add listbox value and text to 2D array

Question

I have two listboxes and i am adding listbox1 items to listbox2.
listbox 1 items are loaded from database. so i wanted to store listbox1 value and text to 2D array. how to do that please anyone help me

Vulpes · Answer

Well, if ListBox1 is data-bound and you want to manipulate its items collection, then the first thing you need to do is to remove the data-binding and then reload it from the array. // load the array from ListBox1 int count = ListBox1.Items.Count; string[,] vta = new string[2, count]; for(int i = 0; i { vta[0,i] = ListBox1.Items[i].Value; vta[1,i] = ListBox1.Items[i].Text; } ListBox1.DataSource = null; // remove data-binding // reload ListBox1 from array for(int i = 0; i { ListItem li = new ListItem(vta[1,i], vta[0,i]); ListBox1.Items.Add(li); } The code you'll need to exchange items between the listboxes will then be as follows: // from listbox1 to listbox2 // clear ListBox2 if necessary ListBox2.Items.Clear(); // add selected items from listbox1 to listbox2 // and remove them from listbox1 at the same time // need to iterate backwards though item collection to do this for(int i = ListBox1.Items.Count - 1; i >=0; i--) { ListItem li = ListBox1.Items[i]; if (li.Selected) { ListItem li2 = new ListItem(li.Text, li.Value); ListBox2.Items.Add(li2); ListBox1.Items.RemoveAt(i); } } // sort listbox2 items by Text property SortListBox(ListBox2); // from listbox2 to listbox1 // add selected items from listbox2 to listbox1 // and remove them from listbox2 at the same time // need to iterate backwards though item collection to do this for(int i = ListBox2.Items.Count - 1; i >=0; i--) { ListItem li2 = ListBox2.Items[i]; if (li2.Selected) { ListItem li = new ListItem(li2.Text, li2.Value); ListBox.Items.Add(li); ListBox2.Items.RemoveAt(i); } } // sort listbox1 items by Text property SortListBox(ListBox1); // code for Sort method using LINQ protected void SortListBox(ListBox lb) { var sorted = from ListItem li in lb.Items orderby li.Text select li; lb.Items.Clear(); lb.Items.AddRange(sorted.ToArray()); }

Vulpes · Answer

To add the contents of the array to ListBox2, you can do: int count = vta.GetLength(1); ListBox2.Items.Clear(); // if necessary for(int i = 0; i { ListItem li = new ListItem(vta[1,i], vta[0,i]); ListBox2.Items.Add(li); }

Vulpes · Answer

If I've understood it correctly, try this code: int count = ListBox1.Items.Count; string[,] vta = new string[2, count]; for(int i = 0; i { vta[0,i] = ListBox1.Items[i].Value; vta[1,i] = ListBox1.Items[i].Text; }

Vulpes · Answer

As a desktop developer, ASP.NET is not really my field either but is it something like this that you're trying to do? http://www.devcurry.com/2009/03/bind-arraylist-with-hyperlinks-to.html

jacob lee · Answer

Good job!I learn much from you.Now i have another question, how to bind arrays to GridView in asp.net ?I am not good at the filed of asp.net . I know that you can use exclamation sign to bind array of simple types (like string) to GridView like this: But this doesn't seem to be the case with DataNavigateUrlFields And I get following error: A field or property with the name '!' was not found on the selected data source. Can you help me?

samanta · Answer

Thank you sir i got the solution

samanta · Answer

i want to add selected items of listbox1 to listbox2. i am loading listbox1 items from darabase and its sorted by name. once i remove items from listbox2, all removed items must be added back to listbox1 and listbox1 must be sorted.

Vulpes · Answer

Just to be clear here, are you saying that you want to copy all listbox1's items to listbox2 (via the array) or only the selected items? If it's the latter, can more than one item be selected at once?

samanta · Answer

okay sir. once i added selected items from listbox1 to listbox2, selected listbox1 items must be removed. and once i removed items from listbox2 all removed items must be added to listbox1 with sorted order. how to do that.

samanta · Answer

thanks for your reply. okay that's correct and now i want to add this 2D array to another listbox. how can i do that please help me

add listbox value and text to 2D array

Answers (10)