how to filter records from listbox without using sql stateme

Question

i want to filter items from listbox as some character typed in combobox ??

suppose when i type "M" in combobox then listbox filter its itemlist which contains

"M" in C# without using SQL STATEMENT...

 

below is my code.....

 

 

private void FillListBoxes()

{

int count = FillList.Rows.Count;

for (int k = 1; k <= count; k++)

{

var itemList = lbSearch.Items.Cast<String>().ToList();

if (count > 0)

{

lbSearch.Items.Clear();

//filtertheitemsandaddthemtothelist

lbSearch.Items.AddRange(itemList.Where(i => i.Contains(cStockTypeName.Text)).ToArray());

lbSearch.Items.Add(FillList.Rows[k]["CatName"].ToString());

}

}