Editing values in List?

Member 10441939

Hy @ everyone, i have a Little Problem:

class Track
{
string Name;
string Artist;
string Album;
int SampleRate;
int BitRate;

public Track(string name, string artist, string album, int sampleRate, int bitRate)
{
    Name = name;
    Artist = artist;
    Album = album;
    SampleRate = sampleRate;
    BitRate = bitRate;
}

}

Now i want to editing some values foreach Track:

List TracksOniTunes = new List();

foreach (Track item in TracksOniTunes)
{
// SampleRate = 0

}

Later, i have a Switch and I need depending on different values to compare from the List

switch (criteria)
{
case "":
break;
case "Qualität":
break;
case "Album":
break;
case "Compilation":
break;
}

My Problem is that i can't editing some items? I can not access the objects. Is there an easy way? Thanks for help.

Lost User

Simple. In the line:

List<Track> TracksOniTunes = new List<Track>();

You are creating a brand new empty List. So when you get to

foreach (Track item in TracksOniTunes)

there is nothing in your list. You have to put something in your list before you can change its properties.

pradeep surya

Just Add some items to the list TracksOniTunes. Then u can edit the inner values.

Member 10441939

Sorry, here is the line that add a Track to the list

for (int countForTrack = countTracks; countForTrack > 0; countForTrack--)
{
currentTrack = tracks[countTracks] as IITFileOrCDTrack;
countTracks--;
TracksOniTunes.Add(new Track(currentTrack.Name, currentTrack.Artist, currentTrack.Album, currentTrack.SampleRate, currentTrack.BitRate));
}

BillWoodruff

Member 10441939 wrote:

My Problem is that i can't editing some items?
I can not access the objects.

What specific error message do you get, and where in the code does the error occur ? I note in your second reply you do not use the for-loop index count variable to access the current Track, but instead use and decrement another variable: this is not an error, but, why not use the for-loop index variable ?

“I speak in a poem of the ancient food of heroes: humiliation, unhappiness, discord. Those things are given to us to transform, so that we may make from the miserable circumstances of our lives things that are eternal, or aspire to be so.” Jorge Luis Borges

Lost User

Okay... since you say that there are actually items in your List, the problem becomes more clear. In your foreach you need to say

item.SampleRate = 0;

But to get to the variables, you either need to make your class level variables public or create public properties for your class exposing those variables to outside that class.

Emre Ataseven

Change your fields to auto-properties like that;

public string Name { get; set; }
public string Artist{ get; set; }
public string Album { get; set; }

Tim Toady Bicarbonate