ASP.NET: Listbox datasource and databind

Question

I have an empty listbox on .aspx page

lstbx_confiredLevel1List

I am generating two lists programatically

List         


        

Answer 1

Why don't you use the same collection as DataSource? It just needs to have two properties for the key and the value. You could f.e. use a Dictionary:

var entries = new Dictionary();
// fill it here
lstbx_confiredLevel1List.DataSource = entries;
lstbx_confiredLevel1List.DataTextField = "Value";
lstbx_confiredLevel1List.DataValueField = "Key";
lstbx_confiredLevel1List.DataBind();

You can also use an anonymous type or a custom class.

Assuming that you have already these lists and you need to use them as DataSource. You could create a Dictionary on the fly:

Dictionary dataSource = l1ListText
           .Zip(l1ListValue, (lText, lValue) => new { lText, lValue })
           .ToDictionary(x => x.lValue, x => x.lText);
lstbx_confiredLevel1List.DataSource = dataSource;