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

Question

网上找来点代码.....能够拉出虚线框了........但是不知道怎么选择控件...Form窗体上...this.GetChildAtPoint(e.Location); 用这个方法 但是不知道放什么地方(放那个事件里触发好);或者谁有其他的方法........思路说说.......自己琢磨了变天搞出不来哈
代码在下面...  public partial class Form1 : Form
  {
    bool MouseIsDown = false;
    Rectangle MouseRect = Rectangle.Empty;
    public Form1()
    {
      InitializeComponent();
      this.MouseDown += new MouseEventHandler(Form1_MouseDown);
      this.MouseMove += new MouseEventHandler(Form1_MouseMove);
      this.MouseUp += new MouseEventHandler(Form1_MouseUp);
    }    void Form1_MouseDown(object sender, MouseEventArgs e)
    {
      MouseIsDown = true;
      DrawStart(e.Location);
    }    void Form1_MouseMove(object sender, MouseEventArgs e)
    {
      if (MouseIsDown)
      {
        ResizeToRectangle(e.Location); 
      }
      //这里可以实现选中啊,但是必须要鼠标在子控件上活动过(鼠标路过子控件)才能选中
      //Control ctl = this.GetChildAtPoint(e.Location);
      //if (ctl != null)
      //{
      //  ctl.BackColor = Color.Blue;
      //}
    }    void Form1_MouseUp(object sender, MouseEventArgs e)
    {
      this.Capture = false;
      Cursor.Clip = Rectangle.Empty;
      MouseIsDown = false;
      DrawRectangle();
      MouseRect = Rectangle.Empty;
    }    private void Form1_Load(object sender, EventArgs e)
    {    }    private void ResizeToRectangle(Point p)
    {
      DrawRectangle();
      MouseRect.Width = p.X - MouseRect.Left;
      MouseRect.Height = p.Y - MouseRect.Top;
      DrawRectangle();
    }    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);
    }    private void DrawRectangle()
    {
      Rectangle rect = this.RectangleToScreen(MouseRect);
      ControlPaint.DrawReversibleFrame(rect, Color.White, FrameStyle.Dashed);
    }    private void Form1_ControlAdded(object sender, ControlEventArgs e)
    {
    }
  }

Answer 1

这个问题奇怪吗,不是吧,还是我米说清楚........就像Windows桌面,点击鼠标左键一拖.........桌面上的文件或者快捷方式就选中我想只要是容器 都应该可以实现这个功能的.........

Answer 2

貌似有点困难 
 ControlPaint.DrawReversibleFrame 方法 先绘制  鼠标移动一下 就把老到的rectangle删掉 直到鼠标左键弹起 获得最终的矩形 
然后通过遍历控件坐标 用Rectangle.Contain(Point)方法 判断是否包括

Answer 3

笨方法，遍历窗体的力所有控件的location，如果在虚线的范围内就选中
不过还要考虑控件本身的长和高

Answer 4

Rectangle.Intersect就可以满足你的要求了

Answer 5

定义个全局变量 int flag=-1;
如果画虚线的方法执行了 flag=0;
在鼠标弹起的事件里
{
   if(flag==0)
   {
      //判断控件
       flag=-1;
   }
}

Answer 6

mousedown mousemove mouseup都要用

Answer 7

Rectangle.Intersect 咋满足啊......???Rectangle.Intersect好像要得到两个矩形框......子控件的Rectangle咋得到呢??

Answer 8

子控件的Rectangle可以事先遍历得到

Answer 9

using System.Windows.Forms;
using System.Drawing;
namespace TestApp
{
    partial class Form2
    {        private System.ComponentModel.IContainer components = null;        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }        #region Windows Form Designer generated code        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();
            // 
            // 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();        }        #endregion        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;
    }
}

Answer 10

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 TestApp
{
    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);        }        void frmMain_MouseUp(object sender, MouseEventArgs e)
        {
            this.Capture = false;
            Cursor.Clip = Rectangle.Empty;
            MouseIsDown = false;
            DrawRectangle();            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;
        }
        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);
        }
    }
}

Answer 11

测试了一下楼上的  用VS2008 提示两个问题
1、this.AutoScaleMode = AutoScaleMode.Font;提示不能手动更改
2、using System.Linq;  这个08里面的吧

Answer 12

其实就 这些代码有用，其它都是测试用的 代码太长了 提交不了 所以才精简了
MouseRect.Contains(ct.Location)这个算法是可以扩展的          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)
                    {

Answer 13

Rectangle.Intersect()  还是不行了, 不知道在哪个事件里触发好......不用到循环最好了

Answer 14

最后获取选中的控件 当然是在mouseup里了
用rectangle的Contain(Point)啊
point就是控件的location

Answer 15

1)把最后画的矩形保存下来,rect,
2)在MouseUp 事件里,建立画笔,
判断控件的位置是否在rect范围之内.如果在的话给其自绘选中效果,我这做了,
可以实现,但是刷新时有点小问题,没空调了,你自己试下吧Graphics g = Graphics.FromHwnd(this.Handle);
//在此判断控件的位置,如果在选中范围内,刚给其自绘选中效果
{
    g.DrawRectangle(new Pen(Brushes.Red, 1), 
                        new Rectangle(ctl.Location.X - 1, ctl.Location.Y - 1, 
                        ctl.Size.Width + 1, ctl.Size.Height + 1));
                    g.Dispose();
}

Answer 16

小改一下,呵呵foreach(Control ctl in this.Controls){
    Graphics g = Graphics.FromHwnd(this.Handle);
    //在此判断控件的位置,如果在选中范围内,则给其自绘选中效果
   if(控件在选中矩形范围内)
    {
        g.DrawRectangle(new Pen(Brushes.Red, 1), 
                        new Rectangle(ctl.Location.X - 1, ctl.Location.Y - 1, 
                        ctl.Size.Width + 1, ctl.Size.Height + 1));
                    g.Dispose();
    }
}

Answer 17

谢谢 各位了.......大家都是写在MouseUp事件里的.......谁能弄个MouseMove 事件里写个了 我觉得还是要用这个方法:  this.GetChildAtPoint(坐标);  现在就是不知道 虚线和子控件 交叉的一瞬间 怎么去触发一个事件,得到一个(坐标)......我相信应该是可以实现的

Answer 18

用 zcl24 的方法可以啊。只要在MouseUp是修正下 MouseRect 的值就可以了
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);
        }