C# how can I list the files in the folder in listview?

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I want to list the files in the folder in listview

I tried this code

DirectoryInfo di = new DirectoryInfo(@"C:\Users\Yusuf\Desktop\excel");
Dosyalar = di.GetFiles("*.csv");

ListViewItem item = new ListViewItem();

foreach (FileInfo file in Dosyalar)
{
    for (int i = 1; i < Dosyalar.Length; i++)
    {
        item.SubItems.Add(file.Name);
        item.Text = i.ToString();
        listView2.Items.Add(item);
    }
}

I'm getting result like this

1 mytest.csv
2 mytest.csv
3 mytest.csv
1 mytest1.csv
2 mytest1.csv
3 mytest1.csv
1 mytest2.csv
2 mytest2.csv
3 mytest2.csv

I want to get result like this

1 mytest.csv
2 mytest1.csv
3 mytest2.csv

What I have tried:

foreach (FileInfo file in Dosyalar)
{
    ListViewItem item = new ListViewItem();
    for (int i = 1; i < Dosyalar.Length; i++)
    {
        item.SubItems.Add(file.Name);
        item.Text = i.ToString();
        listView2.Items.Add(item);
    }
}

ListViewItem item = new ListViewItem();
foreach (FileInfo file in Dosyalar)
    {
        item.SubItems.Add(file.Name);
    }

for (int i = 1; i < Dosyalar.Length; i++)
    {
        
        item.Text = i.ToString();
        
    }
        listView2.Items.Add(item);

Posted 17-May-22 10:38am

YusufA0

Updated 17-May-22 11:24am

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2 solutions

Solution 1

You need to create a new item each time round the loop when you add it - otherwise, you just overwrite the single existing instance and that won't work, as you have seen...

Posted 17-May-22 11:22am

OriginalGriff

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Chris Copeland · Accepted Answer · 2022-05-17T11:24:00

I can see two immediate problems with your code:

You're looping over the file array twice
You're not creating a new ListViewItem each time you add it to the list

C#

foreach (FileInfo file in Dosyalar) // <-- looping over the 3 items here
{
    ListViewItem item = new ListViewItem();
    for (int i = 1; i < Dosyalar.Length; i++) // <-- looping over the 3 items again here
    {

You don't even need to reference Dosyalar.Length, you can instead just use an index variable to track the current item:

C#

int index = 1;

foreach (FileInfo file in Dosyalar)
{
  ListViewItem item = new ListViewItem();
  item.Text = index.ToString();
  item.SubItems.Add(file.Name);
  listView2.Items.Add(item);

  index++;
}