Dictionary<祝辞.ContainsKey给出RuntimeBinderException

本文关键字：给出 RuntimeBinderException ContainsKey 祝辞 Dictionary | 更新日期: 2023-09-27 18:15:53

在.cshtml中，我想检查是否存在一个键在Directory<int, Object>中，但我总是得到一个错误，找不到原因。

这是我的代码:

@foreach (KeyValuePair<int, int> weekAndYear in @ViewBag.WeekAndYears)
{
    int key = int.Parse(weekAndYear.Value + "" + weekAndYear.Key);
    bool exist = ViewBag.Menus.ContainsKey(key);
}

我得到的错误:

The best overloaded method match for System.Collections.Generic.Dictionary<int,Object>.this[int] has some invalid arguments

当我只使用。key或。value时，它仍然有效。

编辑-解决方案

问题是什么，我不知道，但我已经用下面的代码解决了这个问题:

foreach (KeyValuePair<int, int> weekAndYear in @ViewBag.WeekAndYears)
    {
        int key = int.Parse(weekAndYear.Value + "" + weekAndYear.Key);
        bool exist = ((Dictionary<int, Object>)ViewBag.Menus).ContainsKey(key);
}

Dictionary<祝辞.ContainsKey给出RuntimeBinderException

你可以尝试使用TryGetValue而不是ContainsKey，看看它是否有效:

@foreach (KeyValuePair<int, int> weekAndYear in @ViewBag.WeekAndYears)
{
    int key = int.Parse(weekAndYear.Value + "" + weekAndYear.Key); 
    Object outValue;
    bool exist = Menus.TryGetValue(key, out outValue);
}

问题是什么，我不知道，但我已经用以下代码解决了问题:

foreach (KeyValuePair<int, int> weekAndYear in @ViewBag.WeekAndYears)
    {
        int key = int.Parse(weekAndYear.Value + "" + weekAndYear.Key);
        bool exist = ((Dictionary<int, Object>)ViewBag.Menus).ContainsKey(key);
}
相关文章：