C# Winform 窗体用鼠标拖出虚线框....并且虚线框区域里的所有控件选中
c#需要框选多个控件的一般方法
新建form2 代码如下
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace Win
{
public partial class Form2 : Form
{
bool MouseIsDown = false;
Rectangle MouseRect = Rectangle.Empty;
public Form2()
{
InitializeComponent();
this.MouseDown += new MouseEventHandler(frmMain_MouseDown);
this.MouseMove += new MouseEventHandler(frmMain_MouseMove);
this.MouseUp += new MouseEventHandler(frmMain_MouseUp);
}
private void Form2_Load(object sender, EventArgs e)
{
}
void frmMain_MouseUp(object sender, MouseEventArgs e)
{
this.Capture = false;
Cursor.Clip = Rectangle.Empty;
MouseIsDown = false;
DrawRectangle();
MouseRect = rectCorrection(MouseRect);
foreach (Control ct in this.Controls)
{
// Point ctrlCenter = new Point(ct.Location.X + ct.Width / 2, ct.Location.Y + ct.Height / 2);
//if (ctrlCenter.X > MouseRect.Location.X
// && ctrlCenter.X < MouseRect.Location.X + MouseRect.Width
// && ctrlCenter.Y > MouseRect.Location.Y && ctrlCenter.Y > MouseRect.Location.Y + MouseRect.Height)
if (MouseRect.Contains(ct.Location))
{
if (ct is CheckBox)
{
if (((CheckBox)ct).Checked) //值选中
{
((CheckBox)ct).Checked = false;
}
else
{
((CheckBox)ct).Checked = true;
}
//控件选中
}
}
}
MouseRect = Rectangle.Empty;
}
//修正MouseRect 的值
Rectangle rectCorrection(Rectangle oldRect)
{
if (oldRect.Width < 0)
{
oldRect.X += oldRect.Width;
oldRect.Width *= -1;
}
if (oldRect.Height < 0)
{
oldRect.Y += oldRect.Height;
oldRect.Height *= -1;
}
return new Rectangle(oldRect.X, oldRect.Y, oldRect.Width, oldRect.Height);
}
void frmMain_MouseMove(object sender, MouseEventArgs e)
{
if (MouseIsDown)
ResizeToRectangle(e.Location);
}
void frmMain_MouseDown(object sender, MouseEventArgs e)
{
MouseIsDown = true;
DrawStart(e.Location);
}
private void ResizeToRectangle(Point p)
{
DrawRectangle();
MouseRect.Width = p.X - MouseRect.Left;
MouseRect.Height = p.Y - MouseRect.Top;
DrawRectangle();
}
private void DrawRectangle()
{
Rectangle rect = this.RectangleToScreen(MouseRect);
ControlPaint.DrawReversibleFrame(rect, Color.White, FrameStyle.Dashed);
}
private void DrawStart(Point StartPoint)
{
this.Capture = true;
Cursor.Clip = this.RectangleToScreen(new Rectangle(0, 0, ClientSize.Width, ClientSize.Height));
MouseRect = new Rectangle(StartPoint.X, StartPoint.Y, 0, 0);
}
}
}
Form2.Designer.cs界面布局如下
using System.Drawing;
using System.Windows.Forms;
namespace Win
{
partial class Form2
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.cb1 = new CheckBox();
this.cb3 = new CheckBox();
this.cb5 = new CheckBox();
this.cb6 = new CheckBox();
this.cb7 = new CheckBox();
this.cb8 = new CheckBox();
this.cb9 = new CheckBox();
this.cb10 = new CheckBox();
this.cb2 = new CheckBox();
this.cb4 = new CheckBox();
this.cb11 = new CheckBox();
this.cb12 = new CheckBox();
this.cb13 = new CheckBox();
this.cb14 = new CheckBox();
this.cb15 = new CheckBox();
this.cb16 = new CheckBox();
this.cb17 = new CheckBox();
this.cb18 = new CheckBox();
this.SuspendLayout();
//
// Form2
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(800, 450);
this.Name = "Form2";
this.Text = "Form2";
this.Load += new System.EventHandler(this.Form2_Load);
this.ResumeLayout(false);
// cb1
//
this.cb1.AutoSize = true;
this.cb1.BackgroundImageLayout = ImageLayout.None;
this.cb1.Location = new Point(29, 51);
this.cb1.Name = "cb1";
this.cb1.Size = new Size(80, 17);
this.cb1.TabIndex = 0;
this.cb1.Text = "cb1";
this.cb1.UseVisualStyleBackColor = true;
//
// cb3
//
this.cb3.AutoSize = true;
this.cb3.Location = new Point(29, 75);
this.cb3.Name = "cb3";
this.cb3.Size = new Size(80, 17);
this.cb3.TabIndex = 2;
this.cb3.Text = "cb3";
this.cb3.UseVisualStyleBackColor = true;
//
// cb5
//
this.cb5.AutoSize = true;
this.cb5.Location = new Point(29, 98);
this.cb5.Name = "cb5";
this.cb5.Size = new Size(80, 17);
this.cb5.TabIndex = 4;
this.cb5.Text = "cb5";
this.cb5.UseVisualStyleBackColor = true;
//
// cb6
//
this.cb6.AutoSize = true;
this.cb6.Location = new Point(29, 121);
this.cb6.Name = "cb6";
this.cb6.Size = new Size(80, 17);
this.cb6.TabIndex = 5;
this.cb6.Text = "cb6";
this.cb6.UseVisualStyleBackColor = true;
//
// cb7
//
this.cb7.AutoSize = true;
this.cb7.Location = new Point(29, 212);
this.cb7.Name = "cb7";
this.cb7.Size = new Size(80, 17);
this.cb7.TabIndex = 9;
this.cb7.Text = "cb7";
//
// cb8
//
this.cb8.AutoSize = true;
this.cb8.Location = new Point(29, 189);
this.cb8.Name = "cb8";
this.cb8.TabIndex = 8;
this.cb8.Text = "cb8";
this.cb8.UseVisualStyleBackColor = true;
//
// cb9
//
this.cb9.AutoSize = true;
this.cb9.Location = new Point(29, 166);
this.cb9.Name = "cb9";
this.cb9.Size = new Size(80, 17);
this.cb9.TabIndex = 7;
this.cb9.Text = "cb9";
this.cb9.UseVisualStyleBackColor = true;
//
// cb10
//
this.cb10.AutoSize = true;
this.cb10.Location = new Point(29, 142);
this.cb10.Name = "cb10";
this.cb10.Size = new Size(86, 17);
this.cb10.TabIndex = 6;
this.cb10.Text = "cb10";
this.cb10.UseVisualStyleBackColor = true;
//
// cb2
//
this.cb2.AutoSize = true;
this.cb2.Location = new Point(115, 212);
this.cb2.Name = "cb2";
this.cb2.Size = new Size(80, 17);
this.cb2.TabIndex = 17;
this.cb2.Text = "cb2";
this.cb2.UseVisualStyleBackColor = true;
//
// cb4
//
this.cb4.AutoSize = true;
this.cb4.Location = new Point(115, 189);
this.cb4.Name = "cb4";
this.cb4.Size = new Size(80, 17);
this.cb4.TabIndex = 16;
this.cb4.Text = "cb4";
this.cb4.UseVisualStyleBackColor = true;
//
// cb11
//
this.cb11.AutoSize = true;
this.cb11.Location = new Point(115, 166);
this.cb11.Name = "cb11";
this.cb11.Size = new Size(86, 17);
this.cb11.TabIndex = 15;
this.cb11.Text = "cb11";
this.cb11.UseVisualStyleBackColor = true;
//
// cb12
//
this.cb12.AutoSize = true;
this.cb12.Location = new Point(115, 142);
this.cb12.Name = "cb12";
this.cb12.Size = new Size(86, 17);
this.cb12.TabIndex = 14;
this.cb12.Text = "cb12";
this.cb12.UseVisualStyleBackColor = true;
//
// cb13
//
this.cb13.AutoSize = true;
this.cb13.Location = new Point(115, 121);
this.cb13.Name = "cb13";
this.cb13.Size = new Size(86, 17);
this.cb13.TabIndex = 13;
this.cb13.Text = "cb13";
this.cb13.UseVisualStyleBackColor = true;
//
// cb14
//
this.cb14.AutoSize = true;
this.cb14.Location = new Point(115, 98);
this.cb14.Name = "cb14";
this.cb14.Size = new Size(86, 17);
this.cb14.TabIndex = 12;
this.cb14.Text = "cb14";
this.cb14.UseVisualStyleBackColor = true;
//
// cb15
//
this.cb15.AutoSize = true;
this.cb15.Location = new Point(115, 75);
this.cb15.Name = "cb15";
this.cb15.Size = new Size(86, 17);
this.cb15.TabIndex = 11;
this.cb15.Text = "cb15";
this.cb15.UseVisualStyleBackColor = true;
//
// cb16
//
this.cb16.AutoSize = true;
this.cb16.Location = new Point(115, 51);
this.cb16.Name = "cb16";
this.cb16.Size = new Size(86, 17);
this.cb16.TabIndex = 10;
this.cb16.Text = "cb16";
this.cb16.UseVisualStyleBackColor = true;
//
// cb17
//
this.cb17.AutoSize = true;
this.cb17.Location = new Point(220, 212);
this.cb17.Name = "cb17";
this.cb17.Size = new Size(86, 17);
this.cb17.TabIndex = 25;
this.cb17.Text = "cb17";
this.cb17.UseVisualStyleBackColor = true;
//
// Form2
//
this.AllowDrop = true;
this.AutoScaleDimensions = new SizeF(6F, 13F);
this.AutoScaleMode = AutoScaleMode.Font;
this.ClientSize = new Size(403, 297);
this.Controls.Add(this.cb17);
this.Controls.Add(this.cb2);
this.Controls.Add(this.cb4);
this.Controls.Add(this.cb11);
this.Controls.Add(this.cb12);
this.Controls.Add(this.cb13);
this.Controls.Add(this.cb14);
this.Controls.Add(this.cb15);
this.Controls.Add(this.cb16);
this.Controls.Add(this.cb7);
this.Controls.Add(this.cb8);
this.Controls.Add(this.cb9);
this.Controls.Add(this.cb10);
this.Controls.Add(this.cb6);
this.Controls.Add(this.cb5);
this.Controls.Add(this.cb3);
this.Controls.Add(this.cb1);
this.Name = "Form2";
this.Text = "Form2";
this.ResumeLayout(false);
this.PerformLayout();
}
private CheckBox cb1;
private CheckBox cb3;
private CheckBox cb5;
private CheckBox cb6;
private CheckBox cb7;
private CheckBox cb8;
private CheckBox cb9;
private CheckBox cb10;
private CheckBox cb2;
private CheckBox cb4;
private CheckBox cb11;
private CheckBox cb12;
private CheckBox cb13;
private CheckBox cb14;
private CheckBox cb15;
private CheckBox cb16;
private CheckBox cb17;
private CheckBox cb18;
#endregion
}
}
完成以后代码界面如下：
可以鼠标拖动选择相应代码；