Question

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?

Answer 1

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).