不管是做web，还是做C/S，经常会用到各种各样的功能按钮图片。然而有的时候控件要求图片格式为Ico，有时候要求是jpg、png、gif等。再加上网上的精美图标资源很多，图标的尺寸都比较统一等等因素，图标转化成png图片，然后拿去做按钮是非常不错的。

在网上找了半天，png转ico的工具很多，但是ico转png的却没有找到，所以就自己研究了下，做了个。其实做这个东西非常简单，代码也很少，这是全部代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;namespace IconToBmp
{public partial class Form1 : Form{public Form1(){InitializeComponent();}List<string> iconList = new List<string>();string outPath;string selectPath;/// <summary>/// 选择图标/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnSelect_Click(object sender, EventArgs e){if (openFileDialog1.ShowDialog() == DialogResult.OK){iconList.Clear();foreach (string str in openFileDialog1.FileNames){iconList.Add(str);}selectPath = openFileDialog1.FileName;txtInput.Text = "选择了" + iconList.Count.ToString() + "个图标。";}}/// <summary>/// 选择输出文件夹/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnOutput_Click(object sender, EventArgs e){if (folderBrowserDialog1.ShowDialog() == DialogResult.OK){outPath = folderBrowserDialog1.SelectedPath;txtOutput.Text = outPath;}}/// <summary>/// 转换前的数据验证/// </summary>/// <returns></returns>private bool Valid(){if (txtOutput.Text.Trim() == ""){MessageBox.Show("请选择图片输出位置！");return false;}if (iconList.Count == 0 || iconList == null){MessageBox.Show("请选择要转化的图标！");return false;}return true;}/// <summary>/// 转换/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnGo_Click(object sender, EventArgs e){if (!Valid()){return;}int count = 0;foreach (string str in iconList){try{string iconName = str.Substring(str.LastIndexOf(@"\")).Replace(".ico", ".png");System.Drawing.Icon icon = new Icon(str);Bitmap bmp = icon.ToBitmap();if (File.Exists(@outPath + iconName))//如果该文件已经存在{DialogResult result = MessageBox.Show(iconName.Substring(1) + "已存在，是否替换？", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Information);if (result == DialogResult.OK )//如果替换{bmp.Save(@outPath + iconName);count++;}}else{bmp.Save(@outPath + iconName);count++;}}catch (Exception ex){MessageBox.Show("遇到异常，已终止转换，已转换"+count.ToString()+"个文件，异常消息："+ex.Message);return;}}MessageBox.Show("共选择"+iconList.Count+"个图标，已转换" + count.ToString() + "个，"+(iconList.Count-count).ToString()+"个被跳过。");}/// <summary>/// 窗体加载/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void Form1_Load(object sender, EventArgs e){folderBrowserDialog1.RootFolder = Environment.SpecialFolder.Desktop;if (selectPath != ""){openFileDialog1.InitialDirectory = selectPath;}}}
}