C#拖放OXO [英] C# Drag and Drop OXO

问题描述

嘿，

我需要制作一个C#项目，允许您使用拖放功能来播放OXO.了解代码显示了我到目前为止所拥有的.我有2个问题.

1.图片框阵列始终位于拖动的对象的前面.
2.当我停止单击鼠标按钮(MouseUp事件处理程序)时，不会将拖动的对象放到图片框中.

有人知道答案吗?

Hey,

I need to make a C# project wich allows you to play OXO using Drag and Drop. Understanding code shows what i have till now. i have 2 problems.

1. The array of pictureboxes keeps getting in front of the dragged object.
2. When I stop clicking the mousebutton (MouseUp eventhandler) it won''t put my dragged object into a picturebox.

Someone knows an answer?

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 WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            //PictureBox MyX = new PictureBox();
            //PictureBox MyY = new PictureBox();
            InitializeComponent();
                
                MyX.MouseDown +=new MouseEventHandler(MyX_MouseDown);
                MyX.MouseMove +=new MouseEventHandler(MyX_MouseMove);    

                Point pX = new Point(230, 316);
                Point pY = new Point(20, 316);
                Bitmap X = new Bitmap("X.png");
                Bitmap Y = new Bitmap("O.jpg");
                MyX.BackgroundImage = X;
                MyX.BackgroundImageLayout = ImageLayout.Stretch;
                MyY.BackgroundImage = Y;
                MyY.BackgroundImageLayout = ImageLayout.Stretch;
                
                //
                int kolommen = 4;
                int rijen = 4;
                int aantalElementen = (kolommen * rijen) + 1;
                PictureBox[] Boxes = new PictureBox[aantalElementen];
                int tellerIndex = 1;
                for (int tellerRij = 1; tellerRij <= rijen; tellerRij++)
                {
                    for (int tellerKol = 1; tellerKol <= kolommen; tellerKol++)
                    {
                        Boxes[tellerIndex] = new PictureBox();
                        Boxes[tellerIndex].Name = "Picturebox" + tellerIndex.ToString();
                        Point positie = new Point((-50 + (tellerKol * 70)), (-50 + (tellerRij * 70)));
                        Boxes[tellerIndex].Width = 60;
                        Boxes[tellerIndex].BorderStyle = BorderStyle.FixedSingle;
                        Boxes[tellerIndex].Height = 60;
                        Boxes[tellerIndex].Location = positie;
                        Boxes[tellerIndex].AllowDrop = true;
                        tellerIndex++;
                    }
                }
                
                MyX.BorderStyle = BorderStyle.Fixed3D;
                MyX.Height = 60;
                MyX.Width = 60;
                MyX.Image = X;
                MyX.SizeMode = PictureBoxSizeMode.StretchImage;
                MyY.BorderStyle = BorderStyle.Fixed3D;
                MyY.Height = 60;
                MyY.Width = 60;
                MyY.Image = Y;
                MyY.SizeMode = PictureBoxSizeMode.StretchImage;
                MyX.Location = pX;
                MyY.Location = pY;


                this.Controls.AddRange(Boxes);
                this.Controls.Add(MyX);
                this.Controls.Add(MyY);
        }
        bool isDragging = false;
        int CurrentX, CurrentY;

        private void MyX_MouseMove(object sender, MouseEventArgs e)
        {
            if (isDragging == true)
            {
                MyX.Top = MyX.Top + (e.Y - CurrentY);
                MyX.Left = MyX.Left + (e.X - CurrentX);
            }
            
        }

        private void MyX_MouseDown(object sender, MouseEventArgs e)
        {
            isDragging = true;
            CurrentX = e.X;
            CurrentY = e.Y;
            
        }
        
    }
}

[edit]插入代码块以保留格式，较小的拼写-OriginalGriff [/edit]

[edit]Code block inserted to preserve formatting, minor spelling - OriginalGriff[/edit]

推荐答案

一些注意事项...

您还需要实现一个MouseUp事件.目前，没有什么可以告诉应用程序拖动已停止.这意味着，第一次按下鼠标按钮时，isDragging将始终为true.

您可能还想考虑不要移动MyX或MyY(尽管为什么将其命名为MyY而不是MyO毫无意义). (作为FYI，也使用c，命名约定是变量以小写字母开头，而类型或类以大写字母开头.)但是，这样做的方式还是需要MouseUp事件来重置您要拖动的PictureBox的位置.

如果要确保在其他控件之上绘制MyX，请尝试在开始拖动时像MyX.BringToFront();一样调用方法BringToFront.

您应该真正使用Google"c#拖放".这样做的方式很好，但是c#的创建者已经在控件中实现了内置函数来处理拖放.

a couple of notes...

you need to implement a MouseUp event as well. Right now, there''s nothing to tell the app that dragging has stopped. That means that once you push the mouse button down the first time, isDragging will always be true.

You also probably want to consider not moving MyX or MyY (though why you named it MyY instead of MyO makes no sense). (Also as an FYI, with c, the naming conventions are that variables start with a lower case while types or classes start with uppercase.) But the way you''re doing it, again, you need a MouseUp event to reset the position of the PictureBox that you are dragging.

If you want to make sure that MyX is being drawn on top of the other controls, try calling the method BringToFront as in MyX.BringToFront(); when you start the dragging.

You should really google "c# drag and drop". The way that you''re doing it is fine, but the creators of c# have implemented built-in functions in the controls to handle the drag drop.

对于拖动，您需要更改所拖动项目的Z顺序...

您需要使用Contains相对于控件数组检查"mouseDoneMoving"位置，以获取索引(控件)并手动对控件属性进行修改.

希望对您有所帮助...:confused:

For the dragging you will need to change the Z order for the dragged item...

You need to check the "mouseDoneMoving" position against your controls array using Contains to get the index(control) back and do the modification manually to that controls properties.

Hope that was helpfull...:confused:

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