运营商＆= 39; ==＆＃39;不能应用于＆＃39; string＆＃39;类型的操作数和＆＃39; System.Collections.Generic.List <string>＆＃39;

Question

根据给定的行列表

帮助我从词典中获取项目

List<string> conversionTypeNames = Conversion1List
  .Select(k => k.ConversionTypeName)
  .Distinct()
  .ToList();

var query = new GoogleAdWordsData_Dictionaries_Query();
var ConversionsDict = query.GetConversionDictionary(ClientID);

ConversionsDict = ConversionsDict
  .Where(k => k.ConversionTypeName == conversionTypeNames);

Answer 1

所以我想你想做的是检查转换类型名称中是否存在k.ConversionTypeName，使用此语法

    ConversionsDict = ConversionsDict.Where(k => conversionTypeNames.Contains(k.ConversionTypeName));

Answer 2

我找到了正确的解决方案！

var new_Dict = ConversionsDict.Where(p => p.ConversionTypeName != null && !Conversion1List.Exists(a => a.ConversionTypeName == p.ConversionTypeName)).Distinct().ToList();

Answer 3

在这里创建一个列表。

List<string> conversionTypeNames = Conversion1List
  .Select(k => k.ConversionTypeName)
  .Distinct()
  .ToList();

请尝试按照代码提取列表

foreach (var s in conversionTypeNames)
{
      ConversionsDict = ConversionsDict
     .Where(k => k.ConversionTypeName == s);    
}