C# 批量图片合并工具（附源代码）

ps: 最近在网上寻了几天asp.net相关教材，最终发现几本PDF教材还不错，于是下来看看。但是本人还是不大习惯用电脑上看，眼睛受不起！

于是去买了A4纸打印出重要章节看看，结果发现PDF里都加上logo备注信息，原大小打印到A4纸上字太小了，放大了打印还歪的，怎么办?

只好导出PDF里的所有图片再打印。结果麻烦一个又接一个啊，发现里面导出的图片都是半截的，每2张图片为一页。哇靠！还得拼接图片再打印，

又下载Photoshop蛮有耐心的拼接了几十张出来，整个人麻木了。啊ri_ta祖宗de，就不能给我弄好了再发出来？  哎！算了反正也都是免费下的，

继续上网搜索关于批量图片合成工具，找了半天没有一个是给我这个定身量做的！看来只能自己动手做一个了，差点忘记自己学啥了。。。

   通过一个晚上的研究，最后终于使用自己编写的程序完成了我的个人需求。 好了，废话不多说下面附上所写代码：

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;
using System.IO;

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public string GetButton_Click(object sender)
        {
            string sPath = "";
            switch (((Button)sender).Name)
            {
                case "button1":
                    if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
                    {
                        sPath = folderBrowserDialog1.SelectedPath.ToString();
                    }
                    break;
                case "button2":
                    if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
                    {
                        sPath = folderBrowserDialog1.SelectedPath.ToString();
                    }
                    break;
            }
            return sPath;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            textBox1.Text = GetButton_Click(sender);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            textBox2.Text = GetButton_Click(sender);
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            listBox1.Items.Clear();
            button3.Enabled = false;
            if (textBox1.Text != "")
            { 
                DirectoryInfo TheFolder1 = new DirectoryInfo(textBox1.Text);
                foreach (FileInfo NextFile in TheFolder1.GetFiles(comboBox1.Text))
                    this.listBox1.Items.Add(NextFile.Name);
                label6.Text = string.Format("共：{0} 个文件", listBox1.Items.Count);
                if (listBox1.Items.Count > 2 && textBox2.Text != "")
                    button3.Enabled = true;
                else
                    button3.Enabled = false;
            }      
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {
            if (listBox1.Items.Count > 2 && textBox2.Text != "")
                button3.Enabled = true;
            else
                button3.Enabled = false;
        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            comboBox2.SelectedIndex = comboBox1.SelectedIndex;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            comboBox1.SelectedIndex = 0;
            comboBox2.SelectedIndex = 0;
        }

        private Bitmap MergerImg(params Bitmap[] maps)
        {
            int X = 0;
            int Y = 0;
            Bitmap newImg;
            for (int i = 0; i < maps.Length; i++)
            {
                if (radioButton1.Checked) //左右合并
                {
                    X += maps[i].Width;
                    Y = Y > maps[i].Height ? Y : maps[i].Height;
                }
                else                      //上下合并
                {

                    X = X > maps[i].Width ? X : maps[i].Width;
                    Y += maps[i].Height;
                }
            }
            newImg = new Bitmap(X, Y);
            X = 0;
            Y = 0;
            Graphics g = Graphics.FromImage(newImg);
            g.Clear(System.Drawing.Color.White);
            for (int i = 0; i < maps.Length; i++)
            {
                g.DrawImage(maps[i], X, Y, maps[i].Width, maps[i].Height);
                if (radioButton1.Checked) //左右合并
                {
                    X += maps[i].Width;
                }
                else
                {
                    Y += maps[i].Height;
                }
            }
            g.Dispose();
            return newImg;
        }

        private void button3_Click(object sender, EventArgs e)
        {
            try
            {
                comboBox1.Enabled = false;
                comboBox2.Enabled = false;
                button1.Enabled = false;
                button2.Enabled = false;
                button3.Enabled = false;
                numericUpDown1.Enabled = false;
                radioButton1.Enabled = false;
                radioButton2.Enabled = false;
                Bitmap[] bit = new Bitmap[(int)numericUpDown1.Value];
                int j = 0;
                progressBar1.Maximum = listBox1.Items.Count;
                progressBar1.Value = 0;
                for (int i = 1; i < listBox1.Items.Count + 1; i++)
                {
                    bit[j] = new Bitmap(textBox1.Text + "\\" + listBox1.Items[i - 1].ToString());
                    j++;
                    if (i % (int)numericUpDown1.Value == 0)
                    {
                        j = 0;
                        string str;
                        str = textBox2.Text + "\\temp" + ((int)(i / (int)numericUpDown1.Value)).ToString() + comboBox2.Text;
                        if (this.comboBox2.SelectedIndex == 0)
                        {
                            MergerImg(bit).Save(str, System.Drawing.Imaging.ImageFormat.Bmp);
                        }
                        else
                        {
                            MergerImg(bit).Save(str, System.Drawing.Imaging.ImageFormat.Jpeg);
                        }
                    }
                    if (progressBar1.Value < progressBar1.Maximum)
                        progressBar1.Value += 1;
                    label5.Text = ((progressBar1.Value * 100) / (progressBar1.Maximum)).ToString() + " %";
                    Application.DoEvents();
                }
                MessageBox.Show("合并完成！", "提示", MessageBoxButtons.OK);
            }
            catch (Exception ee)
            {
                MessageBox.Show(ee.Message);
            }
            finally
            {
                comboBox1.Enabled = true;
                comboBox2.Enabled = true;
                button1.Enabled = true;
                button2.Enabled = true;
                button3.Enabled = true;
                numericUpDown1.Enabled = true;
                radioButton1.Enabled = true;
                radioButton2.Enabled = true;
            }
        }
        
    }
}