Winform的Formborder.None情况下，解决不能拖动的问题

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
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.Navigation;
using System.Windows.Shapes;namespace MoYuForm2
{
<UserControl x:Class="MoYuForm2.TopToolBarPage"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:local="clr-namespace:MoYuForm2"mc:Ignorable="d" d:DesignHeight="450" d:DesignWidth="800"Background="Transparent"><Grid  Background="Transparent"MouseDown="Grid_MouseDown"MouseMove="Grid_MouseMove"MouseUp="Grid_MouseUp"><Grid.RowDefinitions><RowDefinition /></Grid.RowDefinitions><Grid><Grid.ColumnDefinitions><ColumnDefinition Width="100"/><ColumnDefinition/></Grid.ColumnDefinitions><Button Content="JohnYang" Width="100"/><StackPanel Grid.Column="1" Orientation="Horizontal"HorizontalAlignment="Right"><Button x:Name="opacityBtn" Click="opacityBtn_Click"Background="Transparent"BorderBrush="Transparent"BorderThickness="0"Padding="3"><Image Source="/Resources/opacity.png" Stretch="None"/></Button><Button Click="pinBtn_Click"Background="Transparent"BorderBrush="Transparent"BorderThickness="0"Padding="3"><Image Source="/Resources/pin-fill.png" Stretch="None"/></Button><Button x:Name="pinBtn"Click="pinBtn_Click"Background="Transparent"BorderBrush="Transparent"BorderThickness="0"Padding="3"><Image Source="/Resources/pin.png" Stretch="None"/></Button><Button x:Name="minBtn" Click="minBtn_Click"Background="Transparent"BorderBrush="Transparent"BorderThickness="0"Padding="3"><Image Source="/Resources/min.png" Stretch="None"/></Button><Button x:Name="closeBtn" Click="closeBtn_Click" Background="Transparent"BorderBrush="Transparent"BorderThickness="0"Padding="3"><Image Source="/Resources/close.png" Stretch="None"/></Button></StackPanel></Grid></Grid>
</UserControl>/// <summary>/// TopToolBarPage.xaml 的交互逻辑/// </summary>public partial class TopToolBarPage : System.Windows.Controls.UserControl{[DllImport("user32.dll")]private static extern bool ReleaseCapture();[DllImport("user32.dll")]private static extern IntPtr SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);private const int WM_NCLBUTTONDOWN = 0xA1;private const int HTCAPTION = 0x2;System.Windows.Point _mouseDownPos;System.Drawing.Point _formDownPos;bool _ifPressLeft = false;MoYuForm2 _form;public TopToolBarPage(MoYuForm2 form){InitializeComponent();_form = form;var a = this.closeBtn.Width;}private void opacityBtn_Click(object sender, RoutedEventArgs e){}private void closeBtn_Click(object sender, RoutedEventArgs e){_form.Close();}private void minBtn_Click(object sender, RoutedEventArgs e){}private void pinBtn_Click(object sender, RoutedEventArgs e){}private void Grid_MouseDown(object sender, MouseButtonEventArgs e){if (e.LeftButton == MouseButtonState.Pressed){ReleaseCapture();//“当前窗口/控件不要再独占鼠标了，把鼠标输入还给系统。”SendMessage(_form.Handle, WM_NCLBUTTONDOWN, HTCAPTION, 0);//WM_NCLBUTTONDOWN + HTCAPTION 消息时，会认为你点下了窗口标题栏。}}private void Grid_MouseMove(object sender, System.Windows.Input.MouseEventArgs e){}private void Grid_MouseUp(object sender, MouseButtonEventArgs e){}}
}