RESTClient/RESTClient/MainWindow.xaml

<Window x:Class="RESTClient.MainWindow"
        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"
        xmlns:local="clr-namespace:RESTClient"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <!--选择框-->
        <ComboBox x:Name="requestMethodInput" HorizontalAlignment="Left" Margin="10,100,0,0" VerticalAlignment="Top" Width="120" SelectedIndex="0">
            <ComboBoxItem Content="GET"/>
            <ComboBoxItem Content="POST"/>
            <ComboBoxItem Content="PUT"/>
            <ComboBoxItem Content="DELETE"/>
        </ComboBox>
        <Label Content="Request Method" HorizontalAlignment="Left" Margin="10,69,0,0" VerticalAlignment="Top"/>
        <Label Content="Target URI" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top"/>
        <TextBox x:Name="targetUrlInput" HorizontalAlignment="Left" Height="23" Margin="10,41,0,0" TextWrapping="Wrap" Text="localhost" VerticalAlignment="Top" Width="120"/>
        <Label Content="Response" HorizontalAlignment="Left" Margin="10,127,0,0" VerticalAlignment="Top"/>

        <TextBox x:Name="responseOutput" HorizontalAlignment="Left" Height="226" Margin="10,158,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="772" AcceptsReturn="True" AcceptsTab="True"/>
        <Label Content="Request Body" HorizontalAlignment="Left" Margin="135,10,0,0" VerticalAlignment="Top"/>
 
        <TextBox x:Name="requestBodyInput" HorizontalAlignment="Left" Height="112" Margin="135,41,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="647" Text="{}{ }" IsReadOnly="True"/>
        <Button x:Name="sendRequestButton" Content="Send Request" HorizontalAlignment="Left" Margin="10,389,0,0" VerticalAlignment="Top" Width="85" Click="OnSendRequestButtonClicked"/>
        <Label x:Name="responseCodeLabel" Content="Response Code: 000 (NAME)" HorizontalAlignment="Left" Margin="200,10,0,0" VerticalAlignment="Top" Width="582" HorizontalContentAlignment="Right"/>
    </Grid>
</Window>