C#: Get all selected items of CheckBoxList or ListBox in comma separated string

If you want to store selected value of a CheckBoxList or Listbox in comma separated string, then you are on right place. Sometime it is requirement that we want a comma separated string of selected value of CheckBoxList or Listbox control (I.e. to save your Control’s selected value in one String field of DB).

So here I am writing one small function which will take CheckBoxList or ListBox as parameter and return comma separated string of selected items.

Note: Please include System.Text and System.Web.UI.WebControls namespaces for this sample code.

//for Listbox:provide ListBox control. public string GetSelectedItems(CheckBoxList control) {     var items = new StringBuilder();     foreach (ListItem item in control.Items)     {         if (item.Selected)             items.Append(string.Format("{0},", item.Value));     }     //Remove last comma before returning back.     return items.ToString().TrimEnd(','); }

Use this function as:              

var selectedValues = GetSelectedItems(control); //control is name of Checkboxlist/ListBox

In my next post I will demonstrate how you can populate selected value for CheckBoxList or Listbox from comma separated string.