Populate CheckBoxList from ListBox data and Vice Versa in ASP.Net

bigbear

SOLVED CLOSED ACTIVE ANSWERED
User: bigbear
Posted: on May 03, 2014 03:59 AM
Forum: Data Controls
Answer: 1
Views: 3261

hello all

i have been trying to solve this issue for over a month and i tried many different things

i want my shopping cart list box to have items in it then I save all of those items in a session variable. I pull that session out on my checkboxlist page and I want it to autocheck all the items that were in my previous listbox that are now in the session

I also want to to this the other way so I can check a new item in my checkboxlist and I want it to automatically put the item in the listbox The issues I have been getting is a ListItem error or a List<Product> Error it does not work no matter what ways I try it

Here is my code that I have tried

//LISTBOXES
<asp:ListBox runat="server" ID="AvailableProducts" Height="300px" Width="300px" SelectionMode="Multiple" ></asp:ListBox>
                        <br />
                        <asp:Button runat="server" ID="addProduct" Text=">>" Width="75px" OnClick="addProduct_Click1" />
                   </td>
                    <td style="width: 200px; text-align: center ">
                        <asp:Button ID="submitprods" runat="server" Text="Submit" OnClick="submitprods_Click" />
                    </td>
                    <td>
                         
                         <asp:ListBox runat="server" ID="ShoppingCart" Height="300px" Width="300px" SelectionMode="Multiple">
                        </asp:ListBox>
                        <br />
                        <asp:Button runat="server" ID="deleteProduct" Text="<<" Width="75px" OnClick="deleteProduct_Click1" />
//CHECKBOXLIST
<asp:CheckBoxList ID="CheckBoxList1" runat="server"  RepeatColumns="3" RepeatLayout="Table" RepeatDirection="Vertical" OnSelectedIndexChanged="CheckBoxList1_SelectedIndexChanged">
                        </asp:CheckBoxList>
//LISTBOXLIST ADD
protected void addProduct_Click1(object sender, EventArgs e)
    {
        if (Page.IsPostBack)
        {
            while (AvailableProducts.Items.Count > 0 && AvailableProducts.SelectedItem != null)
            {
                foreach (Product p in productList)
                {
                    if (Convert.ToString(p.ProductID) == AvailableProducts.SelectedValue)
                    {
                        // 
                        //total += Convert.ToDecimal( AvailableProducts.SelectedValue);
                        //Session.Add("shoppingcartTotal", total);

                        ((List<Product>)Session["Products"]).Add(p);
                    }
                }
                ListItem selected = AvailableProducts.SelectedItem;
                selected.Selected = false;
                total += Convert.ToDecimal(selected.Value);
                ShoppingCart.Items.Add(selected);
                AvailableProducts.Items.Remove(selected);

            }
            lbltotal.Text = total.ToString();

            //List<Product> shoppingCart = new List<Product>();
            //List<Product> shoppingCart = ((List<Product>)Session["Products"]);
            ////foreach (Product item in ShoppingCart.Items)
            //foreach (Product item in shoppingCart)
            //{
            //    shoppingCart.Add(item);
            //}
            List<ListItem> shoppingCart = new List<ListItem>();
            foreach (ListItem item in ShoppingCart.Items)
            {
                shoppingCart.Add(item);
            }
            Session["Products"] = shoppingCart;
            Session["shoppingcartTotal"] = total;
        }
//LISTBOX LIST DELETE
    protected void deleteProduct_Click1(object sender, EventArgs e)
    {
        if (IsPostBack)
        {
            while (ShoppingCart.Items.Count > 0 && ShoppingCart.SelectedItem != null)
            {       //Product
                foreach (Product p in productList)
                {
                    if (p.Name == ShoppingCart.SelectedValue)
                    {
                        //total -= p.Price;
                        ((List<Product>)Session["Products"]).Remove(p);
                        //((List<Product>)
                        //List<string> thePs = new List<string>();
                        //Session["Products"].Remove(p) = thePs;
                    }
                }
                ListItem li = ShoppingCart.SelectedItem;
                li.Selected = false;
                total -= Convert.ToDecimal(li.Value);
                AvailableProducts.Items.Add(li);
                ShoppingCart.Items.Remove(li);
            }
            lbltotal.Text = total.ToString();
            // Session["shoppingcartTotal"] = total;
            //STORE THE PRODUCTS IN A SESSION
            //ArrayList myProducts = new ArrayList();
            //List<Product> shoppingCart = new List<Product>();
            //foreach (Product item in ShoppingCart.Items)
            //{
            //    shoppingCart.Add(item);
            //}
            List<ListItem> shoppingCart = new List<ListItem>();
            foreach (ListItem item in ShoppingCart.Items)
            {
                shoppingCart.Add(item);
            }
            Session["Products"] = shoppingCart;
            Session["shoppingcartTotal"] = total;
        }
CHECKBOXLIST POPULATE
    private void PopulateShoppingCart()
    {
        if (Session["Products"] != null)
        {
            List<Product> cart = ((List<Product>)Session["Products"]);
            foreach (Product li in cart)
            {
                // CheckBoxList1.Items = true;
                CheckBoxList1.DataSource = cart;
                CheckBoxList1.Items.FindByValue(li.ProductName).Selected = true;
                CheckBoxList1.DataBind();
               // CheckBoxList1.Items.FindByValue(li.Name).Selected = true;

//THIS IS WHAT I TRIED IN LISTBOXLIST POPULATE SO MANY DIFFERENT OPTIONS I CANT GET IT WORKING…….
private void PopulateShoppingCart()
    {
        if (Session["Products"] != null)
        {
            //try
            //{            
            //List<Product> cart = ((List<Product>)Session["Products"]);
            //foreach (Product li in cart)
            //{
            //    ShoppingCart.Items.Add(li.Name);
            //}
            //}
            //catch (InvalidCastException) { }
        //    //switched List<ListItem> and List<Prodoct> interchanging to test
        //    //List<ListItem> li2 = (List<ListItem>)Session["Products"];
        //    shoppingCart = Session["Products"] as List<Product>;

        //    //if (Session["Products"] is List<Product>)
            
        //       // List<Product> cart = ((List<Product>)Session["Products"]);
        //    foreach (Product li in shoppingCart)
        //        {
        //            ListItem l = new ListItem(li.Name, li.Product_ID.ToString());
        //            ShoppingCart.Items.Add(l);
        //            //ShoppingCart.Items.FindByValue(li).Selected = true;
        //            //ShoppingCart.DataSource=cart;
        //            //shopping.DataBind();

        //        }            
        //    //********************************************************************************       
            //List<Product> cart = ((List<Product>)Session["Products"]);
            //foreach (Product li in cart)
            //{
            //    //ShoppingCart.Items.FindByValue(li.Value).Selected = true;
            //    ShoppingCart.Items.Add(li.Name);
            //}
            //
            //
            //{
            //    //ShoppingCart.Items.FindByValue(li.Value).Selected = true;
            //    
            //}
        }
        if (Session["shoppingcartTotal"] != null)
        {
            total = 0;
            total = (decimal)Session["shoppingcartTotal"];
            lbltotal.Text = total.ToString();
        }
        ////Session["Products"] = shoppingCart;
        ////lbltotal.Text = total.ToString();
    }

Download FREE API for Word, Excel and PDF in ASP.Net

Azim

0 3

Reply
ANSWER
User: Azim
Replied: on May 04, 2014 11:08 PM
Modified: on May 06, 2014 05:27 AM
Report

I have show you this example with dummy values in the CheckBoxList and ListBox

Default.apx

<asp:ListBox ID="lbItems" runat="server" OnSelectedIndexChanged="lbItems_OnSelectedIndexChanged"
    AutoPostBack="true">
    <asp:ListItem Text="PC" Value="PC" />
    <asp:ListItem Text="LapTop HP" Value="LapTop HP" />
    <asp:ListItem Text="DELL" Value="DELL" />
    <asp:ListItem Text="Key Board" Value="Key Board" />
</asp:ListBox>
<hr />
<asp:ListBox ID="lbSelected" runat="server"></asp:ListBox>
<br />
<asp:Button ID="Button1" Text="Next" runat="server" OnClick="Next" />

Default.aspx.cs

protected void Next(object sender, EventArgs e)
{
    List<ListItem> seletedItem = new List<ListItem>();
    foreach (ListItem item in this.lbSelected.Items)
    {
        seletedItem.Add(item);
    }
    Session["SeletedItem"] = seletedItem;
    Response.Redirect("~/Default2.aspx");
}

protected void lbItems_OnSelectedIndexChanged(object sender, EventArgs e)
{
    this.lbSelected.Items.Add(new ListItem(this.lbItems.SelectedItem.Value, this.lbItems.SelectedItem.Value));
}

Default2.aspx

<asp:CheckBoxList ID="chkSeletedItems" runat="server">
    <asp:ListItem Text="PC" Value="PC" />
    <asp:ListItem Text="LapTop HP" Value="LapTop HP" />
    <asp:ListItem Text="DELL" Value="DELL" />
    <asp:ListItem Text="Key Board" Value="Key Board" />
</asp:CheckBoxList>

Default.aspx.cs

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        List<ListItem> selectedItem = (List<ListItem>)Session["SeletedItem"];
        foreach (ListItem item in selectedItem)
        {
            this.chkSeletedItems.Items.FindByValue(item.Text).Selected = true;
        }
    }
}

Screenshot

I agree, here is the link: https://www.e-iceblue.com/Introduce/spire-office-for-net-free.html

Populate CheckBoxList from ListBox data and Vice Versa in ASP.Net

Company

Explore

Follow us

Contact Us