WPF

<Window xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"
        x:Class="ICP.Reporting.WPFReportViewer.Windows.Report_Script_Resultaten"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d"
        xmlns:navigation="clr-namespace:Infragistics.Silverlight.SampleBrowser.Framework.Controls;assembly=Infragistics.Silverlight.SampleBrowser.Framework"
        xmlns:ig="http://schemas.infragistics.com/xaml"
        xmlns:sys="clr-namespace:System;assembly=mscorlib"
        xmlns:uri="clr-namespace:ICP.Reporting.WPFReportViewer.Resources.ReportUri"
        xmlns:res="clr-namespace:ICP.Reporting.WPFReportViewer.Resources.Pages"
        d:DesignHeight="500" d:DesignWidth="567" SizeToContent="WidthAndHeight"
        Title="Report Scripts Resultaten"
        WindowStartupLocation="CenterScreen" Icon="/ICP.Reporting.WPFReportViewer;component/Images/Report_New.ico">

    <Window.Resources>
        <uri:ReportLibraryUri x:Key="ReportLibraryUri" />
        <res:ParametersStrings x:Key="ParametersStrings" />        
    </Window.Resources>

    <Grid x:Name="LayoutRoot" HorizontalAlignment="Stretch">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"></RowDefinition>
            <RowDefinition Height="*"/>           
        </Grid.RowDefinitions>

        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"></ColumnDefinition>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>

        <StackPanel Name="stackPanelParameters" Orientation="Vertical" VerticalAlignment="Top" Height="Auto" HorizontalAlignment="Center" Width="170" Grid.Row="0" Grid.RowSpan="1" Grid.Column="0" Grid.ColumnSpan="1" Margin="10,5">
            
            <GroupBox Name="groupBoxBeginEindDatum" Header="Kies begin- en einddatum" Height="Auto" Width="Auto" Margin="0,5,0,0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center">
                <StackPanel Name="stackPanelBeginEindDatum" Orientation="Vertical" VerticalAlignment="Center" HorizontalAlignment="Center" Height="Auto" Width="Auto" >
                    <!-- <Label Height="28" Content="{Binding Source={StaticResource ParametersStrings}, Path=Binding_StartDate}" Margin="15,10,5,10" Width="77"/> -->
                    <Label Height="20" Content="Begindatum:" Margin="15,5,15,0" Width="77" Padding="5,0" HorizontalAlignment="Center" HorizontalContentAlignment="Center" />
                    <!--<DatePicker Name="datePickerBeginDatum" Height="23" Width="120" SelectedDateFormat="Short" DisplayDate="{x:Static sys:DateTime.Now}" Text="" SelectedDate="{x:Static sys:DateTime.Now}" Margin="5,0" Padding="2" />-->
                    <DatePicker Name="datePickerBeginDatum" Height="23" Width="120" SelectedDateFormat="Short" DisplayDate="01-01-2012" Text="" SelectedDate="01-01-2012" Margin="5,0" Padding="2" />
                    <!-- <Label Height="28" Content="{Binding Source={StaticResource ParametersStrings}, Path=Binding_EndDate}" Margin="15,10,5,10" Width="70"/> -->
                    <Label Height="20" Content="Einddatum:" Margin="15,5,15,0" Width="77" Padding="5,0" HorizontalAlignment="Center" HorizontalContentAlignment="Center" />
                    <!--<DatePicker Name="datePickerEindDatum" Height="23" Width="120" SelectedDateFormat="Short" DisplayDate="{x:Static sys:DateTime.Now}" Text="" SelectedDate="{x:Static sys:DateTime.Now}" Margin="5,0" Padding="2" />-->
                    <DatePicker Name="datePickerEindDatum" Height="23" Width="120" SelectedDateFormat="Short" DisplayDate="12-31-2012" Text="" SelectedDate="12-31-2012" Margin="5,0" Padding="2" />
                </StackPanel>
            </GroupBox>
                        
            <GroupBox Name="groupBoxAuthoriteitScript" Header="En authoriteit en script" Height="Auto" Width="Auto" Margin="0,5,0,0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center">
                <StackPanel Name="stackPanelAuthoriteitScript" Orientation="Vertical" VerticalAlignment="Center" HorizontalAlignment="Center" Height="Auto" Width="Auto">
                    <Label Height="20" Content="Authoriteit:" Margin="15,5,15,0" Width="77" Padding="5,0" HorizontalAlignment="Center" HorizontalContentAlignment="Center" />
                    <ComboBox Height="25" Name="comboBoxAuthoriteit" Margin="5,0" Padding="2" SelectedIndex="-1" ItemsSource="{Binding}" DisplayMemberPath="Name" IsSynchronizedWithCurrentItem="True" SelectionChanged="comboBoxAuthoriteit_SelectionChanged" />
                    <Label Height="20" Content="Script:" Margin="15,5,15,0" Width="77" Padding="5,0" HorizontalAlignment="Center" HorizontalContentAlignment="Center" />
                    <ComboBox Height="25" Name="comboBoxScript" Margin="5,0" Padding="2" SelectedIndex="-1" ItemsSource="{Binding}" DisplayMemberPath="Name" />
                </StackPanel>
            </GroupBox>

            <GroupBox Name="groupBoxRapport" Header="Rapport" Height="Auto" Width="Auto" Margin="0,5,0,0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center">
                <StackPanel Name="stackPanelRapport" Orientation="Vertical" VerticalAlignment="Center" HorizontalAlignment="Center" Height="Auto" Width="Auto">
                    <!-- <Button Content="{Binding Source={StaticResource ParametersStrings}, Path=Refresh}" Margin="20,5,10,5" Click="Button_Refresh_Click" Height="23" Width="61" /> -->
                    <Button Content="Genereer rapport" Margin="5" Click="Button_Refresh_Click" Height="23" Width="100" HorizontalAlignment="Center" VerticalAlignment="Center" />
                </StackPanel>
            </GroupBox>
            
        </StackPanel>

        <ig:XamReportViewer HorizontalAlignment="Center" Name="xamReportViewer1" VerticalAlignment="Bottom" PageFit="Width" UseLayoutRounding="True" MinWidth="380" MinHeight="445" PageMargin="0" AutoRender="True" Grid.Row="0" Grid.Column="1" Margin="0">
            <ig:XamReportViewer.RenderSettings>
                <ig:ClientRenderSettings DefinitionUri="/ICP.Reporting.ReportingClassLibrary;component/ReportDesigns/Report_Scripts_Resultaten.igr" />
            </ig:XamReportViewer.RenderSettings>

            <!-- Binding parameters -->
            <ig:XamReportViewer.Parameters>
                <ig:Parameter ParameterName="beginDatum" ParameterValue="{Binding ElementName=datePickerBeginDatum, Path=SelectedDate}"/>
                <ig:Parameter ParameterName="eindDatum" ParameterValue="{Binding ElementName=datePickerEindDatum, Path=SelectedDate}"/>
                <!--<ig:Parameter ParameterName="Maand" ParameterValue="{Binding ElementName=comboBoxMaand, Path=SelectedValue}"/>
                <ig:Parameter ParameterName="Jaar" ParameterValue="{Binding ElementName=comboBoxJaar, Path=SelectedValue}"/>
                <ig:Parameter ParameterName="Authoriteit" ParameterValue="{Binding ElementName=comboBoxAuthoriteit, Path=SelectedItem}"/>
                <ig:Parameter ParameterName="Script" ParameterValue="{Binding ElementName=comboBoxScript, Path=SelectedItem}"/>-->
            </ig:XamReportViewer.Parameters>

        </ig:XamReportViewer>
    </Grid>
    
</Window>

using ICP.Reporting.ReportingClassLibrary;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using Infragistics.Controls.Reports;

namespace ICP.Reporting.WPFReportViewer.Windows
{
    /// <summary>
    /// Interaction logic for Report_Script_Resultaten.xaml
    /// </summary>
    public partial class Report_Script_Resultaten : Window
    {
        public Report_Script_Resultaten()
        {
            InitializeComponent();

            CultureInfo ci = CultureInfo.CreateSpecificCulture(CultureInfo.CurrentCulture.Name);
            ci.DateTimeFormat.ShortDatePattern = "dd/MM/yyyy";
            ci.DateTimeFormat.DateSeparator = "-";
            Thread.CurrentThread.CurrentCulture = ci;

            //datePickerBeginDatum.DisplayDate = DateTime.Today.AddDays(-7);
            //datePickerBeginDatum.SelectedDate = DateTime.Today.AddDays(-7);
            //datePickerEindDatum.DisplayDate = DateTime.Today.AddDays(-1);            
            //datePickerEindDatum.SelectedDate = DateTime.Today.AddDays(-1);

            BindComboBoxAuthoriteit(comboBoxAuthoriteit);            
        }

        private void Button_Refresh_Click(object sender, RoutedEventArgs e)
        {
            this.xamReportViewer1.Refresh();
        }

        public void BindComboBoxAuthoriteit(ComboBox comboBoxName)
        {
            string strConnectionAuthoriteit = ConfigurationManager.ConnectionStrings["ICP.Reporting.ReportingClassLibrary.Properties.Settings.sqlDS_Authorities"].ConnectionString;
            SqlConnection connectionAuthoriteit = new SqlConnection(strConnectionAuthoriteit);
            SqlDataAdapter daAuthoriteit = new SqlDataAdapter("SELECT Authority_ID, Description FROM Authorities ORDER BY Description", connectionAuthoriteit);
            DataSet dsAuthoriteit = new DataSet();
            daAuthoriteit.Fill(dsAuthoriteit, "Authorities");
            comboBoxName.ItemsSource = dsAuthoriteit.Tables[0].DefaultView;
            comboBoxName.DisplayMemberPath = dsAuthoriteit.Tables[0].Columns["Description"].ToString();
            comboBoxName.SelectedValuePath = dsAuthoriteit.Tables[0].Columns["Authority_ID"].ToString();
        }

        private void comboBoxAuthoriteit_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (comboBoxAuthoriteit.SelectedIndex > -1)
            {
                BindComboBoxScript(comboBoxScript);
            }
        }

        public void BindComboBoxScript(ComboBox comboBoxName)
        {
            string strqryScript = string.Format("SELECT Questionnaire_Id, Questionnaire_Name FROM Questionnaires WHERE (Authority_ID = {0}) ORDER BY Questionnaire_Name", comboBoxAuthoriteit.SelectedItem);

            string strConnectionScript = ConfigurationManager.ConnectionStrings["ICP.Reporting.ReportingClassLibrary.Properties.Settings.sqlDS_Scripts"].ConnectionString;
            SqlConnection connectionScript = new SqlConnection(strConnectionScript);            
            SqlDataAdapter daScript = new SqlDataAdapter(strqryScript, connectionScript);
            DataSet dsScript = new DataSet();
            //DataTable dtScript = new DataTable();
            daScript.Fill(dsScript, "Questionnaires");

            comboBoxName.ItemsSource = dsScript.Tables[0].DefaultView;
            comboBoxName.DisplayMemberPath = dsScript.Tables[0].Columns["Questionnaire_Name"].ToString();
            comboBoxName.SelectedValuePath = dsScript.Tables[0].Columns["Questionnaire_Id"].ToString();

            //foreach (DataRow drScript in dsScript.Tables)
            //{
            //comboBoxScript.Items.Add(drScript[0].ToString());

            //}
        }
    }    
}

<RichTextBox x:Name="rtf" wpfPages:ScrollBarUtils.VerticalScrollValue="{Binding ElementName=scroll, Path=Value}"/>

<ScrollBar x:Name="scroll" Value="{Binding ElementName=rtf, Path=(wpfPages:ScrollBarUtils.VerticalScrollValue)}"/>