Ndtyjky

Basically I'm trying to make a quiz application (multiplechoice questions) and I want to calulate the total number of correct answers based on the data value from the database.
So I've used Listbox inside a repeater to show the choices which looks like the following:

            <asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="Repeater1_ItemDataBound">                

            <ItemTemplate>

              Q-<%# Eval("Question_Text") %><br />



                <asp:ListBox ID="ListBox1" runat="server" CssClass="listboxCSS"></asp:ListBox><br /> <br />

            </ItemTemplate>

        </asp:Repeater>

and the C# code look like this:

    protected void Page_Load(object sender, EventArgs e)

{

    if (!Page.IsPostBack)

    {

        SqlCalss Obj = new SqlCalss();

        Repeater1.DataSource = Obj.ExecuteCmdSelect("SELECT * from Questions where ExamId=1");

        Repeater1.DataBind();

    }

protected void Repeater1_ItemDataBound(object source, RepeaterItemEventArgs e)

{



    string choice = DataBinder.Eval(e.Item.DataItem, "Question_Id").ToString();

    SqlCalss Obj = new SqlCalss();

    DataSet Ds = new DataSet();

    Ds = Obj.ExecuteCmdSelect("SELECT * from Choices where QuestionId="+choice);



    ListBox ListBox1 = (ListBox) (e.Item.FindControl("ListBox1"));

    ListBox1.DataSource = Ds;

    ListBox1.DataTextField = "Choice_Text";

    ListBox1.DataValueField = "Answer";

    ListBox1.DataBind();}

The code works good, it show multiple question ( it depends on the quiz) with multiple choices for each question shown in a Listbox.
now for each question,the DataValueField can have only one of two values( 0 = wrong , 1= correct ). In addition the total number of questions is different from one survey to another so I don't know how many Listboxes are there.

How can Add a button that Calculate all the selected datavalues to show the total correct answers ?
I tried this code:

   int x = Repeater1.Controls.Count(x => x.DataValueField == 1);

and this

int numCorrect = Repeater1.Items.Count(x => x.DataValueField == 1);

Edit:

When I run the web page, for example a quiz that has two questions ( each question has four choices in listbox )
I found that when I view the source of the web page it creates two listboxes with the same name like this:

                    <select size="4" name="Repeater1$ctl00$ListBox1" id="Repeater1_ListBox1_0" class="listboxCSS">

....

                    <select size="4" name="Repeater1$ctl01$ListBox1" id="Repeater1_ListBox1_1" class="listboxCSS">

and I figured out how to get the value of the first one using code like this:

  ListBox ListBox1 = (ListBox)this.FindControl("Repeater1$ctl00$ListBox1");

  Response.Write(ListBox1.SelectedValue.ToString());

Is there anyway that I can get the all values of listboxes that has same name?

Thank you so much in advance.

Thank you all!
I just found the answer of my problem which is getting by getting all the listboxes in web page using the following code:

    private void GetControlList<T>(ControlCollection controlCollection, List<T> resultCollection)

where T : Control

    {

        foreach (Control control in controlCollection)

        {

            //if (control.GetType() == typeof(T))

            if (control is T) // This is cleaner

                resultCollection.Add((T)control);



            if (control.HasControls())

                GetControlList(control.Controls, resultCollection);

        }

    }

Then I can get the values using the following:

   int s=0;

List<ListBox> allControls = new List<ListBox>();

        GetControlList<ListBox>(Page.Controls, allControls);

foreach (var childControl in allControls)

        {

            s +=  Int32.Parse( childControl.SelectedValue);

        }