串口助手

UI效果图

UI代码

<Window x:Class="Modbus.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="串口助手" Height="400" Width="600" Closing="CloseWindow" >
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="192*"></RowDefinition>
            <RowDefinition Height="82*"></RowDefinition>
            <RowDefinition Height="97*"></RowDefinition>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions >
            <ColumnDefinition Width="266*"></ColumnDefinition>
            <ColumnDefinition Width="327*"></ColumnDefinition>
        </Grid.ColumnDefinitions>
        <!--设置一个控件块-->
        <GroupBox Header="串口参数设置"
                  BorderBrush="Blue"></GroupBox>
        <StackPanel>
            <!-- 第一行要摆放的控件-->
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="串口号" Width="auto" Margin="5,10" Padding="0,6,0,0"></TextBlock>
                <ComboBox Name="cb_SerialPort" Margin="5,15"  Width="65" >
        
                </ComboBox>
                <TextBlock Text="波特率" Width="auto" Margin="5,10" Padding="0,6,0,0"></TextBlock>
                <ComboBox Name="cb_Baudate" Margin="5,15" Width="65" SelectedIndex="4">
                    <ComboBoxItem Content="600"></ComboBoxItem>
                    <ComboBoxItem Content="1200"></ComboBoxItem>
                    <ComboBoxItem Content="2400"></ComboBoxItem>
                    <ComboBoxItem Content="4800"></ComboBoxItem>
                    <ComboBoxItem Content="9600"></ComboBoxItem>
                    <ComboBoxItem Content="14400"></ComboBoxItem>
                    <ComboBoxItem Content="19200"></ComboBoxItem>
                </ComboBox>
            </StackPanel>
            
            <!--第二行要摆放的控件-->            
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="校验位" Margin="5" Width="auto" Padding="0,6,0,0"></TextBlock> 
                <ComboBox Name="cb_Parity" Width="65" Margin="5,10,5,10" SelectedIndex="2" >
                    <ComboBoxItem Content="奇校验"></ComboBoxItem>
                    <ComboBoxItem Content="偶校验"></ComboBoxItem>
                    <ComboBoxItem Content="无校验"></ComboBoxItem>
                </ComboBox>
                <TextBlock Text="数据位" Margin="5,10,5,10" ></TextBlock>
                <ComboBox Name="cb_DataBit" Width="68" Margin="5,10" SelectedIndex="1">
                    <ComboBoxItem Content="0"></ComboBoxItem>
                    <ComboBoxItem Content="8"></ComboBoxItem>
                    <ComboBoxItem Content="2"></ComboBoxItem>
                </ComboBox>
            </StackPanel>
            <!--第三行摆放的控件-->
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="停止位" Margin="5" Padding="0,6,0,0"></TextBlock>
                <ComboBox Name="cb_StopBit" Margin="5,10" Width="65" SelectedIndex="1">
                    <ComboBoxItem Content="0"></ComboBoxItem>
                    <ComboBoxItem Content="1"></ComboBoxItem>
                    <ComboBoxItem Content="2"></ComboBoxItem>
                </ComboBox> 
            </StackPanel>

            <StackPanel Orientation="Horizontal">
                <TextBlock Name="tb_SwitchSerial" Text="串口为关闭状态" Margin="5" Padding="0,6,0,0" Width="auto" ></TextBlock>
                <Ellipse Name="e_status" Fill="#000000" Stroke="Black" Height="10" Width="10" Margin="5,10,5,10"  ></Ellipse>
                    <Button Name="bt_serialSwitch" Content="打开串口" Margin="5" Click="Button_CLickSwithSerial"></Button>
            </StackPanel>
        </StackPanel>
        <!-- 接受数据设置-->
        <GroupBox Grid.Row="1" Grid.Column="0" BorderBrush="Black" Header="接受数据设置" ></GroupBox>
        <StackPanel Grid.Row="1" Grid.Column="0" >
            <StackPanel Orientation="Horizontal" >
                <Button Content="清空接收数据" Margin="10,20" Click="Button_ClickClrReceive" ></Button>
                <Button Name="bt_StopReceive" Content="停止接收数据" Margin="40,20" Click="Button_ClickStopReceive"></Button>
            </StackPanel>
        </StackPanel>
        <!--发送数据设置-->
        <GroupBox Grid.Row="2" Grid.Column="0" BorderBrush="Yellow"></GroupBox>
        <StackPanel Grid.Row="2" Grid.Column="0">
            <StackPanel Orientation="Horizontal">
                <Button Content="清空发送数据" Margin="10,20" Click="Button_ClickClrSend"></Button>
                <Button Name="bt_HandSend" Content="手动发送" Margin="40,20"  Click="Button_ClickHandSend"></Button>
            </StackPanel>
        </StackPanel>
        <!--接收数据文本框设置-->
        <GroupBox  Grid.Row="0" Grid.RowSpan="2" Grid.Column="1" BorderBrush="Red" Header="接收数据区"></GroupBox>
        <StackPanel Grid.Row="0" Grid.RowSpan="2"  Grid.Column="1" >
            <TextBox Margin="5,20" TextWrapping="Wrap" Name="tbox_receive" Height="240"></TextBox>
        </StackPanel>
        <!--发送文本框-->
        <GroupBox Grid.Row="2"  Grid.Column="1" BorderBrush="Black" Header="数据发送"></GroupBox>
        <StackPanel Grid.Row="2" Grid.Column="1" Orientation="Vertical">
            <ScrollViewer VerticalScrollBarVisibility="Auto"> 
                <TextBox Name="tbox_send" Margin="5,20,5,5" Height="70" ></TextBox>
            </ScrollViewer>  
        </StackPanel>

    </Grid>
</Window>

参考资料：
[1]
https://blog.****.net/weixin_42462552/article/details/85937289

[2]
https://docs.microsoft.com/zh-cn/dotnet/api/system.io.ports?view=netframework-4.7.2
[3]