Question

我创建了大约12个picbox并且动态标签能够检索picbox中的数据并从SQL中标记。二进制格式的picbox图像和表中的imagestore也包含数据库中的图像标题的行。

问题是我想在picbox上添加一个click_event。尽快我点击picbox一个textbox1。我创建的文本必须显示存储在SQL中的图像的标题。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace library
{
    public partial class showingmore : Form
    {
        private string passvalue;
        public string passval
        {
            get { return passvalue; }
            set { passvalue = value; }
        }
        public showingmore()
        {
            InitializeComponent();

        }

        MemoryStream ms;
        byte[] photo_aray;


        private void showingmore_Load_1(object sender, EventArgs e)
        {

            OleDbConnection con = new OleDbConnection("Provider=SQLOLEDB;User ID=sa;Password =12345678; Initial Catalog=library; server=raj; TRUSTED_CONNECTION=true;");
            OleDbDataAdapter Adap = new OleDbDataAdapter("select * from movie ", con);
            textBox1.Text = passvalue;
            DataSet ds = new DataSet();
            Adap.Fill(ds);

            //textBox1.Text = ds.Tables[0].Rows[15][0].ToString(); // the working way to use ds to fill data

            //textBox1.Text = ds.Tables[0].Rows[1];
            //int icount = ds.Tables[0].Rows.Count;
            //textBox1.Text = icount.ToString();

           /**** Creating Label's and Picture Box ****/ 
            int n = 12; // total time for running loop.
            int j = 14; // y-axis co-ordinate label 
            int k = 479; // x-axis co-ordinate label
            int l = 18; // y-axis co-ordinate label

            // Creating label through loop's.
            for (int i = 0; i < n; i++)
            {
                //Create label
                Label labels = new Label();
                PictureBox picbox = new PictureBox();
                labels.Text = ds.Tables[0].Rows[i][0].ToString();

                if (i <= 5)
                {
                    //Position label on screen
                    labels.Location = new Point(j, k);
                    j = j + 228;
                    // Label text color
                    labels.ForeColor = Color.Gainsboro;
                }
                else
                {
                    k = 782; // x-axis co-ordinate
                    labels.Location = new Point(l, k);
                    l = l + 228;
                    labels.ForeColor = Color.Gainsboro;
                }
                this.Controls.Add(labels);
            }

            n = 12; // total time for running loop.
            j = 18; // y-axis co-ordinate 
            k = 246; // x-axis co-ordinate
            l = 18; // y-axis co-ordinate

            // Creating PictureBox through loop's.
            for (int i = 0; i < n; i++)
            {
                //Create PictureBox
                PictureBox picbox = new PictureBox();
                picbox.Image = null;
                if (ds.Tables[0].Rows[i][14] != System.DBNull.Value)
                {
                    photo_aray = (byte[])ds.Tables[0].Rows[i][14];
                    MemoryStream ms = new MemoryStream(photo_aray);
                    picbox.Image = Image.FromStream(ms);

                }

                if (i <= 5)
                {
                    //Position PictureBox on screen
                    picbox.Location = new Point(j, k);
                    picbox.Size = new Size(161, 220);
                    picbox.BackColor = Color.Gainsboro;
                    j = j + 228;
                }
                else
                {
                    k = 543; // y-axis co-ordinate
                    picbox.Location = new Point(l, k);
                    picbox.Size = new Size(161, 220);
                    picbox.BackColor = Color.Gainsboro;
                    l = l + 228;
                }

                this.Controls.Add(picbox);


            }

        }
    }
}

Answer 1

要获取动态创建的PictureBox的click事件，您可以在创建时简单地订阅click事件;

    private void createPicBoxes()
    {
        for (int i = 0; i <= 12; i++)
        {
            PictureBox picBox = new PictureBox();
            picBox.Click += picBox_Click;
        }
    }

    static void picBox_Click(object sender, EventArgs e)
    {
        //do your stuff here which handles generically all of your picture boxes clicks.
    }

简而言之，订阅这样的控件事件意味着无论何时执行该操作，在您的情况下都会发生单击事件，附加的方法将会启动。

Answer 2

在将picbox添加到Controls集合之前将其放在循环中的某个位置：

picbox.MouseClick += picbox_MouseClick;

然后，在showingmore类的某处实现点击处理程序：

private void picbox_MouseClick(object sender, MouseEventArgs e)
{
    // Your code here.
}

Answer 3

创建PictureBox时，将事件处理程序添加到PictureBox中。像下面的东西


PictureBox picbox = new PictureBox();
picbox.Click += new EventHandler(this.picbox_Click);
void picbox_Click(object sender, System.EventArgs e)
{
//your code...
}

如何在动态创建的图像框上添加单击事件？

3 个答案: