首页 / C# / c#：拖动功能

c#：拖动功能

内容导读

互联网集市收集整理的这篇技术教程文章主要介绍了c#：拖动功能，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含2332字，纯文字阅读大概需要4分钟。

内容图文

需求：放在图层上一个图片，要实现鼠标可以选中，并实现拖放功能。

代码实现：

            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
             workflowPro
{
    
            public
            partial
            class
             Form1 : Form
    {
        
            private
            int offsetX = 0;
        privateint offsetY = 0;

        public List<Control> panelControls = new List<Control>();
        public Dictionary<Control, List<List<Point>>> rules = new Dictionary<Control, List<List<Point>>>();

        public Form1()
        {
            InitializeComponent();

            PictureBox pictureBox = new PictureBox();
            pictureBox.Image = System.Drawing.Bitmap.FromFile(AppDomain.CurrentDomain.BaseDirectory + "\\201208241209467792.png");
            pictureBox.Height = 80;
            pictureBox.Width = 80;

            pictureBox.MouseDown += mouseDown;
            pictureBox.MouseUp += mouseUp;
            pictureBox.MouseMove += mouseMove;

            panelControls.Add(pictureBox);

            offsetX = this.panel1.Location.X;
            offsetY = this.panel1.Location.Y;

            this.panel1.Controls.Add(pictureBox);
        }

        private Point mouseDownPoint = new Point();
        private Control selectedControl = new Control();
        private Control moveToControl = new Control();

        void mouseDown(object sender, MouseEventArgs e)
        {
            this.selectedControl = sender as Control;

            if (e.Button == System.Windows.Forms.MouseButtons.Left)
            {
                this.lblPosition.Text = "(" + e.X + "," + e.Y + ")|";

                mouseDownPoint = e.Location;
            }
        }

        void mouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == System.Windows.Forms.MouseButtons.Left && this.selectedControl != null)
            {
                Point point = this.PointToClient(this.selectedControl.PointToScreen(new Point(e.X - mouseDownPoint.X, e.Y - mouseDownPoint.Y)));
                this.selectedControl.Location = point;
                this.selectedControl.Location.Offset(offsetX, -offsetY);

                this.lblPosition.Text = "|(" + point.X + "," + point.Y + ")";
            }
        }

        void mouseUp(object sender, MouseEventArgs e)
        {
            this.selectedControl = null;
        }

        privatevoid MoveToWho(MouseEventArgs e)
        {
            foreach (Control control in panelControls)
            {
                int x1 = control.Location.X + offsetX;
                int y1 = control.Location.Y + offsetY;
                int x2 = x1 + control.Width;
                int y2 = y1 + control.Height;

                if (e.X > x1 && e.X < x2 && e.Y > y1 && e.Y < y2)
                {
                    this.moveToControl = control;
                }
            }
        }
    }
}

 

原文：http://www.cnblogs.com/yy3b2007com/p/5742586.html

内容总结

以上是互联网集市为您收集整理的c#：拖动功能全部内容，希望文章能够帮你解决c#：拖动功能所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。

内容备注

版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 gblab@vip.qq.com 举报，一经查实，本站将立刻删除。

内容手机端

扫描二维码推送至手机访问。

本文链接：https://qyyshop.com/info/1202028.html

来源：【匿名】