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?。菏紫龋卯斍笆髽嗽谄聊簧系腦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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