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how to add entry for url value and it's description to add it to a list box

Posted on 2006-11-13
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Last Modified: 2010-04-16
Hi,
I need sample example for adding , updating and deleting entries for a list box
please help as soon as possible

Regards
Hatem
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Question by:shang3000
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ozymandias earned 500 total points
ID: 17928747
AFAIK, You can't do this with a list box.
You need to use a list view or a data grid
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LVL 15

Expert Comment

by:ozymandias
ID: 17928772
Example :

this.listView1.View = View.Details;
this.listView1.Columns.Add("URL",(this.listView1.Width/2)-10,HorizontalAlignment.Left);
this.listView1.Columns.Add("Description",(this.listView1.Width/2)-10,HorizontalAlignment.Left);
this.listView1.Items.Add(new ListViewItem(new string[]{"www.google.com","The Google search engine"}));
this.listView1.Items.Add(new ListViewItem(new string[]{"www.yahoo.com","The Yahoo search engine"}));
this.listView1.Items.Add(new ListViewItem(new string[]{"www.dogpile.com","The DogPile search engine"}));
this.listView1.Items.Add(new ListViewItem(new string[]{"www.msn.com","The MSN search engine"}));

To Edit :

this.listView1.Items[0].SubItems[0].Text = "New text first column of item 1";

To Delete :

this.listView1.Items.RemoveAt(1);

Removes the item at the index position of 1.
0
 

Author Comment

by:shang3000
ID: 17929082
Hi,
Thanks for your effort  but  how can get the index of the selected Item on the list view so that I can modify or detete it

your help is highly appriciated and it's very important to me so please reply as soon as possible
Regards
Hatem :-)
0
 
LVL 15

Expert Comment

by:ozymandias
ID: 17929099
You can get the selected items in the listview directly or by index :

int[] indices  = this.listView1.SelectedIndices;

or

SelectedListViewItemCollection c = this.listView1.SelectedItems;

If the listview only allows single item collection then you can just get the item at 0 in eitehr collection;

int index = this.listView1.SelectedIndices[0];

or

ListViewItem item =  this.listView1.SelectedItems[0];

If multiple selection is allowed and the collection contains more than one item or index then you have to decide what to do.

this.listView1.Items.Remove(this.listView1.SelectedItems[0]); // will remove the currently selected item in the list.

this.listView1.SelectedItems[0].SubItems[0].Text = "new value"; // will set the text of first column for the selected item to "new value"
0
 
LVL 15

Expert Comment

by:ozymandias
ID: 17929106
The listview can have no item selected so both this.listView1.SelectedItems and this.listView1.SelectedIndices can be empty collections and this.listView1.SelectedIndices[0] and  this.listView1.SelectedItems[0] can be null.
If you want to avoid null reference exceptions check for nulls first.
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