ListView Fundamentals :: C#

[kuphryn]

Hi.

I have some fundamental questions on the listview.

1) I added a listview with some columns, however, the column titles do not appear. The columns are there, but they do not appear. Is there a setting in winform that can hide it?

2) How do you search for an item in the listview?

3) How do you set the text of a specific item in a listview? For example, I want to set the text of item 2 column 1.

Thanks,
Kuphryn

[Anders Jansson]

I might have the answer for your first question,

ColumnHeader header1 = this.listviewInstances.Columns.Add("C1", 10, HorizontalAlignment.Center);
ColumnHeader header2 = this.listviewInstances.Columns.Add("C2", 10, HorizontalAlignment.Center);
ColumnHeader header3 = this.listviewInstances.Columns.Add("C3", 10, HorizontalAlignment.Center );
ColumnHeader header4 = this.listviewInstances.Columns.Add("C4", 10, HorizontalAlignment.Center );

Hope it helps

/Anders

[MartinL]

2.) If you need to search for item based on its name, you have to iterate through list view item collection to find some item.

ListViewItem lvi = null;
string strYourText = "some text";

foreach (ListViewItem _lvi in this.listYourList.Items)
{
    if (_lvi.Text == strYourText)
    {
        lvi = _lvi;
        break;
    }
}

if (lvi != null)
{
    // We found it... lvi is the proper ListViewItem 
}

If you need to search alse the subitems, you need to make this searching also on the _lvi.SubItems collection...

3.)

public void SetListItemText(ListView list, int iItemIndex, int iSubItemIndex, string strNewText)
{
    if (list == null)
        return;

    if (iItemIndex < 0 || iItemIndex >= list.Items.Count)
        throw new ArgumentOutOfRangeException("iItemIndex", "Parameter is out of range");

    ListViewItem lvi = list.Items[iItemIndex];
    if (lvi == null)
       return;

    if (iSubItemIndex < 0 || iSubItemIndex >= lvi.SubItems.Count)
        throw new ArgumentOutOfRangeException("iSubItemIndex", "Parameter is out of range");

    ListViewItem lviSubItem = lvi.SubItems[iSubItemIndex];
    if (lviSubItem != null)
        lviSubItem.Text = strNewText;
}

Martin

[MartinL]

Additionally, call

this.listviewInstances.Columns.Clear();

before you write the code posted by Anders Jansson...

Martin

[kuphryn]

Okay. Thanks.

Kuphryn