詳解C#如何手動改變自制窗體的大小
更新時間：2024年03月26日 08:26:46 作者：wenchm
這篇文章主要為大家詳細介紹了在C#中如何實現(xiàn)手動改變自制窗體的大小,文中的示例代碼講解詳細,感興趣的小伙伴可以跟隨小編一起學習一下
當用戶去除Winform窗體邊框，自行設置窗體外觀時，用戶就不能使用Windows窗體應用的功能對自定義窗體的大小進行隨意改變了。
此時手動改變無邊框窗體的大小需要自定義改變窗體大小的方法，才能實現(xiàn)通過鼠標拖拽自定義窗體的右邊、下邊、右下角改變窗體的大小。改變自制窗體的大小時，主要用到了Cursor類的Position屬性以及窗體的Width、Height、Top和Left屬性，另外，還用到了改變窗體大小的計算方法。
1.Cursor類的Position屬性
Cursor類代表用于繪制鼠標指針的圖像，其Position屬性用于獲取或設置光標位置。該屬性的語法格式如下：
public static Point Position {get;set;}
參數(shù)說明
屬性值：代表光標位置的Point(采用屏幕坐標)結構。
2.改變窗體大小的計算方法
重要的算法就是如何根據(jù)鼠標的移動來設置窗體的大小：首先，用當前鼠標在屏幕上的X坐標值減去窗體左邊距與屏幕左邊距的距離，然后再加上鼠標與邊框右端的距離，并將值設為當前窗體的寬度。實現(xiàn)代碼如下：
Form.Width =Cursor.Position.X-Frm.Left+(Pan.Width -Example_X);
其中，F(xiàn)orm為窗體名稱，Pan為顯示窗體邊框的控件名稱，Example_X為鼠標按下時的X坐標值。說明：以上計算方法是在Panel控件的MouseMove事件中執(zhí)行的。
3.Resources設計
（1）Resources資源圖片管理
（2）GetObject方法設計
圖片資源的屬性是自動生成的，但是在程序中獲取或加載圖片的GetObject方法需要手動設計進Resources.Designer.cs中。
internal static Image GetObject(string v)
{
return v switch
{
"panel_TitleLeft" => panel_TitleLeft,
"panel_TitleMiddle" => panel_TitleMiddle,
"panel_TitleRight" => panel_TitleRight,
"panel_Left" => panel_Left,
"panel_Right" => panel_Right,
"panel_BottomLeft" => panel_BottomLeft,
"panel_BottomMiddle" => panel_BottomMiddle,
"panel_BottomRight" => panel_BottomRight,
"pictureBox1_Image" => pictureBox1_Image,
_ => null
};
}// Resources.Designer.cs
//------------------------------------------------------------------------------
// <auto-generated>
// 此代碼由工具生成。
// 運行時版本:4.0.30319.42000
//
// 對此文件的更改可能會導致不正確的行為，并且如果
// 重新生成代碼，這些更改將會丟失。
// </auto-generated>
//------------------------------------------------------------------------------
namespace _164.Properties {
using System;
/// <summary>
/// 一個強類型的資源類，用于查找本地化的字符串等。
/// </summary>
// 此類是由 StronglyTypedResourceBuilder
// 類通過類似于 ResGen 或 Visual Studio 的工具自動生成的。
// 若要添加或移除成員，請編輯 .ResX 文件，然后重新運行 ResGen
// (以 /str 作為命令選項)，或重新生成 VS 項目。
[global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "17.0.0.0")]
[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
[global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
internal class Resources {
private static global::System.Resources.ResourceManager resourceMan;
private static global::System.Globalization.CultureInfo resourceCulture;
[global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
internal Resources() {
}
/// <summary>
/// 返回此類使用的緩存的 ResourceManager 實例。
/// </summary>
[global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
internal static global::System.Resources.ResourceManager ResourceManager {
get {
if (object.ReferenceEquals(resourceMan, null)) {
global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("_164.Properties.Resources", typeof(Resources).Assembly);
resourceMan = temp;
}
return resourceMan;
}
}
/// <summary>
/// 重寫當前線程的 CurrentUICulture 屬性，對
/// 使用此強類型資源類的所有資源查找執(zhí)行重寫。
/// </summary>
[global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
internal static global::System.Globalization.CultureInfo Culture {
get {
return resourceCulture;
}
set {
resourceCulture = value;
}
}
/// <summary>
/// 查找 System.Drawing.Bitmap 類型的本地化資源。
/// </summary>
internal static System.Drawing.Bitmap panel_BottomLeft {
get {
object obj = ResourceManager.GetObject("panel_BottomLeft", resourceCulture);
return ((System.Drawing.Bitmap)(obj));
}
}
/// <summary>
/// 查找 System.Drawing.Bitmap 類型的本地化資源。
/// </summary>
internal static System.Drawing.Bitmap panel_BottomMiddle {
get {
object obj = ResourceManager.GetObject("panel_BottomMiddle", resourceCulture);
return ((System.Drawing.Bitmap)(obj));
}
}
/// <summary>
/// 查找 System.Drawing.Bitmap 類型的本地化資源。
/// </summary>
internal static System.Drawing.Bitmap panel_BottomRight {
get {
object obj = ResourceManager.GetObject("panel_BottomRight", resourceCulture);
return ((System.Drawing.Bitmap)(obj));
}
}
/// <summary>
/// 查找 System.Drawing.Bitmap 類型的本地化資源。
/// </summary>
internal static System.Drawing.Bitmap panel_Left {
get {
object obj = ResourceManager.GetObject("panel_Left", resourceCulture);
return ((System.Drawing.Bitmap)(obj));
}
}
/// <summary>
/// 查找 System.Drawing.Bitmap 類型的本地化資源。
/// </summary>
internal static System.Drawing.Bitmap panel_Right {
get {
object obj = ResourceManager.GetObject("panel_Right", resourceCulture);
return ((System.Drawing.Bitmap)(obj));
}
}
/// <summary>
/// 查找 System.Drawing.Bitmap 類型的本地化資源。
/// </summary>
internal static System.Drawing.Bitmap panel_TitleLeft {
get {
object obj = ResourceManager.GetObject("panel_TitleLeft", resourceCulture);
return ((System.Drawing.Bitmap)(obj));
}
}
/// <summary>
/// 查找 System.Drawing.Bitmap 類型的本地化資源。
/// </summary>
internal static System.Drawing.Bitmap panel_TitleMiddle {
get {
object obj = ResourceManager.GetObject("panel_TitleMiddle", resourceCulture);
return ((System.Drawing.Bitmap)(obj));
}
}
/// <summary>
/// 查找 System.Drawing.Bitmap 類型的本地化資源。
/// </summary>
internal static System.Drawing.Bitmap panel_TitleRight {
get {
object obj = ResourceManager.GetObject("panel_TitleRight", resourceCulture);
return ((System.Drawing.Bitmap)(obj));
}
}
/// <summary>
/// 查找 System.Drawing.Bitmap 類型的本地化資源。
/// </summary>
internal static System.Drawing.Bitmap pictureBox1_Image {
get {
object obj = ResourceManager.GetObject("pictureBox1_Image", resourceCulture);
return ((System.Drawing.Bitmap)(obj));
}
}
internal static Image GetObject(string v)
{
return v switch
{
"panel_TitleLeft" => panel_TitleLeft,
"panel_TitleMiddle" => panel_TitleMiddle,
"panel_TitleRight" => panel_TitleRight,
"panel_Left" => panel_Left,
"panel_Right" => panel_Right,
"panel_BottomLeft" => panel_BottomLeft,
"panel_BottomMiddle" => panel_BottomMiddle,
"panel_BottomRight" => panel_BottomRight,
"pictureBox1_Image" => pictureBox1_Image,
_ => null
};
}
}
}
4.示例
// 手動改變自制窗體的大小
using _164.Properties;
namespace _164
{
public partial class Form1 : Form
{
private Panel? panel_BR;
private Panel? panel_Center;
private Panel? panel_TitleRight;
private Panel? panel_BottomLeft;
private Panel? panel_BottomMiddle;
private PictureBox? pictureBox1;
private Panel? panel_TitleLeft;
private Panel? panel_Right;
private Panel? panel_Left;
private Panel? panel_Title;
private Panel? panel_Bottom;
private Panel? panel_TitleMiddle;
private static int example_X = 0;
private static int example_Y = 0;
private static int example_W = 0;
private static Point cPoint;
public static int Example_X { get => example_X; set => example_X = value; }
public static int Example_Y { get => example_Y; set => example_Y = value; }
public static int Example_W { get => example_W; set => example_W = value; }
public static Point CPoint { get => cPoint; set => cPoint = value; }
public Form1()
{
InitializeComponent();
Load += Form1_Load;
}
private void Form1_Load(object? sender, EventArgs e)
{
//
// panel_Right
//
panel_Right = new Panel
{
BackColor = Color.Transparent,
BackgroundImage = Resources.GetObject("panel_Right")!,
BackgroundImageLayout = ImageLayout.Stretch,
Cursor = Cursors.SizeWE,
Dock = DockStyle.Right,
Location = new Point(286, 19),
Name = "panel_Right",
Size = new Size(6, 96),
TabIndex = 10
};
panel_Right.MouseDown += new MouseEventHandler(Panel_Right_MouseDown!);
panel_Right.MouseMove += new MouseEventHandler(Panel_Right_MouseMove!);
//
// panel_Left
//
panel_Left = new Panel
{
BackColor = Color.Transparent,
BackgroundImage = Resources.GetObject("panel_Left")!,
BackgroundImageLayout = ImageLayout.Stretch,
Dock = DockStyle.Left,
Location = new Point(0, 19),
Name = "panel_Left",
Size = new Size(6, 96),
TabIndex = 9
};
panel_Left.MouseDown += new MouseEventHandler(Panel_Right_MouseDown!);
panel_Left.MouseMove += new MouseEventHandler(Panel_Right_MouseMove!);
//
// panel_Center
//
panel_Center = new Panel
{
BackColor = Color.Honeydew,
Dock = DockStyle.Fill,
Location = new Point(6, 19),
Name = "panel_Center",
Size = new Size(280, 96),
TabIndex = 13
};
//
// panel_TitleRight
//
panel_TitleRight = new Panel
{
BackColor = Color.Transparent,
BackgroundImage = Resources.GetObject("panel_TitleRight")!,
BackgroundImageLayout = ImageLayout.Stretch,
Dock = DockStyle.Right,
Location = new Point(284, 0),
Name = "panel_TitleRight",
Size = new Size(8, 19),
TabIndex = 1,
Tag = "3"
};
panel_TitleRight.MouseDown += new MouseEventHandler(Panel_TitleLeft_MouseDown!);
panel_TitleRight.MouseMove += new MouseEventHandler(Panel_TitleLeft_MouseMove!);
//
// panel_TitleMiddle
//
panel_TitleMiddle = new Panel
{
BackColor = Color.Transparent,
BackgroundImage = Resources.GetObject("panel_TitleMiddle")!,
BackgroundImageLayout = ImageLayout.Stretch,
Dock = DockStyle.Fill,
Location = new Point(12, 0),
Name = "panel_TitleMiddle",
Size = new Size(272, 19),
TabIndex = 2,
Tag = "2"
};
panel_TitleMiddle.Controls.Add(pictureBox1);
panel_TitleMiddle.MouseDown += new MouseEventHandler(Panel_TitleLeft_MouseDown!);
panel_TitleMiddle.MouseMove += new MouseEventHandler(Panel_TitleLeft_MouseMove!);
panel_TitleMiddle.SuspendLayout();
//
// pictureBox1
//
pictureBox1 = new PictureBox
{
Anchor = AnchorStyles.Top | AnchorStyles.Right,
BackColor = Color.Transparent,
Cursor = Cursors.Hand,
Image = Resources.GetObject("pictureBox1.Image")!,
SizeMode = PictureBoxSizeMode.StretchImage,
Location = new Point(260, 3),
Name = "pictureBox1",
Size = new Size(11, 11),
TabIndex = 0,
TabStop = false,
Tag = "11"
};
pictureBox1.Click += new EventHandler(PictureBox1_Click!);
//
// panel_TitleLeft
//
panel_TitleLeft = new Panel
{
BackColor = Color.Transparent,
BackgroundImage = Resources.GetObject("panel_TitleLeft")!,
BackgroundImageLayout = ImageLayout.Stretch,
Dock = DockStyle.Left,
Location = new Point(0, 0),
Name = "panel_TitleLeft",
Size = new Size(12, 19),
TabIndex = 0,
Tag = "1"
};
panel_TitleLeft.MouseDown += new MouseEventHandler(Panel_TitleLeft_MouseDown!);
panel_TitleLeft.MouseMove += new MouseEventHandler(Panel_TitleLeft_MouseMove!);
//
// panel_BottomLeft
//
panel_BottomLeft = new Panel
{
BackColor = Color.Transparent,
BackgroundImage =Resources.GetObject("panel_BottomLeft")!,
BackgroundImageLayout = ImageLayout.Stretch,
Cursor = Cursors.SizeNS,
Dock = DockStyle.Left,
Location = new Point(0, 0),
Name = "panel_BottomLeft",
Size = new Size(8, 10),
TabIndex = 0
};
//
// panel_BottomMiddle
//
panel_BottomMiddle = new Panel
{
BackColor = Color.Transparent,
BackgroundImage = Resources.GetObject("panel_BottomMiddle")!,
BackgroundImageLayout = ImageLayout.Stretch,
Cursor = Cursors.SizeNS,
Dock = DockStyle.Fill,
Location = new Point(8, 0),
Name = "panel_Bn",
Size = new Size(276, 10),
TabIndex = 2
};
panel_BottomMiddle.MouseDown += new MouseEventHandler(Panel_Right_MouseDown!);
panel_BottomMiddle.MouseMove += new MouseEventHandler(Panel_Right_MouseMove!);
//
// panel_BottomRight
//
panel_BR = new Panel
{
BackColor = Color.Transparent,
BackgroundImage = Resources.GetObject("panel_BottomRight")!,
BackgroundImageLayout = ImageLayout.Stretch,
Cursor = Cursors.SizeNWSE,
Dock = DockStyle.Right,
Location = new Point(284, 0),
Name = "panel_BR",
Size = new Size(8, 10),
TabIndex = 1
};
panel_BR.MouseDown += new MouseEventHandler(Panel_Right_MouseDown!);
panel_BR.MouseMove += new MouseEventHandler(Panel_Right_MouseMove!);
//
// panel_Title
//
panel_Title = new Panel
{
BackColor = Color.Transparent,
Dock = DockStyle.Top,
Location = new Point(0, 0),
Name = "panel_Title",
Size = new Size(292, 19),
TabIndex = 7
};
panel_Title.Controls.Add(panel_TitleMiddle);
panel_Title.Controls.Add(panel_TitleRight);
panel_Title.Controls.Add(panel_TitleLeft);
panel_Title.SuspendLayout();
//
// panel_Bottom
//
panel_Bottom = new Panel
{
BackColor = Color.Transparent,
Dock = DockStyle.Bottom,
Location = new Point(0, 115),
Name = "panel_Bottom",
Size = new Size(292, 10),
TabIndex = 8
};
panel_Bottom.Controls.Add(panel_BottomMiddle);
panel_Bottom.Controls.Add(panel_BR);
panel_Bottom.Controls.Add(panel_BottomLeft);
panel_Bottom.SuspendLayout();
//
// Form1
//
AutoScaleDimensions = new SizeF(6F, 12F);
AutoScaleMode = AutoScaleMode.Font;
ClientSize = new Size(292, 125);
Controls.Add(panel_Center);
Controls.Add(panel_Right);
Controls.Add(panel_Left);
Controls.Add(panel_Title);
Controls.Add(panel_Bottom);
FormBorderStyle = FormBorderStyle.None;
Name = "Form1";
Text = "Form1";
panel_BottomMiddle.ResumeLayout(false);
panel_Title.ResumeLayout(false);
panel_Bottom.ResumeLayout(false);
}
#region 利用窗體上的控件移動窗體
/// <summary>
/// 利用控件移動窗體
/// </summary>
/// <param Frm="Form">窗體</param>
/// <param e="MouseEventArgs">控件的移動事件</param>
public static void FormMove(Form Frm, MouseEventArgs e) //Form或MouseEventArgs添加命名空間using System.Windows.Forms;
{
if (e.Button == MouseButtons.Left)
{
Point myPosittion = Control.MousePosition;//獲取當前鼠標的屏幕坐標
myPosittion.Offset(CPoint.X, CPoint.Y);//重載當前鼠標的位置
Frm.DesktopLocation = myPosittion;//設置當前窗體在屏幕上的位置
}
}
#endregion
#region 獲取鼠標的當前位置
/// <summary>
/// 獲取鼠標的當前位置
/// </summary>
/// <param Frm="Form">窗體</param>
/// <param e="MouseEventArgs">窗體上有關鼠標的一些信息</param>
public static void FormScreenSizeInfo(Form Frm, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
Example_X = e.X;
Example_Y = e.Y;
Example_W = Frm.Width;
}
}
#endregion
#region 改變窗體的大小(用于鼠標的移動事件)
/// <summary>
/// 改變窗體的大小(用于鼠標的移動事件)
/// </summary>
/// <param Frm="Form">窗體</param>
/// <param Pan="Panel">設置窗體邊框的控件</param>
/// <param e="MouseEventArgs">窗體上有關鼠標的一些信息</param>
public void FormScreen_EnlargeSize(Form Frm, Panel Pan, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
switch (Pan.Name)
{
case "panel_Right": //如果移動的是窗體的右邊框
{
if (Width <= 70) //如果窗體的寬度小于等于70
{
Frm.Width = 70; //設置窗體的寬度為70
//如果用鼠標向右移動窗體的右邊框
if (Cursor.Position.X - Frm.Left + (Pan.Width - Example_X) > Frm.Width)
{
//根據(jù)鼠標的移動值，增加窗體的寬度
Frm.Width = Cursor.Position.X - Frm.Left + (Pan.Width - Example_X);
}
break;
}
//根據(jù)鼠標的移動值，增加窗體的寬度
Frm.Width = Cursor.Position.X - Frm.Left + (Pan.Width - Example_X);
break;
}
case "panel_BR": //如果移動的是窗體的右下角
{
//如果窗體的大小不為窗體大小的最小值
if (Width > 70 && Height > (panel_Title!.Height + panel_BottomMiddle!.Height + 1))
{
//根據(jù)鼠標的移動改變窗體的大小
Frm.Height = Cursor.Position.Y - Frm.Top + (Pan.Height - Example_Y);
Frm.Width = Cursor.Position.X - Frm.Left + (Pan.Width - Example_X);
}
else
{
if (Width <= 70) //如果窗體的寬度小于等于最小值
{
Frm.Width = 70; //設置窗體的寬度為70
if (Height <= (panel_Title!.Height + panel_BottomMiddle!.Height + 1))//如果窗體的高小于最小值
{
Frm.Height = panel_Title.Height + panel_BottomMiddle.Height + 1;//設置窗體的最小高度
//如果用鼠標向下移動窗體的底邊框
if (Cursor.Position.Y - Frm.Top + (Pan.Height - Example_Y) > Frm.Height)
{
//根據(jù)鼠標的移動值，增加窗體的高度
Frm.Height = Cursor.Position.Y - Frm.Top + (Pan.Height - Example_Y);
}
break;
}
//如果用鼠標向右移動窗體
if (Cursor.Position.X - Frm.Left + (Pan.Width - Example_X) > Frm.Width)
{
//增加窗體的寬度
Frm.Width = Cursor.Position.X - Frm.Left + (Pan.Width - Example_X);
}
break;
}
if (Height <= (panel_Title!.Height + panel_BottomMiddle!.Height + 1))//如果窗體的高度小于等于最小值
{
Frm.Height = panel_Title.Height + panel_BottomMiddle.Height + 1;//設置窗體的高度為最小值
Frm.Width = Cursor.Position.X - Frm.Left + (Pan.Width - Example_X);//改變窗體的寬度
//如果用鼠標向下移動窗體的邊框
if (Cursor.Position.Y - Frm.Top + (Pan.Height - Example_Y) > Frm.Height)
{
Frm.Height = Cursor.Position.Y - Frm.Top + (Pan.Height - Example_Y);//增加窗體的高度
}
break;
}
}
break;
}
case "panel_Bn"://如果移動的是窗體的底邊框
{
if (Height <= (panel_Title!.Height + panel_BottomMiddle!.Height + 1))//如果窗體的高度小于等于最小值
{
Frm.Height = panel_Title.Height + panel_BottomMiddle.Height + 1;//設置窗體的高度為最小值
//如果用鼠標向下移動窗體的下邊框
if (Cursor.Position.Y - Frm.Top + (Pan.Height - Example_Y) > Frm.Height)
{
Frm.Height = Cursor.Position.Y - Frm.Top + (Pan.Height - Example_Y); //增加窗體的高度
}
break;
}
Frm.Height = Cursor.Position.Y - Frm.Top + (Pan.Height - Example_Y); //增加窗體的高度
break;
}
}
}
}
#endregion
private void Panel_Right_MouseDown(object sender, MouseEventArgs e)
{
FormScreenSizeInfo(this, e);//獲取鼠標的當前位置
}
private void Panel_Right_MouseMove(object sender, MouseEventArgs e)
{
FormScreen_EnlargeSize(this, (Panel)sender, e);//改變窗體的大小
}
private void PictureBox1_Click(object sender, EventArgs e)
{
Close();
}
private void Panel_TitleLeft_MouseDown(object sender, MouseEventArgs e)
{
int Tem_X = -e.X;
if (Convert.ToInt16(((Panel)sender).Tag!.ToString()) == 2)//如果移動的是標題欄的中間部分
Tem_X = -e.X - panel_TitleLeft!.Width;
if (Convert.ToInt16(((Panel)sender).Tag!.ToString()) == 3)//如果移動的是標題欄的尾端
Tem_X = -(Width - ((Panel)sender).Width) - e.X;
CPoint = new Point(Tem_X, -e.Y);
}
private void Panel_TitleLeft_MouseMove(object sender, MouseEventArgs e)
{
FormMove(this, e);
}
}
}到此這篇關于詳解C#如何手動改變自制窗體的大小的文章就介紹到這了,更多相關C#手動改變窗體大小內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關文章希望大家以后多多支持腳本之家！
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