Convert from list to string in C#

Question

Before that I try to ask, i searched through the net but could not find what I am looking for.

I am trying to convert the field_values into string in C#.

type of fields_value :

public List<List<string>> field_values { get; set; }

this is my code that I want to modify it to do my work.

string x = pi.field_values[0];

I tried to do it with code below that does not work.

string x=convert.tostring(pi.field_values[0]);

any idea?

Please provide a sample of data and the desired result. At least I don't understand what you are trying to achieve exactly. — Styxxy
– Styxxy, Commented Feb 7, 2014 at 11:13
And convert how? You have a list of lists of strings. So with [0] you access the first list of strings, not a single string. — Ondrej Tucny
– Ondrej Tucny, Commented Feb 7, 2014 at 11:13
in following json format,I want to retrieve the id and then compare it with an string { "context": "65071", "names": [ "id", "name", "hash", "score", "rank" ], "values": [ [ "187126", "187126", "187126", "0.1", "92.7157" ], [ "494579", "494579", "494579", "0.05", "77.6358" ], [ "455577", "455577", "455577", "0.0488174", "76.4856" ]... — user3280040
– user3280040, Commented Feb 7, 2014 at 11:23

Tim Schmelter · Accepted Answer · 2014-02-07 11:13:54Z

5

field_values[0] is a List<string> not a string.

List<string> firstFieldValues = p.field_values[0];

You could for example use String.Join to concat multiple strings:

string allValues = string.Join(",", firstFieldValues);

answered Feb 7, 2014 at 11:13

Tim Schmelter

462k79 gold badges718 silver badges980 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

andi · Accepted Answer · 2014-02-07 11:35:47Z

0

field_values[0] is a List<string> ... so you have to go through those lists and save them in a string:

string allStrings = "";
foreach (var li in field_values){
    foreach (var str in li){
        allStrings += str;
    }
}

Then you'll have all fields in one long string.

answered Feb 7, 2014 at 11:35

andi

475 bronze badges

w.b · Accepted Answer · 2014-02-08 07:17:21Z

0

To get strings from the first list:

var str = field_values.ElementAt(0).Aggregate((aggr, next) => aggr + ", " + next);

or from all lists:

var allStr = field_values.SelectMany(l => l).Aggregate((aggr, next) => aggr + ", " + next);

answered Feb 7, 2014 at 11:21

w.b

11.3k5 gold badges32 silver badges49 bronze badges