这篇文章主要介绍了基于C#如何实现磁性吸附窗体的相关知识，内容详细易懂，操作简单快捷，具有一定借鉴价值，相信大家阅读完这篇基于C#如何实现磁性吸附窗体文章都会有所收获，下面我们一起来看看吧。
效果
代码
public partial class Frm_Libretto : Form{ public Frm_Libretto() { InitializeComponent(); } #region 公共变量 FrmClass Cla_FrmClass = new FrmClass(); #endregion private void Frm_Libretto_Load(object sender, EventArgs e) { this.Top = FrmClass.Example_Play_Top; this.Left = FrmClass.Example_Play_Left + FrmClass.Example_Play_Width; Cla_FrmClass.FrmInitialize(this); } private void panel_Title_MouseDown(object sender, MouseEventArgs e) { FrmClass.CPoint = new Point(-e.X, -e.Y); } private void panel_Title_MouseMove(object sender, MouseEventArgs e) { FrmClass.Example_Assistant_AdhereTo = false; FrmClass.Example_Libretto_AdhereTo = false; Cla_FrmClass.FrmMove(this, e); } private void panel_Title_MouseUp(object sender, MouseEventArgs e) { Cla_FrmClass.FrmPlace(this); }}public partial class Frm_ListBox : Form{ public Frm_ListBox() { InitializeComponent(); } #region 公共变量 FrmClass Cla_FrmClass = new FrmClass(); #endregion private void Frm_ListBox_Load(object sender, EventArgs e) { this.Left = FrmClass.Example_Play_Left; this.Top = FrmClass.Example_Play_Top + FrmClass.Example_Play_Height; Cla_FrmClass.FrmInitialize(this); } private void panel_Title_MouseDown(object sender, MouseEventArgs e) { FrmClass.CPoint = new Point(-e.X, -e.Y); } private void panel_Title_MouseMove(object sender, MouseEventArgs e) { FrmClass.Example_Assistant_AdhereTo = false; FrmClass.Example_List_AdhereTo = false; Cla_FrmClass.FrmMove(this, e); } private void panel_Title_MouseUp(object sender, MouseEventArgs e) { Cla_FrmClass.FrmPlace(this); }}public partial class Frm_Play : Form{ public Frm_Play() { InitializeComponent(); } #region 公共变量 FrmClass Cla_FrmClass = new FrmClass(); public static Form F_List = new Form(); public static Form F_Libretto = new Form(); public static Form F_Screen = new Form(); #endregion private void Frm_Play_Load(object sender, EventArgs e) { //窗体位置的初始化 Cla_FrmClass.FrmInitialize(this); } private void panel_Title_MouseDown(object sender, MouseEventArgs e) { int Tem_Y = 0; if (e.Button == MouseButtons.Left) //按下的是否为鼠标左键 { Cla_FrmClass.FrmBackCheck(); //检测各窗体是否连在一起 Tem_Y = e.Y; FrmClass.FrmPoint = new Point(e.X, Tem_Y); //获取鼠标在窗体上的位置，用于磁性窗体 FrmClass.CPoint = new Point(-e.X, -Tem_Y); //获取鼠标在屏幕上的位置，用于窗体的移动 if (FrmClass.Example_List_AdhereTo) //如果与frm_ListBox窗体相连接 { Cla_FrmClass.FrmDistanceJob(this, F_List); //计算窗体的距离差 if (FrmClass.Example_Assistant_AdhereTo) //两个辅窗体是否连接在一起 { Cla_FrmClass.FrmDistanceJob(this, F_Libretto); //计算窗体的距离差 } } if (FrmClass.Example_Libretto_AdhereTo) //如果与frm_Libretto窗体相连接 { Cla_FrmClass.FrmDistanceJob(this, F_Libretto); //计算窗体的距离差 if (FrmClass.Example_Assistant_AdhereTo) //两个辅窗体是否连接在一起 { Cla_FrmClass.FrmDistanceJob(this, F_List); //计算窗体的距离差 } } } } private void panel_Title_MouseMove(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) //按下的是否为鼠标左键 { Cla_FrmClass.FrmMove(this, e); //利用控件移动窗体 if (FrmClass.Example_List_AdhereTo) //如果frm_ListBox窗体与主窗体连接 { Cla_FrmClass.ManyFrmMove(this, e, F_List); //磁性窗体的移动 Cla_FrmClass.FrmInitialize(F_List); //对frm_ListBox窗体的位置进行初始化 if (FrmClass.Example_Assistant_AdhereTo) //如果两个子窗体连接在一起 { Cla_FrmClass.ManyFrmMove(this, e, F_Libretto); Cla_FrmClass.FrmInitialize(F_Libretto); } } if (FrmClass.Example_Libretto_AdhereTo) //如果frm_Libretto窗体与主窗体连接 { Cla_FrmClass.ManyFrmMove(this, e, F_Libretto); Cla_FrmClass.FrmInitialize(F_Libretto); if (FrmClass.Example_Assistant_AdhereTo) { Cla_FrmClass.ManyFrmMove(this, e, F_List); Cla_FrmClass.FrmInitialize(F_List); } } Cla_FrmClass.FrmInitialize(this); } } private void panel_Title_MouseUp(object sender, MouseEventArgs e) { Cla_FrmClass.FrmPlace(this); } private void Frm_Play_Shown(object sender, EventArgs e) { //显示列表窗体 F_List = new Frm_ListBox(); F_List.ShowInTaskbar = false; FrmClass.Example_ListShow = true; F_List.Show(); //显示歌词窗体 F_Libretto = new Frm_Libretto(); F_Libretto.ShowInTaskbar = false; FrmClass.Example_LibrettoShow = true; F_Libretto.Show(); F_Libretto.Left = this.Left + this.Width; F_Libretto.Top = this.Top; //各窗体位置的初始化 Cla_FrmClass.FrmInitialize(F_List); Cla_FrmClass.FrmInitialize(F_Libretto); } private void panel_Close_Click(object sender, EventArgs e) { F_List.Close(); F_List.Dispose(); F_Libretto.Close(); F_Libretto.Dispose(); F_Screen.Close(); F_Screen.Dispose(); this.Close(); } private void panel_Title_Click(object sender, EventArgs e) { F_List.Focus(); F_Libretto.Focus(); this.Focus(); }}class FrmClass{ #region 磁性窗体-公共变量 //记录窗体的隐藏与显示 public static bool Example_ListShow = false; public static bool Example_LibrettoShow = false; public static bool Example_ScreenShow = false; //记录鼠标的当前位置 public static Point CPoint; //添加命名空间using System.Drawing; public static Point FrmPoint; public static int Example_FSpace = 10; //设置窗体间的距离 //Frm_Play窗体的位置及大小 public static int Example_Play_Top = 0; public static int Example_Play_Left = 0; public static int Example_Play_Width = 0; public static int Example_Play_Height = 0; public static bool Example_Assistant_AdhereTo = false; //辅助窗体是否磁性在一起 //Frm_ListBos窗体的位置及大小 public static int Example_List_Top = 0; public static int Example_List_Left = 0; public static int Example_List_Width = 0; public static int Example_List_Height = 0; public static bool Example_List_AdhereTo = false; //辅助窗体是否与主窗体磁性在一起 //Frm_Libretto窗体的位置及大小 public static int Example_Libretto_Top = 0; public static int Example_Libretto_Left = 0; public static int Example_Libretto_Width = 0; public static int Example_Libretto_Height = 0; public static bool Example_Libretto_AdhereTo = false; //辅助窗体是否与主窗体磁性在一起 //窗体之间的距离差 public static int Example_List_space_Top = 0; public static int Example_List_space_Left = 0; public static int Example_Libretto_space_Top = 0; public static int Example_Libretto_space_Left = 0; #endregion #region 检测各窗体是否连接在一起 /// <summary> /// 检测各窗体是否连接在一起 /// </summary> public void FrmBackCheck() { bool Tem_Magnetism = false; //Frm_ListBos与主窗体 Tem_Magnetism = false; if ((Example_Play_Top - Example_List_Top) == 0) Tem_Magnetism = true; if ((Example_Play_Left - Example_List_Left) == 0) Tem_Magnetism = true; if ((Example_Play_Left - Example_List_Left - Example_List_Width) == 0) Tem_Magnetism = true; if ((Example_Play_Left - Example_List_Left + Example_List_Width) == 0) Tem_Magnetism = true; if ((Example_Play_Top - Example_List_Top - Example_List_Height) == 0) Tem_Magnetism = true; if ((Example_Play_Top - Example_List_Top + Example_List_Height) == 0) Tem_Magnetism = true; if (Tem_Magnetism) Example_List_AdhereTo = true; //Frm_Libretto与主窗体 Tem_Magnetism = false; if ((Example_Play_Top - Example_Libretto_Top) == 0) Tem_Magnetism = true; if ((Example_Play_Left - Example_Libretto_Left) == 0) Tem_Magnetism = true; if ((Example_Play_Left - Example_Libretto_Left - Example_Libretto_Width) == 0) Tem_Magnetism = true; if ((Example_Play_Left - Example_Libretto_Left + Example_Libretto_Width) == 0) Tem_Magnetism = true; if ((Example_Play_Top - Example_Libretto_Top - Example_Libretto_Height) == 0) Tem_Magnetism = true; if ((Example_Play_Top - Example_Libretto_Top + Example_Libretto_Height) == 0) Tem_Magnetism = true; if (Tem_Magnetism) Example_Libretto_AdhereTo = true; //两个辅窗体 Tem_Magnetism = false; if ((Example_List_Top - Example_Libretto_Top) == 0) Tem_Magnetism = true; if ((Example_List_Left - Example_Libretto_Left) == 0) Tem_Magnetism = true; if ((Example_List_Left - Example_Libretto_Left - Example_Libretto_Width) == 0) Tem_Magnetism = true; if ((Example_List_Left - Example_Libretto_Left + Example_Libretto_Width) == 0) Tem_Magnetism = true; if ((Example_List_Top - Example_Libretto_Top - Example_Libretto_Height) == 0) Tem_Magnetism = true; if ((Example_List_Top - Example_Libretto_Top + Example_Libretto_Height) == 0) Tem_Magnetism = true; if (Tem_Magnetism) Example_Assistant_AdhereTo = true; } #endregion #region 利用窗体上的控件移动窗体 /// <summary> /// 利用控件移动窗体 /// </summary> /// <param Frm="Form">窗体</param> /// <param e="MouseEventArgs">控件的移动事件</param> public void FrmMove(Form Frm, MouseEventArgs e) //Form或MouseEventArgs添加命名空间using System.Windows.Forms; { if (e.Button == MouseButtons.Left) { Point myPosittion = Control.MousePosition; //获取当前鼠标的屏幕坐标 myPosittion.Offset(CPoint.X, CPoint.Y); //重载当前鼠标的位置 Frm.DesktopLocation = myPosittion; //设置当前窗体在屏幕上的位置 } } #endregion #region 计算窗体之间的距离差 /// <summary> /// 计算窗体之间的距离差 /// </summary> /// <param Frm="Form">窗体</param> /// <param Follow="Form">跟随窗体</param> public void FrmDistanceJob(Form Frm, Form Follow) { switch (Follow.Name) { case "Frm_ListBox": { Example_List_space_Top = Follow.Top - Frm.Top; Example_List_space_Left = Follow.Left - Frm.Left; break; } case "Frm_Libretto": { Example_Libretto_space_Top = Follow.Top - Frm.Top; Example_Libretto_space_Left = Follow.Left - Frm.Left; break; } } } #endregion #region 磁性窗体的移动 /// <summary> /// 磁性窗体的移动 /// </summary> /// <param Frm="Form">窗体</param> /// <param e="MouseEventArgs">控件的移动事件</param> /// <param Follow="Form">跟随窗体</param> public void ManyFrmMove(Form Frm, MouseEventArgs e, Form Follow) //Form或MouseEventArgs添加命名空间using System.Windows.Forms; { if (e.Button == MouseButtons.Left) { int Tem_Left = 0; int Tem_Top = 0; Point myPosittion = Control.MousePosition; //获取当前鼠标的屏幕坐标 switch (Follow.Name) { case "Frm_ListBox": { Tem_Top = Example_List_space_Top - FrmPoint.Y; Tem_Left = Example_List_space_Left - FrmPoint.X; break; } case "Frm_Libretto": { Tem_Top = Example_Libretto_space_Top - FrmPoint.Y; Tem_Left = Example_Libretto_space_Left - FrmPoint.X; break; } } myPosittion.Offset(Tem_Left, Tem_Top); Follow.DesktopLocation = myPosittion; } } #endregion #region 对窗体的位置进行初始化 /// <summary> /// 对窗体的位置进行初始化 /// </summary> /// <param Frm="Form">窗体</param> public void FrmInitialize(Form Frm) { switch (Frm.Name) { case "Frm_Play": { Example_Play_Top = Frm.Top; Example_Play_Left = Frm.Left; Example_Play_Width = Frm.Width; Example_Play_Height = Frm.Height; break; } case "Frm_ListBox": { Example_List_Top = Frm.Top; Example_List_Left = Frm.Left; Example_List_Width = Frm.Width; Example_List_Height = Frm.Height; break; } case "Frm_Libretto": { Example_Libretto_Top = Frm.Top; Example_Libretto_Left = Frm.Left; Example_Libretto_Width = Frm.Width; Example_Libretto_Height = Frm.Height; break; } } } #endregion #region 存储各窗体的当前信息 /// <summary> /// 存储各窗体的当前信息 /// </summary> /// <param Frm="Form">窗体</param> /// <param e="MouseEventArgs">控件的移动事件</param> public void FrmPlace(Form Frm) { FrmInitialize(Frm); FrmMagnetism(Frm); } #endregion #region 窗体的磁性设置 /// <summary> /// 窗体的磁性设置 /// </summary> /// <param Frm="Form">窗体</param> public void FrmMagnetism(Form Frm) { if (Frm.Name != "Frm_Play") { FrmMagnetismCount(Frm, Example_Play_Top, Example_Play_Left, Example_Play_Width, Example_Play_Height, "Frm_Play"); } if (Frm.Name != "Frm_ListBos") { FrmMagnetismCount(Frm, Example_List_Top, Example_List_Left, Example_List_Width, Example_List_Height, "Frm_ListBos"); } if (Frm.Name != "Frm_Libratto") { FrmMagnetismCount(Frm, Example_Libretto_Top, Example_Libretto_Left, Example_Libretto_Width, Example_Libretto_Height, "Frm_Libratto"); } FrmInitialize(Frm); } #endregion #region 磁性窗体的计算 /// <summary> /// 磁性窗体的计算 /// </summary> /// <param Frm="Form">窗体</param> /// <param e="MouseEventArgs">控件的移动事件</param> public void FrmMagnetismCount(Form Frm, int top, int left, int width, int height, string Mforms) { bool Tem_Magnetism = false; //判断是否有磁性发生 string Tem_MainForm = ""; //临时记录主窗体 string Tem_AssistForm = ""; //临时记录辅窗体 //上面进行磁性窗体 if ((Frm.Top + Frm.Height - top) <= Example_FSpace && (Frm.Top + Frm.Height - top) >= -Example_FSpace) { //当一个主窗体不包含辅窗体时 if ((Frm.Left >= left && Frm.Left <= (left + width)) || ((Frm.Left + Frm.Width) >= left && (Frm.Left + Frm.Width) <= (left + width))) { Frm.Top = top - Frm.Height; if ((Frm.Left - left) <= Example_FSpace && (Frm.Left - left) >= -Example_FSpace) Frm.Left = left; Tem_Magnetism = true; } //当一个主窗体包含辅窗体时 if (Frm.Left <= left && (Frm.Left + Frm.Width) >= (left + width)) { Frm.Top = top - Frm.Height; if ((Frm.Left - left) <= Example_FSpace && (Frm.Left - left) >= -Example_FSpace) Frm.Left = left; Tem_Magnetism = true; } } //下面进行磁性窗体 if ((Frm.Top - (top + height)) <= Example_FSpace && (Frm.Top - (top + height)) >= -Example_FSpace) { //当一个主窗体不包含辅窗体时 if ((Frm.Left >= left && Frm.Left <= (left + width)) || ((Frm.Left + Frm.Width) >= left && (Frm.Left + Frm.Width) <= (left + width))) { Frm.Top = top + height; if ((Frm.Left - left) <= Example_FSpace && (Frm.Left - left) >= -Example_FSpace) Frm.Left = left; Tem_Magnetism = true; } //当一个主窗体包含辅窗体时 if (Frm.Left <= left && (Frm.Left + Frm.Width) >= (left + width)) { Frm.Top = top + height; if ((Frm.Left - left) <= Example_FSpace && (Frm.Left - left) >= -Example_FSpace) Frm.Left = left; Tem_Magnetism = true; } } //左面进行磁性窗体 if ((Frm.Left + Frm.Width - left) <= Example_FSpace && (Frm.Left + Frm.Width - left) >= -Example_FSpace) { //当一个主窗体不包含辅窗体时 if ((Frm.Top > top && Frm.Top <= (top + height)) || ((Frm.Top + Frm.Height) >= top && (Frm.Top + Frm.Height) <= (top + height))) { Frm.Left = left - Frm.Width; if ((Frm.Top - top) <= Example_FSpace && (Frm.Top - top) >= -Example_FSpace) Frm.Top = top; Tem_Magnetism = true; } //当一个主窗体包含辅窗体时 if (Frm.Top <= top && (Frm.Top + Frm.Height) >= (top + height)) { Frm.Left = left - Frm.Width; if ((Frm.Top - top) <= Example_FSpace && (Frm.Top - top) >= -Example_FSpace) Frm.Top = top; Tem_Magnetism = true; } } //右面进行磁性窗体 if ((Frm.Left - (left + width)) <= Example_FSpace && (Frm.Left - (left + width)) >= -Example_FSpace) { //当一个主窗体不包含辅窗体时 if ((Frm.Top > top && Frm.Top <= (top + height)) || ((Frm.Top + Frm.Height) >= top && (Frm.Top + Frm.Height) <= (top + height))) { Frm.Left = left + width; if ((Frm.Top - top) <= Example_FSpace && (Frm.Top - top) >= -Example_FSpace) Frm.Top = top; Tem_Magnetism = true; } //当一个主窗体包含辅窗体时 if (Frm.Top <= top && (Frm.Top + Frm.Height) >= (top + height)) { Frm.Left = left + width; if ((Frm.Top - top) <= Example_FSpace && (Frm.Top - top) >= -Example_FSpace) Frm.Top = top; Tem_Magnetism = true; } } if (Frm.Name == "Frm_Play") Tem_MainForm = "Frm_Play"; else Tem_AssistForm = Frm.Name; if (Mforms == "Frm_Play") Tem_MainForm = "Frm_Play"; else Tem_AssistForm = Mforms; if (Tem_MainForm == "") { Example_Assistant_AdhereTo = Tem_Magnetism; } else { switch (Tem_AssistForm) { case "Frm_ListBos": Example_List_AdhereTo = Tem_Magnetism; break; case "Frm_Libratto": Example_Libretto_AdhereTo = Tem_Magnetism; break; } } } #endregion #region 恢复窗体的初始大小 /// <summary> /// 恢复窗体的初始大小(当松开鼠标时，如果窗体的大小小于300*200,恢复初始状态) /// </summary> /// <param Frm="Form">窗体</param> public void FrmScreen_FormerlySize(Form Frm, int PWidth, int PHeight) { if (Frm.Width < PWidth || Frm.Height < PHeight) { Frm.Width = PWidth; Frm.Height = PHeight; //Example_Size = false; } } #endregion}static class Program{ /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Frm_Play()); }}关于“基于C#如何实现磁性吸附窗体”这篇文章的内容就介绍到这里，感谢各位的阅读！相信大家对“基于C#如何实现磁性吸附窗体”知识都有一定的了解，大家如果还想学习更多知识，欢迎关注编程网行业资讯频道。
