将字典列表转换为字符串，反之亦然

Question

I have a list of dictionaries as List< Dictionary< String,int>> which I have to convert to string and then convert back to the same format List< Dictionary< String,int>>. I tried using

string ratio = string.Join("$", order);

It converts to string but I am unable to retrieve the dictionary back from string value using but it gives an error that it cannot convert from string[] to dictionary.

List<String> convertStringToList = new List<Dictionary<String,String>(ratios.Split('$'));

Answer 1

This is the most concise way I can think of:

Updated Start

List<Dictionary<string, string>> convertStringToList= new   List<Dictionary<string, string>>()
List<string> strList = new List<string>();
Foreach(var dic in convertStringToList)
{
  string result = string.Join(", ", dic.Select(m => m.Key + ":" + m.Value).ToArray());
  strList.add(result);
}

Updated End

However, depending on your circumstances, this might be faster (although not very elegant):

Foreach(var dic in convertStringToList)
    {
      string result = dic.Aggregate(new StringBuilder(),
        (a, b) => a.Append(", ").Append(b.Key).Append(":").Append(b.Value),
        (a) => a.Remove(0, 2).ToString());
      strList.add(result);
    }

Reference:

Hope it Helps.

Answer 2

You can try with below snippet.

string ratio = string.Join("$", data);

var convertStringToList  = ratio.Split(new[] {'$'}, StringSplitOptions.RemoveEmptyEntries)
           .Select(part => part.Split(','))
            .ToDictionary(split => split[0].Trim('['), split => split[1].Trim(']'));

Answer 3

I would recommend @Zaheer 's answer, but if you can't change the code, you can use the code:

var list = new List<KeyValuePair<string, string>>(string.Join("$", dict).Split('$')
     .Select(x => 
          new KeyValuePair<String, String>(
              x.Substring(1, x.IndexOf(',')),
              x.Substring(x.IndexOf(',')+1, x.Length-x.IndexOf(',')-2))));

The format of string.Join('$', order) will be [key, value]$[key, value].....