希望比较拆分的字符串[]，如果它存在于List<KeyValuePair<string，string>>myList

Question

我希望比较string[] splitted，如果它存在于List<KeyValuePair<string, string>> myList中。如果没有，那么我会把它添加到List<string>作为一个单独的电子邮件地址列表。

使用LINQ可能是一个不错的选择，请帮助实现。

查看string[] splitted是否存在于List<KeyValuePair<string, string>> myList

  public void SendEmails(String esmails)
{
  //splitting email string 
  string[] splitted = esmails.Emails.Split(new string[] { System.Environment.NewLine },     StringSplitOptions.RemoveEmptyEntries);
  List<KeyValuePair<string, string>> myList = new List<KeyValuePair<string, string>>();
  foreach (var email in GetEmails)
  {
    for (int i = 0; i < splitted.Count(); i++)
    {
      if (email.EmailAddress.Equals(splitted[i].Replace(";","")))
          myList.Add(new KeyValuePair<string, string>(email.IdentificationNo, email.EmailAddress));
    }
  }

}

Answer 1

尽可能使用隐式类型变量(var)

可以通过使用join

来实现。

public void SendEmails(String esmails)
{
    //splitting email string 
    var splitted = 
        esmails.Split(new []{System.Environment.NewLine}, StringSplitOptions.RemoveEmptyEntries)
        .Select(s => s.Replace(";", ""));
    var matchings = 
            from s in splitted
            join email in GetEmails on email.EmailAddress equals s
            select new KeyValuePair<string, string>(email.IdentificationNo, email.EmailAddress);
    var myList = matchings.ToList();
}

Answer 2

public void SendEmails(String esmails)
{
    List<String> split = esmails.Split(new String[] { System.Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries).Select(s => s.Replace(";", "")).ToList();
Dictionary<Int32, String> dictionary = new Dictionary<Int32, String>();
foreach (Email email in GetEmails())
{
    foreach (String address in split)
    {
        if (email.EmailAddress.Equals(address))
            dictionary[email.IdentificationNo] = email.EmailAddress;
    }

}