Insert into DB on Click event

[Ricardo]

Hello!

At this moment I have 3 RadListBoxes side by side and an Button like the code bellow.
The purpose is to select items on the 3 listBoxes and click on the "assign" button, and select those select items on a Table on my database.

I have already my 3 ListBoxes populating data using DataBind().
Can you show me an example of doing that with MVP and Entity Framework? All the 3 list boxes have multiple selection, and i have already the edmx created for my database and the class for that table, i want to insert data named (UsersAssign).

<telerik:RadListBox ID="RadListBox1" runat="server" AllowReorder="True" Skin="Black"
        SelectionMode="Multiple" Sort="Ascending" Height="400px" Width="250px" EnableDragAndDrop="True">
        <ButtonSettings TransferButtons="All"></ButtonSettings>
        <HeaderTemplate>
            <h5 style="color: White; text-align: center">
                USERS</h5>
        </HeaderTemplate>
    </telerik:RadListBox>
    <telerik:RadListBox ID="RadListBox2" runat="server" SelectionMode="Multiple" EnableDragAndDrop="True"
        Height="400px" Width="200px" AllowReorder="True" Skin="Black">
        <ButtonSettings TransferButtons="All"></ButtonSettings>
        <HeaderTemplate>
            <h5 style="color: White; text-align: center">
                GROUPS</h5>
        </HeaderTemplate>
    </telerik:RadListBox>
    <telerik:RadListBox ID="RadListBox3" runat="server" SelectionMode="Multiple" EnableDragAndDrop="True"
        Height="400px" Width="200px" AllowReorder="True" Skin="Black">
        <ButtonSettings TransferButtons="All"></ButtonSettings>
        <HeaderTemplate>
            <h5 style="color: White; text-align: center">
                STAGING</h5>
        </HeaderTemplate>
    </telerik:RadListBox>
    <telerik:RadButton ID="RadButton1" runat="server" Text="Assign" Skin="Black"
        Width="100px" Height="50px" onclick="RadButton1_Click">
    </telerik:RadButton>