图片放大和缩小C＃.net [英] Picture Zoom In and Zoom Out in C#.net

问题描述

嗨朋友们，

现在我在C＃.net工作。我正在寻找C＃.Net中的图片放大和缩小。我的属性是表格，图片框和工具条。在该工具条中，工具条中有3个按钮，一个是放大，另一个是缩小和关闭。我在图片框中插入一个JPEG文件。如果我单击放大button.Image将放大并单击Zoom Out按钮.Image将缩小如何执行此操作？请为这些问题找一个代码。请帮助我。

问候，

Lakshmi Narayanan.S

Hi friends,
Now I am working in C #.net .i am looking for Picture Zoom In and Zoom Out in C#.Net. My Properties are Form,Picture Box and Tool strip .In that Tool strip ,3 buttons are in that Tool strip one is Zoom In ,another One is Zoom Out and Close.i insert a JPEG File in picture box.if i click Zoom In button.Image will Zoom In.and click Zoom Out button .Image will Zoom Out how to do this?Please I want a Code for these issue.please help me.
Regards,
Lakshmi Narayanan.S

推荐答案

谷歌是你的朋友：好好经常拜访他。他可以比在这里发布问题更快地回答问题...



这里有一篇文章： PictureBox放大 [ ^ ] - 你会发现，如果你曾尝试过基本的谷歌......

Google is your friend: Be nice and visit him often. He can answer questions a lot more quickly than posting them here...

There is an article here: PictureBox Zoom[^] - which you would have found, if you had tried even a basic google...

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 WindowsFormsApplication5
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private Image imgOriginal;

        private void Form1_Load(object sender, EventArgs e)
             {            
                             // set Slider Attributes
                               zoomSlider.Minimum = 1;
                                zoomSlider.Maximum = 5;
                                  zoomSlider.SmallChange = 1;
                                   zoomSlider.LargeChange = 1;
                                    zoomSlider.UseWaitCursor = false;
 
                   // reduce flickering
                 this.DoubleBuffered = true;
              }
        
        public Image PictureBoxZoom(Image img, Size size)
        {
            imgOriginal = Image.FromFile(openFileDialog1.FileName);
            Bitmap bm = new Bitmap(imgOriginal, Convert.ToInt32(imgOriginal.Width * size.Width), Convert.ToInt32(imgOriginal.Height * size.Height));
            Graphics grap = Graphics.FromImage(bm);
            //grap.InterpolationMode = InterpolationMode.HighQualityBicubic;
            return bm;
        }

        private void zoomSlider_Scroll(object sender, EventArgs e)
        {
            if (zoomSlider.Value > 0)
            {
                picBox.Image = null;
                picBox.Image = PictureBoxZoom(imgOriginal, new Size(zoomSlider.Value, zoomSlider.Value));
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            openFileDialog1.ShowDialog();
            DialogResult res = MessageBox.Show("Message", "Try", MessageBoxButtons.YesNo);
            if (res == DialogResult.Yes)
            {
                string imagepath = openFileDialog1.FileName;
                picBox.ImageLocation = imagepath;
            }
            else
            {
                MessageBox.Show("picture cancelled", "message");
            }
        }

        }
    }

放大：



pictureBox1.Top =（int）（pictureBox1.Top - （pictureBox1.Height * 0.025））;

pictureBox1.Left =（int）（pictureBox1 .Left - （pictureBox1.Width * 0.025））;

pictureBox1.Height =（int）（pictureBox1.Height +（pictureBox1.Height * 0.05））;

pictureBox1 .Width =（int）（pictureBox1.Width +（pictureBox1.Width * 0.05））;



缩小：



pictureBox1.Top =（int）（pictureBox1.Top +（pictureBox1.Height * 0.025））;

pictureBox1.Left =（int）（pictureBox1.Left +（pictureBox1。宽度* 0.025））;

pictureBox1.Height =（int）（pictureBox1.Height - （pictureBox1.Height * 0.05））;

pictureBox1.Width =（int） （pictureBox1.Width - （pictureBox1.Width * 0.05））;

For Zooming In :

pictureBox1.Top= (int)(pictureBox1.Top - (pictureBox1.Height * 0.025));
pictureBox1.Left = (int)(pictureBox1.Left - (pictureBox1.Width * 0.025));
pictureBox1.Height = (int)(pictureBox1.Height + (pictureBox1.Height* 0.05));
pictureBox1.Width = (int)(pictureBox1.Width + (pictureBox1.Width * 0.05));

For Zooming Out :

pictureBox1.Top = (int)(pictureBox1.Top + (pictureBox1.Height * 0.025));
pictureBox1.Left = (int)(pictureBox1.Left + (pictureBox1.Width * 0.025));
pictureBox1.Height = (int)(pictureBox1.Height - (pictureBox1.Height* 0.05));
pictureBox1.Width = (int)(pictureBox1.Width - (pictureBox1.Width * 0.05));

这篇关于图片放大和缩小C＃.net的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！