ASP.NET MVC 2强类型的HtmlHelper，索引 [英] ASP.NET MVC 2 strongly typed htmlhelper, indexes

问题描述

 公共类Foo {公共BOOL经过{获取;集;}}
 

查看：

 ＆LT;可视数据模型=富[] fooList/＆GT;
＆lt;用于每=中fooList变种F＆GT;
    $ {H​​tml.CheckBoxFor（X =＆X的催化剂[fIndex] .Checked）}
＆LT; /为＆GT;
 

将输出：

 ＆LT;输入ID =选中NAME =选中类型=复选框VALUE =真/＆GT;
＆LT;输入名称=选中类型=隐藏值=FALSE/＆GT;＆LT;输入ID =选中NAME =选中类型=复选框VALUE =真/＆GT;
＆LT;输入名称=选中类型=隐藏值=FALSE/＆GT;＆LT;输入ID =选中NAME =选中类型=复选框VALUE =真/＆GT;
＆LT;输入名称=选中类型=隐藏值=FALSE/＆GT;
 

问题是， System.Web.Mvc.Ex pressionHelper.GetEx pressionText 不包括ID /名称索引。

这会导致问题的情况下，我想添加一个标签为每个复选框（因为所有id`s都是一样的）。

任何想法如何正确处理呢？

---

从MVC源=>

 同时（部分！= NULL）{
            如果（part.NodeType == System.Linq.Ex pressions.Ex pressionType.MemberAccess）{
                MemberEx pression memberEx pressionPart =（MemberEx pression）的一部分;
                nameParts.Push（memberEx pressionPart.Member.Name）;
                部分= memberEx pressionPart.Ex pression;
            }
            其他{
                // arghhhh ... [指数]！= MemberAccess :(
                打破;
            }
        }
 

解决方案

恩$ P $基于pssion-佣工了解指标的能力不是在产品还没有。这将是在未来的preVIEW发布（MVC 2 RC以后无论发生什么事）。请参见 HTTP：//aspnet.$c$cplex.com/WorkItem/ View.aspx？WorkItemId = 4970 。

public class Foo { public bool Checked {get;set;}}

View:

<viewdata model="Foo[] fooList" />
<for each="var f in fooList">
    ${Html.CheckBoxFor(x=>x[fIndex].Checked)}
</for>

Will output:

<input id="Checked" name="Checked" type="checkbox" value="true" />
<input name="Checked" type="hidden" value="false" />

<input id="Checked" name="Checked" type="checkbox" value="true" />
<input name="Checked" type="hidden" value="false" />

<input id="Checked" name="Checked" type="checkbox" value="true" />
<input name="Checked" type="hidden" value="false" />

Problem is that System.Web.Mvc.ExpressionHelper.GetExpressionText does not include index in id/name.

That leads to problems in case I want to add a label for every checkbox (because all id`s are the same).

Any ideas how to handle this properly?

---

From the MVC source=>

 while (part != null) {
            if (part.NodeType == System.Linq.Expressions.ExpressionType.MemberAccess) {
                MemberExpression memberExpressionPart = (MemberExpression)part;
                nameParts.Push(memberExpressionPart.Member.Name);
                part = memberExpressionPart.Expression;
            }
            else {
                //arghhhh... [index] != MemberAccess :(
                break;
            }
        }

解决方案

The ability of the expression-based helpers to understand indexes isn't in the product yet. It will be in the next preview release (whatever comes after MVC 2 RC). See http://aspnet.codeplex.com/WorkItem/View.aspx?WorkItemId=4970.

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