遍历字典 c# 中的值列表

Question

I have a dictionary defined as below ,

Dictionary<string, List<string>> dictionaryValues = new Dictionary<string, List<string>>();

Since I have a List of values I want iterate through them and find out what values have ="true" in them Here is the source code what I have tried thus far

Would appreciate any help on this

List<string> listValues = new List<string>();

listValues.Add("value=true");

listValues.Add("value=false");

dictionaryValues.Add("Name", listValues);

            foreach (var item in dictionaryValues)
            {
                foreach (var item in item.Value)
                {
                    if (item.Contains("true"))
                    {

                    }
                }
            }

Answer 1

You can use the Values property on the dictionary. Also, you'll have to rename one of the "item" variables in either of the foreach loops.

See also msdn here .

foreach (List<string> items in dictionaryValues.Values)
{
  foreach (string item in items)
  {
     if (item.Contains("true"))
     {
     }
  }
}

I've also made it explicit what types the "items" and "item" are for clarity.

Answer 2

通过使用 Linq，您可以使用 SelectMany 和 Where 执行此操作：

 var valuesWithTrue =  dictionaryValues.Values.SelectMany(x => x).Where(x => x.Contains("true"));