Get ListView Selected Item

Question

Hey guys a small help needed here

Actually i have a listView which contain some values, such as 

A

B

C

D

E

 

and i am currently retrieving its text using

listView1.SelectedItems[0].Text;  and Display a message that this is selected item

again when i select next item i get error

 

InvalidArgument=Value of '0' is not valid for 'index'.

Parameter name: index

 

How to solve this

 

Answer 1

Hi

 

Probably you are trying to access SelectedItems[0] when there are no selectedItems exists,

You should have a check on SelectedItems count like 

if(listView1.SelectedItems.Count > 0)
{
 var txt =  listView1.SelectedItems[0].Text;
}

 

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Answer 2

Kris444, initially count is >0 hence i got A as Answer in mesagebox.

after clicking ok, if i select B i get error

 

Answer 3

Hi 

 

You can use a loop to loop all the item selected

foreach (ListViewItem listv inthis.listView.Items)
{
  // urtreatment and you can test in every item select in the loop
}

hope it helps

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Best Regards...Please mark as answer if my post is helpful

Answer 4

This situation happens when you have one value selected, and you select a different item.

The selectedindexchanged event works like this:

1. DEdelect the previous item

2. Call the SelectedIndexChangedEvent

3. SELECTS new item.

4. Call the SelectedIndexChangedEvent.

As you can see, when you change the item being selected, the SelectedIndexChanged fires twice.

Now, when stage 1 fires, then there is really no selected item in the listview, count = 0,

therefor there is no index to work with.

 

The solutuion is to check if there are any selected items before using the index.

 

Noam B.

 

 

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Answer 5

How do you want (actually where) to retreive selected item? On a listView click or on some button click?

And do you select only one row in listView?

you can try with:

foreach (ListViewItem item in lvFiles.SelectedItems)
{
   string textIn1stColumn = item.Text;
   stirng textIn2ndColumn = item.Subitems[1].Text;
   //and so on for coumns (change the index of subitems)
}

 

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Mitja

Answer 6

Hi

Which event you are writing this code? SelectedIndexChanged?

probably you are trying to hit the code before selecting new node?

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Answer 7

Got it super

 Noam B, it worked thanks. for explaining the logic

thank you  Kris444

thank you Mitja Nonca

Thank you Yosrj

 

 

Answer 8

Kris444, initially count is >0 hence i got A as Answer in mesagebox.

after clicking ok, if i select B i get error

 Khris`s code works 100%. You just dont do it right - Im sure.

The only small glitch is maybe (especially if you show newly selected item in the messageBox) that when mesageBox appears, the newly selected item is not yet selected (visualy). But as soon as you press any button on the mesageBox, item gets selected. 

But there for sure is not errors in the code - at least if you do it right.

Check out this whole code, how you should do it:

    public Form1()
    {
      InitializeComponent();
      listView1.Columns.Add("col1", 100, HorizontalAlignment.Left);
      listView1.Columns.Add("col2", -2, HorizontalAlignment.Center);
      listView1.View = View.Details;
      listView1.FullRowSelect = true;
    
      //some example listView population:
      for (int i = 1; i < 6; i++)
      {
        ListViewItem lvi = new ListViewItem();
        lvi.Text = i.ToString();
        lvi.SubItems.Add("item " + i);
        listView1.Items.Add(lvi);
      }

      listView1.SelectedIndexChanged += new EventHandler(listView1_SelectedIndexChanged);
    }

    private void listView1_SelectedIndexChanged(object sender, EventArgs e)
    {
      if (listView1.SelectedItems.Count > 0)
      {
        MessageBox.Show(listView1.SelectedItems[0].SubItems[1].Text);
      }
    }

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Mitja