添加项目文件。

Views/ChatMdView.xaml

@@ -0,0 +1,74 @@
+<UserControl x:Class="YwxApp.AiChat.Views.ChatMdView"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:markdig="clr-namespace:Markdig.Wpf;assembly=Markdig.Wpf"
+             mc:Ignorable="d"
+             d:DesignHeight="450" d:DesignWidth="800">
+    <UserControl.Resources >
+        <ResourceDictionary>
+            <!--Resource dictionary：Add control style.-->
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="Style/ButtonStyle.xaml"/>
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </UserControl.Resources>
+    <Grid Background="#0F000F">
+
+        <Grid.RowDefinitions>
+            <RowDefinition Height="*" />
+            <RowDefinition Height="200" />
+            <RowDefinition Height="50" />
+        </Grid.RowDefinitions>
+
+        <!--First line: Display output text to "Markdown" container-->
+        <Grid Grid.Row="0">
+            <ScrollViewer Background="#FFFFFF" x:Name="MarkDownScrollViewer">
+                <!--Bind event command to the ScrollViewer-->
+                <i:Interaction.Triggers>
+                    <i:EventTrigger EventName="ScrollChanged">
+                        <i:InvokeCommandAction Command = "{Binding ScrollToEndCommand}"
+                            CommandParameter="{Binding ElementName=MarkDownScrollViewer}" />
+                    </i:EventTrigger>
+                </i:Interaction.Triggers>
+                <!--scrollviewer internal container-->
+                <markdig:MarkdownViewer x:Name="MarkdownOutputBox" Markdown="{Binding MarkdownContent}" />
+            </ScrollViewer>
+        </Grid>
+
+        <!-- the second line  -->
+        <Grid Grid.Row="1">
+            <TextBox x:Name="InputBox"
+             Text="{Binding InputText , Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" 
+             Grid.Row="1"  Margin="5" AcceptsReturn="True" 
+             VerticalScrollBarVisibility="Auto">
+                <!--key binding of "Enter"-->
+                <TextBox.InputBindings>
+                    <KeyBinding Command="{Binding SubmitQuestionCommand}" Key="Enter"/>
+                </TextBox.InputBindings>
+            </TextBox>
+        </Grid>
+
+        <!-- The third line： submit button  -->
+        <Grid Grid.Row="2">
+            <WrapPanel Grid.Row="2"  HorizontalAlignment="Right">
+
+                <Button x:Name="BtnNewChat" Content="新建会话" 
+                     HorizontalAlignment="Right"
+                     Style="{StaticResource RoundCornerButtonStyle}"
+                     Command="{Binding NewSessionCommand}" 
+                     Width="100" 
+                     Height="30"/>
+                <Button x:Name="BtnSubmit"  Content="提交" 
+                    HorizontalAlignment="Right"
+                    Style="{StaticResource RoundCornerButtonStyle}"
+                    Command="{Binding SubmitQuestionCommand}" 
+                    Width="100" 
+                    Height="30"/>
+            </WrapPanel>
+        </Grid>
+
+    </Grid>
+</UserControl>