Mini Kabibi Habibi

<local:GridDemoModule x:Class="GridDemo.UnboundColumns"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core"
    xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
 xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors"
 xmlns:dxdb="http://schemas.devexpress.com/winfx/2008/xaml/demobase"
    xmlns:local="clr-namespace:GridDemo"
    xmlns:collections="clr-namespace:System.Collections;assembly=mscorlib"
    xmlns:sys="clr-namespace:System;assembly=mscorlib"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    mc:Ignorable="d" d:DesignHeight="400" d:DesignWidth="800">
    <local:GridDemoModule.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="/GridDemo;component/ModuleResources/UnboundColumnsTemplates.xaml" />
            </ResourceDictionary.MergedDictionaries>
            <dxdb:NWindDataLoader x:Key="NWindDataLoader" />
        </ResourceDictionary>
    </local:GridDemoModule.Resources>
    <dxdb:DemoModuleControl>
        <dxdb:DemoModuleControl.OptionsContent>
            <StackPanel MinWidth="160">
                <dx:GroupFrame Header="Column:">
                    <dxe:ListBoxEdit Background="{x:Null}" ShowBorder="False" Name="columnsList" SelectedIndex="0">
                        <dxe:ListBoxEdit.StyleSettings>
                            <dxe:RadioListBoxEditStyleSettings />
                        </dxe:ListBoxEdit.StyleSettings>
                        <dxe:ListBoxEdit.Items>
                            <dxe:ListBoxEditItem Tag="DiscountAmount">Discount Amount</dxe:ListBoxEditItem>
                            <dxe:ListBoxEditItem Tag="Total">Total</dxe:ListBoxEditItem>
                            <dxe:ListBoxEditItem Tag="TotalScale">Total Scale</dxe:ListBoxEditItem>
                        </dxe:ListBoxEdit.Items>
                    </dxe:ListBoxEdit>
                </dx:GroupFrame>
                <Button Margin="0,12,0,0" Name="showExpressionEditorButton" Click="showExpressionEditorButton_Click">Show Expression Editor</Button>
            </StackPanel>
        </dxdb:DemoModuleControl.OptionsContent>
        <dxg:GridControl Name="grid" Grid.Column="0" ItemsSource="{Binding Path=InvoicesNew, Source={StaticResource NWindDataLoader}}">
            <dxg:GridControl.Columns>
                <dxg:GridColumn x:Name="colOrderID" FieldName="OrderID" Width="80" FixedWidth="True" GroupIndex="0" />
                <dxg:GridColumn x:Name="colProduct" FieldName="ProductID" MinWidth="200" Width="200">
                    <dxg:GridColumn.EditSettings>
                        <dxe:ComboBoxEditSettings AutoComplete="True" ImmediatePopup="True" ValueMember="ProductID" DisplayMember="ProductName" ItemsSource="{Binding Path=Products, Source={StaticResource NWindDataLoader}}" />
                    </dxg:GridColumn.EditSettings>
                </dxg:GridColumn>
                <dxg:GridColumn x:Name="colUnitPrice" FieldName="UnitPrice" MinWidth="30">
                    <dxg:GridColumn.EditSettings>
                        <dxe:TextEditSettings MaskType="Numeric" MaskUseAsDisplayFormat="True" Mask="c" MaskCulture="en-US" />
                    </dxg:GridColumn.EditSettings>
                </dxg:GridColumn>
                <dxg:GridColumn x:Name="colDiscount" FieldName="Discount" MinWidth="30">
                    <dxg:GridColumn.EditSettings>
                        <dxe:TextEditSettings MaskType="Numeric" MaskUseAsDisplayFormat="True" Mask="p0" />
                    </dxg:GridColumn.EditSettings>
                </dxg:GridColumn>
                <dxg:GridColumn x:Name="colQuantity" FieldName="Quantity" MinWidth="30" />
                <dxg:GridColumn x:Name="colDiscountAmount" FieldName="DiscountAmount" UnboundType="Decimal" UnboundExpression="Round([UnitPrice] * [Quantity] - [Total])" MinWidth="100" AllowEditing="False" AllowUnboundExpressionEditor="True">
                    <dxg:GridColumn.EditSettings>
                        <dxe:TextEditSettings DisplayFormat="$0.00" />
                    </dxg:GridColumn.EditSettings>
                </dxg:GridColumn>
                <dxg:GridColumn x:Name="colTotal" FieldName="Total" UnboundType="Decimal" UnboundExpression="([UnitPrice] * [Quantity]) * (1 - [Discount])" CellTemplateSelector="{StaticResource  totalCellTemplateSelector}" MinWidth="100" AllowEditing="False" AllowUnboundExpressionEditor="True">
                    <dxg:GridColumn.EditSettings>
                        <dxe:TextEditSettings DisplayFormat="$0.00" />
                    </dxg:GridColumn.EditSettings>
                </dxg:GridColumn>
                <dxg:GridColumn x:Name="colTotalScale" FieldName="TotalScale" Visible="False" ShowInColumnChooser="False" UnboundType="Decimal" UnboundExpression="Iif([Total] &lt; 1000, 0.4, Min((0.5 + ([Total] - 1000) / 1000), 1.2))" AllowUnboundExpressionEditor="True" />
            </dxg:GridControl.Columns>
            <dxg:GridControl.GroupSummary>
                <dxg:GridSummaryItem FieldName="ProductID" SummaryType="Count" />
                <dxg:GridSummaryItem FieldName="Total" SummaryType="Sum" />
            </dxg:GridControl.GroupSummary>
            <dxg:GridControl.TotalSummary>
                <dxg:GridSummaryItem SummaryType="Count" Alignment="Right"/>
                <dxg:GridSummaryItem FieldName="Total" SummaryType="Sum" Alignment="Left"/>
            </dxg:GridControl.TotalSummary>
            <dxg:GridControl.View>
                <dxg:TableView AutoWidth="True" ShowFixedTotalSummary="True" />
            </dxg:GridControl.View>
        </dxg:GridControl>
    </dxdb:DemoModuleControl>
</local:GridDemoModule>