＆GT;\r
     @ Html.EditorFor（modelItem =＆GT;产品型号[I] .Username）\r
  ＆LT; / TD＆GT;\r
}

\r

\r

\r

因为我可以在技术上有数百如果不是成千上万的记录，我宁愿没有具有约束力的preFIX所有1000我在这里从根本上失去了一些东西？我是新来的ASP.NET MVC并习惯了对WebForms的，所以我觉得自己有时候我混合概念和混搭的东西是完全错误的。

编辑：
我固定它通过执行以下，但不知道这是否是最好的主意。我设定的参数等于没有[I] preFIX的字段名，但仍检索与[I] preFIX的元素。 JavaScript是不是我的专长，所以请让我知道，如果它是可怕的。

  adapters.add（远程，[网址，型，additionalfields]，功能（选件）{
    VAR值= {
        网址：options.params.url，
        类型：options.params.type || 得到，
        数据：{}
    }，
        preFIX = getModel preFIX（options.element.name）;    $。每个（splitAndTrim（options.params.additionalfields || options.element.name），功能（I，字段名）{        变种paramName配置= fieldName.substr（fieldName.lastIndexOf（）+1。）;        VAR actualFieldName = appendModel preFIX（字段名，preFIX）
        value.data [paramName配置] =功能（）{
            。返回$（options.form）.find（：输入）过滤器（[名='+ escapeAttributeValue（actualFieldName）+']）VAL（）;
        };
    }）;    setValidationValues​​（选项，远程，值）;
}）;
 

解决方案

您还没有发布您的code为模型或控制器，但假设你有一个 RemoteAttribute 适用于财产用户名，例如：

 公共类为MyModel
{
  [远程（IsValidUserName，人）]
  公共字符串用户名{获得;组; }
}
 

在 PersonController

的方法

 公共JsonResult IsValidUserName（字符串用户名）
{
  ....
}
 

和视图

  @model名单＆LT;＆人GT;
...
@for（VAR I = 0; I＆LT; Model.Count;我++）
{
  @ Html.EditorFor（M = GT; M [​​] .Username）
}
 

这将生成html如

 ＆LT;输入名称=[0] .UserName... /＆GT;
＆LT;输入名称=[1] .UserName... /＆GT;
 

不幸的是，远程方法 jQuery的-验证回发的名称和元素的值，使得AJAX调用看起来像

  $。阿贾克斯（{
  网址：'/人/ IsValidUserName'，
  数据：{[0] .UserName：[e-mail]}，
  ...
 

这将不绑定。

我报告这是在codePLEX 的问题有可能解。在此期间，你可以修改远程方法 jQuery的-validate.js 文件如下：

 远程：函数（值，元素，参数）{
  ....
  VAR数据= {};
  //数据[element.name] =价值;
  数据[element.name.substr（element.name.lastIndexOf（）+1。）] =值; //添加此
 

，以使发布的数据是这将去掉preFIX

 数据：{用户名：[e-mail]}，
 

和将正确地绑定到方法

I used the following tutorial: http://msdn.microsoft.com/en-us/library/gg508808%28VS.98%29.aspx

And everything seemed fine, but in my case, string Username always comes back null. After tonnes of research, I found everyone discovered BIND Prefixes. That would be great in many circumstances, but not this one. I should note all properties and names line up, however in my for loop, the EditorFor creates a [i].Username field and this doesn't map to any model property.

QUESTION: I think I want to map [i].Username to Username where i is any number from 0-infinity, so when it GETS, the value is passed to the Action properly. How do I do this? If this is wrong, what do I do validate this for a specific row in a table?

@for (var i = 0; i < Model.Count; i++)
{
  BLAH BLAH BLAH CODE FOR BUILDING TABLE ROWS
  <td>
     @Html.EditorFor(modelItem => Model[i].Username)
  </td>                               
}

Since I could technically have HUNDREDS if not THOUSANDS of records, I would rather not had a binding PREFIX for all 1000. Am I fundamentally missing something here? I am new to ASP.NET MVC and am used to WebForms so I feel like sometimes I am mixing concepts and mashing up something that is entirely wrong.

EDIT: I fixed it by doing the following, but not sure if this is the best idea. I set the parameter equal to the FieldName without [i] prefix, but still retrieve the element with the [i] prefix. Javascript isn't my Forte so please let me know if it is horrible.

adapters.add("remote", ["url", "type", "additionalfields"], function (options) {
    var value = {
        url: options.params.url,
        type: options.params.type || "GET",
        data: {}
    },
        prefix = getModelPrefix(options.element.name);

    $.each(splitAndTrim(options.params.additionalfields || options.element.name), function (i, fieldName) {

        var paramName = fieldName.substr(fieldName.lastIndexOf(".") + 1);

        var actualFieldName = appendModelPrefix(fieldName, prefix)
        value.data[paramName] = function () {
            return $(options.form).find(":input").filter("[name='" + escapeAttributeValue(actualFieldName) + "']").val();
        };
    });

    setValidationValues(options, "remote", value);
});

解决方案

You have not posted your code for the model or controller, but assuming you have a RemoteAttribute applied to property Username, for example

public class MyModel
{
  [Remote("IsValidUserName", "Person")]
  public string Username { get; set; }
}

with a method in PersonController

public JsonResult IsValidUserName(string Username)
{
  ....
}

and the view

@model List<Person>
...
@for (var i = 0; i < Model.Count; i++)
{
  @Html.EditorFor(m => m[i].Username)                           
}

This will generate html such as

<input name="[0].UserName" ... />
<input name="[1].UserName" ... />

Unfortunately the remote method in jquery-validate posts back the name and value of the element so that the ajax call looks like

$.ajax({
  url: '/Person/IsValidUserName',
  data: { [0].UserName: '[e-mail]' },
  ...

which will not bind.

I have reported this as an issue at Codeplex with a possible solution. In the meantime you can modify the remote method in jquery-validate.js file as follows

remote: function(value, element, param) {
  ....
  var data = {};
  // data[element.name] = value;
  data[element.name.substr(element.name.lastIndexOf(".") + 1)] = value; // add this

This will strip the prefix so that the posted data is

 data: { UserName: '[e-mail]' },

and will correctly bind to the method.

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