c# getting selected value from list box

[semomaniz]

I have a list box that has a list of roles defined. List of roles are binded to the list box in page load event. I am trying to retrieve the selected role from the text box but i am getting a null reference error even though one of the item is selected. below is the code that gives me null reference.

 String role = lstRole.SelectedItem.ToString(); 

 Label1.Text = role;

I even tried using the code below and all i get is null value. seems like it not selecting any thing form the list box.

String role = lstRole.SelectedValue;

Does any one have any idea what is going on??

Thanks in advance.

[harshmaul]

hi,
please show me how you are binding the data to the list.
A common problem i have is that on the page load it binds the data again therefore clearing the selection i made.

[kunal pawar]

Please used property
selectedItem.Text for text and SelectedItem.value for getting values

[semomaniz]

if (!Roles.IsUserInRole(User.Identity.Name, "Admin"))
            {
                btnSubmit.Enabled = false;
                btnclear.Enabled = false;
                lblerr.Text = " You donot have permission to create accounts ";
 
            }
            else
            {
 
                lstRole.DataSource = Roles.GetAllRoles();
                lstRole.DataBind();
            }
 

This is how i am binding the data to the list box. I tried using

 Label1.text = lstRole.SelectedItem.Text

it still gives me null reference exception.

[semomaniz]

got the problem solved. I forgot to check for post back. That was the reason why the value selected was being lost . Thank you for all your help.

cheers!!!!!!!!!!!!