Correlated Action ComboBox Behavior

<UserControl xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
             xmlns:loc="clr-namespace:TestCorrTextBoxCustBehavior">

       <ComboBox Height="23" HorizontalAlignment="Left" Margin="12,48,0,0" Name="cb1" VerticalAlignment="Top" Width="120" >
            <i:Interaction.Behaviors>
                <loc:CorrelatedActionComboBoxBehavior SourceRegularExpression="['Basket Swap'|'CDS']" SourceTriggerType="RegExpression"  TargetControlId="lb1" TargetActionType="SetValue" TargetValue="2"/>
            </i:Interaction.Behaviors>
            <ComboBoxItem>1</ComboBoxItem>
            <ComboBoxItem>Basket Swap</ComboBoxItem>
            <ComboBoxItem>CDS</ComboBoxItem>
        </ComboBox>
        <TextBox Height="23" HorizontalAlignment="Left" Margin="268,48,0,0" Name="textBox2"  VerticalAlignment="Top" Width="120" />
        <ListBox Name="lb1" Width="100" Height="200" Margin="355,91,48,20">
            <ListBoxItem>1</ListBoxItem>
            <ListBoxItem>2</ListBoxItem>
            <ListBoxItem>3</ListBoxItem>
        </ListBox>



   public class CorrelatedActionComboBoxBehavior : Behavior</ComboBox>
    {

        public SourceTriggerType SourceTriggerType { get; set; }
        public string SourceRegularExpression { get; set; }
        public string TargetControlId { get; set; }
        public TargetActionType TargetActionType { get; set; }
        public string TargetValue { get; set; }
       
        protected override void OnAttached()
        {
            if (!(AssociatedObject is ComboBox)) return;
            object obj = AssociatedObject.Parent;
            Control mw = ((System.Windows.Controls.Panel)(obj)).Parent as Window;
            if (mw==null)
             mw = ((System.Windows.Controls.Panel)(obj)).Parent as Control;
            if (mw == null) return;

            AssociatedObject.DropDownClosed += (sender, e) =>
                { 
                    ComboBox cb = AssociatedObject as ComboBox;
                    if (SourceTriggerType == SourceTriggerType.RegExpression)
                    {
                        Regex r = new Regex(SourceRegularExpression);

                        Control c = FindChild(mw, TargetControlId);
                        c.IsEnabled = true;
                        if (r.IsMatch(cb.Text) )
                        {
                           if ( TargetActionType== TargetActionType.Disable ) c.IsEnabled = false;
                           if (TargetActionType == TargetActionType.SetValue)
                           {
                               ListBox lb = c as ListBox;
                               if (lb != null && TargetValue!="") SetListBoxValue(lb, TargetValue);
                           }

                        }
                    }
                };
        }

        private void SetListBoxValue(ListBox lb, string p)
        {
            for(int i=0;i< lb.Items.Count;i++)
            {
                if ((lb.Items[i] as ListBoxItem).Content.ToString()  == p) lb.SelectedIndex = i;
            }
        }

        public static T FindChild(DependencyObject parent, string childName)    where T : DependencyObject {      
            // Confirm parent and childName are valid.   
            if (parent == null) return null;    
            T foundChild = null;    
            int childrenCount = VisualTreeHelper.GetChildrenCount(parent);  
            for (int i = 0; i < childrenCount; i++)   {   
                var child = VisualTreeHelper.GetChild(parent, i);    
                // If the child is not of the request child type child   
                T childType = child as T;    
                if (childType == null)     {     
                    // recursively drill down the tree    
                    foundChild = FindChild(child, childName);     
                    // If the child is found, break so we do not overwrite the found child.     
                    if (foundChild != null) break;     }    
                else if (!string.IsNullOrEmpty(childName))     {   
                    var frameworkElement = child as FrameworkElement;     
                    // If the child's name is set for search     
                    if (frameworkElement != null && frameworkElement.Name == childName)       {    
                        // if the child's name is of the request name       
                        foundChild = (T)child;         break;       }     }  
                else     {       
                    // child element found.      
                    foundChild = (T)child;       break;     }   }  
            return foundChild; } 

     }

    public enum SourceTriggerType
    {
        RegExpression
    }

    public enum TargetActionType
    {
        Disable,
        SetValue
    }

WPF Custom Behavior

(1) Behavior is a gneric type <>, non-generic one has no public ctor
(2)  Need System.Interactivity.Dll from Blend SDK or MVVM light donwload

<Window x:Class="TestCustomBehavior.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525"
        xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
        xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions"
        xmlns:local="clr-namespace:TestCustomBehavior"
         >
    <Grid>
        <TextBlock Background="LightBlue" Height="23" HorizontalAlignment="Left" Margin="134,140,0,0" Name="textBlock1" Text="Drag Me Around" VerticalAlignment="Top" >
            <i:Interaction.Behaviors>
                <local:DragBehavior></local:DragBehavior>
            </i:Interaction.Behaviors>
        </TextBlock>
    </Grid>
</Window>



namespace TestCustomBehavior
{
    public class DragBehavior : Behavior<UIElement>
    {
        Point startPosMouse, startPosElement; int i = 0;
        TranslateTransform trans = new TranslateTransform();
        protected override void OnAttached()
        {
            Window parent = Application.Current.MainWindow;
            AssociatedObject.RenderTransform = trans;
            AssociatedObject.MouseLeftButtonDown += (sender, e) =>
                {
                    if (i == 0)
                    {
                        startPosElement = AssociatedObject.TranslatePoint(new Point(), parent); i = 1;
                    }
                    startPosMouse = e.GetPosition(parent);
                    AssociatedObject.CaptureMouse();
                };
            AssociatedObject.MouseLeftButtonUp += (sender, e) =>
                {
                    AssociatedObject.ReleaseMouseCapture();
                };

            AssociatedObject.MouseMove += (sender, e) =>
                {
                    Vector diff = e.GetPosition(parent) - startPosElement;
                    if (AssociatedObject.IsMouseCaptured)
                    {
                        trans.X= diff.X;
                        trans.Y = diff.Y;
                    }

                };
        }
    }
}

WPF Printing using FixedDcoument

Print Preview Popup as FixedDocument

(1) PageContent will has Compiler Error but can stil render with FixedPage---Known Defect of WPF.
(2) Fixed document will has toolbar shown by WPF, no coded needed. So this is simplest printing

<Window x:Class="TestWPFPrinting.PrintPreview"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="PrintPreview" Height="300" Width="300">
    <FixedDocument Name="customerReport">

        <PageContent>

            <FixedPage>
                <Label FontSize="20" Margin="100,20,0,0">REPORT</Label>
                <ListView  BorderThickness="0" Margin="50,100,0,0" FontSize="14" Width="Auto" Height="Auto" ItemsSource="{Binding}">
                    <ListView.View>
                        <GridView x:Name="gridReport">

                            <GridViewColumn Width="200" Header="FirstName" DisplayMemberBinding="{Binding Path=FirstName}">

                                <GridViewColumn.CellTemplate>
                                    <DataTemplate>
                                        <Label/>
                                    </DataTemplate>
                                </GridViewColumn.CellTemplate>
                            </GridViewColumn>
                            <GridViewColumn Width="200" Header="LastName" DisplayMemberBinding="{Binding Path=LastName}">
                                <GridViewColumn.CellTemplate>
                                    <DataTemplate>
                                        <Label/>
                                    </DataTemplate>
                                </GridViewColumn.CellTemplate>
                            </GridViewColumn>
                        </GridView>
                    </ListView.View>
                </ListView>

            </FixedPage>

        </PageContent>
    </FixedDocument>
</Window>

Bind to Data
   public partial class PrintPreview : Window
    {
        private List<Customer> _customers;
        public PrintPreview(List<Customer> customers) 
        {
            InitializeComponent();
            _customers = customers;
            // generate report 
            this.DataContext = _customers; 
        }
    }

    public class Customer
    {
        private string _firstName;
        private string _lastName;

        public string FirstName
        {
            get { return _firstName; }
            set { _firstName = value; }
        }

        public string LastName
        {
            get { return _lastName; }
            set { _lastName = value; }
        }
    }

Main Form
       private void button1_Click(object sender, RoutedEventArgs e)
        {

            List<Customer> customers = new List<Customer>();

            for (int i = 1; i <= 200; i++)
            {
                Customer customer = new Customer();
                customer.FirstName = "FirstName " + i;
                customer.LastName = "LastName " + i;
                customers.Add(customer);
            }
            PrintPreview w = new PrintPreview(customers);
            w.Show();