How to populate check boxes based on selected drop down list

Question

i'm developing a system of car repairing so i have class for cars and class for parts the for particular car they have relationship, so when i select car from drop down list i want to display parts of the selected car as checkboxes .

Manas Mohapatra · Answer

In ASPX: carList  runat=server AutoPostBack=True onselectedindexchanged =itemSelected> PnlControl  runat = server> In CodeBehind: protected void itemSelected(object sender EventArgs e) { CheckBox chkList1; // Connect to DB and fetch all parts as per Cars by using carListList.SelectedItem.Value in your query // Loop over all records from DB and change as per your requirement. for(int intControlIndex=0;intControlIndex=5;intControlIndex++) { chkList1 =new CheckBox(); chkList1.Text = strCheckboxText; chkList1.ID = Chk+intControlIndex; chkList1.Font.Name = Verdana; chkList1.Font.Size = 9; PnlControl.Controls.Add(chkList1); } } Note: Here I did it for demo code and you have to change as per your need. Find my comments and implement as you need. Any issue put error details here.