C# 将参数传递给事件处理程序

背景： 为了完成学校的作业，我正在做一个益智游戏。玩家必须创建一个益智游戏并将其保存在文本文件中。首先，播放器输入一行一列的平铺（PictureBox），程序创建2d PictureBox布局。在玩家选择工具（从ImageList中指定图像的按钮）并单击平铺后，图像显示在平铺上

方法：我有一个自定义类，它继承自PictureBox类，并具有属性ToolValue。工具值是玩家选择并添加到该图片框中的工具（指定给工具的常量）。为了加载映像，我创建了一个新的事件处理程序，用于处理PictureBox控件的click事件，并在For循环中具有其他参数。新的事件处理程序在磁贴上加载图像，并将自定义PictureBox（MyPictureBox）类的ToolValue属性设置为常量。我已经创建了一个二维PictureBox类引用数组

MyPictureBox[,] Tile;

        public void DrawALineOfPictureBoxes(int rowNumber, int columnCount, int rowCount, int leftPosition, int topPosition, int height, int width)
        {
            Tile = new MyPictureBox[rowCount, columnCount];
            for (int colNumber = 0; colNumber < columnCount; colNumber++)
            {
                Tile[rowNumber, colNumber] = new MyPictureBox();
                Tile[rowNumber, colNumber].Left = leftPosition;
                Tile[rowNumber, colNumber].Top = topPosition;
                Tile[rowNumber, colNumber].Height = height;
                Tile[rowNumber, colNumber].Width = width;
                Tile[rowNumber, colNumber].BorderStyle = BorderStyle.Fixed3D;
                Tile[rowNumber, colNumber].SizeMode = PictureBoxSizeMode.StretchImage;
                Tile[rowNumber, colNumber].ToolValue = 0;
                Tile[rowNumber, colNumber].Click += new EventHandler((sender,e) => LoadImage_Click(sender, e, rowNumber, colNumber));
                this.Controls.Add(Tile[rowNumber, colNumber]);

                leftPosition += width;
            }
        }
        /// <summary>
        /// Method executes when Generate Button is clicked  
        /// Method invokes DrawALineOfPictureBoxes method which generates a row of Picture boxes
        /// 
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        /// 
        private void PictureBoxGenerate_Click(object sender, EventArgs e)
        {
            try
            {
                int numRows = int.Parse(txtRowCount.Text);
                int numColumns = int.Parse(txtColumnCount.Text);
                int leftPos = 400;
                int topPos = 120;
                int height = 100;
                int width = 100;
                //loop after each row of picturebox is generated
                for (int rowNumber = 0; rowNumber < numRows; ++rowNumber)
                {
                    DrawALineOfPictureBoxes(rowNumber, numColumns, numRows, leftPos, topPos, height, width);
                    topPos += height;
                }
            }
            catch (FormatException)
            {
                MessageBox.Show("Please provide valid data for rows and columns (Both must be integers)","Sokoban", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }


        /// <summary>
        /// Method is executed when PictureBox cell is clicked and load image to that picture box through resources
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void LoadImage_Click(object sender, EventArgs e, int rowNumber, int colNumber)
        {
            string Content = rowNumber.ToString() + "," + colNumber.ToString();
            Console.WriteLine(Content);
            MyPictureBox pictureBox = sender as MyPictureBox;
            switch (imageType)
            {
                case ImageType.None:
                    //Empty the pictureBox Cell
                    pictureBox.Image = null;
                    ToolVal = 0;

                    break;
                case ImageType.Hero:
                    pictureBox.Image = Properties.Resources.Hero;
                    ToolVal = 1;
                    break;
                case ImageType.Wall:
                    pictureBox.Image = Properties.Resources.Wall;
                    ToolVal = 2;
                    break;
                case ImageType.Box:
                    pictureBox.Image = Properties.Resources.Box;
                    ToolVal = 3;
                    break;
                case ImageType.Destination:
                    pictureBox.Image = Properties.Resources.Destination;
                    ToolVal = 4;
                    break;
                default:
                    break;
            }
            //assigning values to Tile array
            Tile[rowNumber,colNumber].ToolValue = ToolVal;
        }

MyPictureBox[，]瓷砖；
public void DrawAlineOffPictureBoxs（int rowNumber、int columnCount、int rowCount、int leftPosition、int topPosition、int height、int width）
{
Tile=新的MyPictureBox[行数，列数]；
for（int colNumber=0；colNumberLoadImage\u单击（发件人，e，rowNumber，colNumber））；
this.Controls.Add（平铺[rowNumber，colNumber]）；
leftPosition+=宽度；
}
}
/// 
///方法在单击“生成”按钮时执行
///方法调用DrawAlineOffPictureBoxs方法，该方法生成一行图片框
/// 
/// 
/// 
/// 
/// 
私有void PictureBoxGenerate\u单击（对象发送方，事件参数e）
{
尝试
{
int numRows=int.Parse（txtRowCount.Text）；
int numColumns=int.Parse（txtColumnCount.Text）；
int-leftPos=400；
int-topPos=120；
整数高度=100；
整数宽度=100；
//生成每行picturebox后循环
对于（int rowname=0；rowname

问题：我已将pictureBox的行数和列数作为参数传递给加载图像的EventHandler。在事件处理程序中，开关循环检查单击了哪个工具，并相应地将常量分配给toolValue属性。如果单击第一个picturebox，则传递给事件处理程序的参数为0（对于rowNumber）和0（对于colNumber）。事件处理程序参数应相同，但colNumber参数不是0，而是3，即生成的2d pictureBoxes的总列数

---

这里是输出>>

您的问题在下面一行：

Tile[rowNumber, colNumber].Click += new EventHandler((sender,e) => LoadImage_Click(sender, e, rowNumber, colNumber));

您正在使用传递rowNumber和colNumber的lambda表达式。 触发磁贴的Click事件时，将执行lambda并传递rowNumber和colNumber当时的值（而不是创建事件处理程序时的值）。因为循环已运行到完成，所以传递的colNumber值始终为3

因此，您需要另一种机制来计算单击的平铺的行和列。 您可以根据传递的发送方执行此操作：将其投射到平铺，检索其位置

Tile = new MyPictureBox[rowCount, columnCount];
        for (int colNumber = 0; colNumber < columnCount; colNumber++)
        {
            int actualColumn = colNumber;
            int actualRow = rowNumber; 

            Tile[rowNumber, colNumber] = new MyPictureBox();
            ...
            Tile[rowNumber, colNumber].Click += new EventHandler((sender,e) => LoadImage_Click(sender, e, actualRow, actualColumn));
            this.Controls.Add(Tile[rowNumber, colNumber]);

            leftPosition += width;
        }

//Shared handler for OK, Apply and Cancel Buttons
if(sender == btnOK || sender == btnApply){

}
if(sender == btnOK || sender == btnCancel){

}

PictureBox source = (PictureBox)sender;
source.ImageLocataion = "clicked.png";