using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace BatchRename
{
	/// <summary>
	/// Form1 的摘要說明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.TextBox tbDir;
		private System.Windows.Forms.TextBox tbHead;
		private System.Windows.Forms.Button button1;
		/// <summary>
		/// 必需的設計器變量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Windows 窗體設計器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 調用后添加任何構造函數代碼
			//
		}

		/// <summary>
		/// 清理所有正在使用的資源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗體設計器生成的代碼
		/// <summary>
		/// 設計器支持所需的方法 - 不要使用代碼編輯器修改
		/// 此方法的內容。
		/// </summary>
		private void InitializeComponent()
		{
			this.label1 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.tbDir = new System.Windows.Forms.TextBox();
			this.tbHead = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(40, 24);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(80, 16);
			this.label1.TabIndex = 0;
			this.label1.Text = "目標文件夾：";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(48, 80);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(48, 16);
			this.label3.TabIndex = 2;
			this.label3.Text = "前綴：";
			// 
			// tbDir
			// 
			this.tbDir.Location = new System.Drawing.Point(120, 16);
			this.tbDir.Name = "tbDir";
			this.tbDir.TabIndex = 3;
			this.tbDir.Text = "textBox1";
			// 
			// tbHead
			// 
			this.tbHead.Location = new System.Drawing.Point(112, 72);
			this.tbHead.Name = "tbHead";
			this.tbHead.TabIndex = 5;
			this.tbHead.Text = "textBox3";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(104, 136);
			this.button1.Name = "button1";
			this.button1.TabIndex = 6;
			this.button1.Text = "do!";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(256, 273);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.tbHead);
			this.Controls.Add(this.tbDir);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.label1);
			this.Name = "Form1";
			this.Text = "Form1";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 應用程序的主入口點。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			System.Random random  = new Random();
			string a = System.IO.Directory.GetCurrentDirectory();
			if ( ! tbDir.Text.EndsWith("\\") )tbDir.Text += "\\";
			tbDir.Text = tbDir.Text.ToLower();

			string [] files = System.IO.Directory.GetFiles(tbDir.Text);
			foreach ( string file in files )
			{
				System.Text.StringBuilder filename = new System.Text.StringBuilder(file);
				filename.Remove(0,tbDir.Text.Length);

				if ( filename.ToString().StartsWith(tbHead.Text) ) 
				{
					filename = filename.Remove(0,file.IndexOf('_'));
				}
				string newname = tbDir.Text + tbHead.Text + random.Next(10000).ToString() + "_" + filename.ToString();
				System.IO.File.Move(file,newname);
			}
			MessageBox.Show("Well Done!");
		}
	}
}