Adding counted items to a listbox from another listbox

Question

Hi - I have a listbox called lbox_Products. - Next to this box I have a button btn_AddProduct. - I have another listbox called lbox_SelectedProducts When I select an item in my lbox_Products and I click on the btn_AddProduct the selected item from the first lbox_Products is put in the other lbox_SelectedProducts. This happens like this: private void btn_AddProduct_Click(object sender RoutedEventArgs e) { lbox_SelectedProducts.Items.Add(lbox_Products.SelectedItem); } This works fine but what I want to do is have a single line for each product in lbox_SelectedProducts preceeded by the number of times that it has been added. For example: 1 phone 3 displays 6 computers 2 speakersets ... How can I do this...?

Sam Hobbs · Answer

I suggest using a ListView or DataGridView instead of the other ListBox. I suggest creating a class that has item name and quantity and it can have other items too. You can create an object data source from that class. Then you can bind that data source to the other control then when you need to add items to or change items in the other control you would just add to the data source's collection or change the item in the collection. You could even use the same data source in both controls and use a filter to determine what items are shown in the other control. This all sounds complicated but once you know how to do it you can do it fior many other things and it is actually easier.

seenu B · Answer

1) would plz change the listbox selection mode in multiselect 2) follw the code listBox2.Items.Clear(); for ( int i = 0; i { listBox2.Items.Add(listBox1.SelectedItems[i].ToString()); }

Sam Hobbs · Answer

You will probably have questions about how to do it. Depending on the question it might be better to create a new thread. Start by creating a new file for the new class (Project | Add Class). After creating that go to the data sources (Data | Show Data Sources) and add a data source. In the first window select Object. In the second window select the class you created; you might need to expamnd some nodes of the treeview. Don't be surprised if you don't see your class; you will probably need to build the project first to get the class to be shown. Then in the data sources window with a form open in the designer you can click on the node for Products and change the control to use. This is confusing; you will understand better when you can actually do it. Change the control to listbox and then drag and drop the Product field to the form. That will create a listbox bound to the Product field. Then change the Product field back to the control that it had originally. Then drag and drop the class to the form which will create a DataGridView by default. The next thing to do is to set the filter for the DataGridView's data source and then put data into and get data from the data source.Let me know when you need that.

Kevin Brigitta · Answer

@Sam I will indeed try it do to it as you have indicated. Thanks for the responses! Greetz!

Pradeep Chandraker · Answer

I would suggest @Sam's idea to have grid. If you are using grid you have better handle edit or delete product kind of functionality if you ave any.

Dorababu Meka · Answer

Try this and change per your requirement by making some changes you will get the desired int cnt = 0; ArrayList lst = new ArrayList(); private void button1_Click(object sender EventArgs e) { string str = listBox1.SelectedItem.ToString(); lst.Add(str); if (lst.Contains(str)) { cnt++; str = cnt.ToString() + str; } if (!(listBox2.Items.Contains(str))) { listBox2.Items.Clear(); listBox2.Items.Add(str); } else { listBox2.Items.Add(str); } }

Vulpes · Answer

One way to do that is to use a Dictionary: private Dictionary dict = new Dictionary (); private void btn_AddProduct_Click(object sender RoutedEventArgs e) { string newItem = lbox_Products.SelectedItem.ToString(); if (dict.ContainsKey(newItem)) dict[newItem]++; else dict.Add(newItem 1); if (lbox_SelectedProducts.HasItems) lbox_SelectedProducts.Items.Clear(); foreach(string key in dict.Keys) { lbox_SelectedProducts.Items.Add(String.Format({0} {1} dict[key] key)); } }

Kevin Brigitta · Answer

It does indeed add a number in front of the item but the intension is to have 1 line per product preceeded with the number of times it has been selected. Also when I click a different product and add it to the lbox_SelectedProduct the 'number' keeps on incrementing...

Krishna Garad · Answer

Declare one static int variable at global level like static int no=1; now in button click event write button_click { lbox_SelectedProducts.Items.Add(no.ToString()+lbox_Products.SelectedItem); no++; } it will do what you want.