CODEWITHSUNDEEP
c#asp.netarrayslistarraylist
MrM
MrM

Reputation: 21999

Adding a multiple elements from a List to an array

I have a list with multiple variables and would like to add to an array the write to a text file. 

class DataFields
{
     public string name{get;set;}
     public int id{get;set;}
     public int age{get;set;}
}

List<DataFields> dfList;

would look something like

Adam 1234 23
Pete 3841 15
Scot 8435 30

DataFields[] result = dfList.ToArray();
File.WriteAllLines(@"C:\File\TextFile.txt", result);

I would like the result to be displayed in the text file similar to the list above but I am having trouble adding the list to the array then display in that order. Any ideas?

Upvotes: 1

Views: 524

Answers (3)

Rahul R.
Rahul R.

Reputation: 6461

you could do something like this too.. 

List<DataFields> dfList = new List<DataFields>();
    // populate dfList here
    StreamWriter sw = new StreamWriter(@"C:\File\TextFile.txt");

            foreach (DataFields df in dfList)
            {
                sw.WriteLine(df.id+"\t"+df.name+"\t"+df.age);
            }

            sw.Close();

or simply use foreach of List which is more efficient.

dfList.ForEach(df=> sw.WriteLine(df.id + "\t" + df.name + "\t" + df.age));

Upvotes: 0

empi
empi

Reputation: 15881

var result = dfList.Select(df => String.Format("{0}\t{1}\t{2}", df.name, df.id, df.age);

Upvotes: 3

devdigital
devdigital

Reputation: 34349

File.WriteAllLines wants a collection of strings. You can generate one using LINQ:

List<DataFields> dfList = new List<DataFields>();
// populate dfList here

var formattedData = 
     dfList
        .OrderBy(df => df.Name)
        .Select(df => string.Format("{0} {1} {2}", df.Name, df.Id, df.Age));

File.WriteAllLines(@"C:\File\TextFile.txt", formattedData);

You should use PascalCase for your property names (Name, Id, Age).

Upvotes: 8

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