dllee

本文轉貼自我 MSN ShareSpace 2005/6/18 的Item Of ComboBox：

今天終於去下載了 .NET SDK，試試 csc /out:sample.exe sample.cs 還真是簡單
以下是最近在學 GDI+ 時，修改書本的範例，所得到的心得，原本以為，.NET ComboBox 為什麼 List Item 只能放 object 沒有 string，原來她把這兩個東西給合併了。

附件：ItemOfComboBox.cs

PS1. MSN Spaces 不太適合貼程式碼... 金害...
PS2. 我貼的圖內含程式原始碼及 csc 輸出的可執行檔喔，下載改名為 .zip 可解出。

/*
 * Created by 記事本 [:P]
 * User: Lee, Dong-Liang  dllee@edirect168.com
 * Date: 2005/06/18
 */
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace ItemOfComboBox
{
	public class MainForm : System.Windows.Forms.Form
	{
		private System.Windows.Forms.ComboBox cBoxHatchStyle;
		private System.Windows.Forms.Button SelectColor;
		private System.Windows.Forms.Button SelectBKColor;

		public MainForm()
		{
			// cBoxHatchStyle
			this.cBoxHatchStyle = new System.Windows.Forms.ComboBox();
			this.cBoxHatchStyle.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
			this.cBoxHatchStyle.Location = new System.Drawing.Point(20, 10);
			this.cBoxHatchStyle.Name = "cBoxHatchStyle";
			this.cBoxHatchStyle.Size = new System.Drawing.Size(200, 20);
			this.cBoxHatchStyle.TabIndex = 16;
			this.cBoxHatchStyle.SelectedIndexChanged += new System.EventHandler(this.CBoxHatchStyleSelectedIndexChanged);

			// SelectColor
			this.SelectColor = new System.Windows.Forms.Button();
			this.SelectColor.BackColor = System.Drawing.Color.Blue;
			this.SelectColor.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
			this.SelectColor.Location = new System.Drawing.Point(250, 10);
			this.SelectColor.Name = "SelectColor";
			this.SelectColor.TabIndex = 8;
			this.SelectColor.Text = "Color1";
			this.SelectColor.Click += new System.EventHandler(this.SelectColorClick);

			// SelectBKColor
			this.SelectBKColor = new System.Windows.Forms.Button();
			this.SelectBKColor.BackColor = System.Drawing.Color.Yellow;
			this.SelectBKColor.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
			this.SelectBKColor.Location = new System.Drawing.Point(350, 10);
			this.SelectBKColor.Name = "SelectBKColor";
			this.SelectBKColor.TabIndex = 15;
			this.SelectBKColor.Text = "Color2";
			this.SelectBKColor.Click += new System.EventHandler(this.SelectBKColorClick);

			// MainForm
			this.ClientSize = new System.Drawing.Size(600, 400);
			this.Controls.Add(this.cBoxHatchStyle);
			this.Controls.Add(this.SelectColor);
			this.Controls.Add(this.SelectBKColor);
			this.Name = "MainForm";
			this.Text = "ItemOfComboBox : HatchSytle Example by http://dllee.ktop.com.tw";
			this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form_Paint);
			this.ActiveControl = this.cBoxHatchStyle;

			// C# 的 comboBox 可以直接加入物件，它似乎會自己取 .ToString() 的方法
			// 得到字串作列表，而加入的物件之後可以直接取出使用。
			this.cBoxHatchStyle.Items.Add(HatchStyle.BackwardDiagonal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Cross); // 與 LargeGrid 相同?!
			this.cBoxHatchStyle.Items.Add(HatchStyle.DarkDownwardDiagonal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.DarkHorizontal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.DarkUpwardDiagonal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.DarkVertical);
			this.cBoxHatchStyle.Items.Add(HatchStyle.DashedDownwardDiagonal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.DashedHorizontal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.DashedUpwardDiagonal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.DashedVertical);
			this.cBoxHatchStyle.Items.Add(HatchStyle.DiagonalBrick);
			this.cBoxHatchStyle.Items.Add(HatchStyle.DiagonalCross);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Divot);
			this.cBoxHatchStyle.Items.Add(HatchStyle.DottedDiamond);
			this.cBoxHatchStyle.Items.Add(HatchStyle.DottedGrid);
			this.cBoxHatchStyle.Items.Add(HatchStyle.ForwardDiagonal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Horizontal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.HorizontalBrick);
			this.cBoxHatchStyle.Items.Add(HatchStyle.LargeCheckerBoard);
			this.cBoxHatchStyle.Items.Add(HatchStyle.LargeConfetti);
			this.cBoxHatchStyle.Items.Add(HatchStyle.LargeGrid);
			this.cBoxHatchStyle.Items.Add(HatchStyle.LightDownwardDiagonal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.LightHorizontal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.LightUpwardDiagonal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.LightVertical);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Max);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Min);
			this.cBoxHatchStyle.Items.Add(HatchStyle.NarrowHorizontal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.NarrowVertical);
			this.cBoxHatchStyle.Items.Add(HatchStyle.OutlinedDiamond);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Percent05);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Percent10);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Percent20);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Percent25);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Percent30);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Percent40);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Percent50);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Percent60);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Percent70);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Percent75);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Percent80);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Percent90);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Plaid);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Shingle);
			this.cBoxHatchStyle.Items.Add(HatchStyle.SmallCheckerBoard);
			this.cBoxHatchStyle.Items.Add(HatchStyle.SmallConfetti);
			this.cBoxHatchStyle.Items.Add(HatchStyle.SmallGrid);
			this.cBoxHatchStyle.Items.Add(HatchStyle.SolidDiamond);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Sphere);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Trellis);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Vertical);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Wave);
			this.cBoxHatchStyle.Items.Add(HatchStyle.Weave);
			this.cBoxHatchStyle.Items.Add(HatchStyle.WideDownwardDiagonal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.WideUpwardDiagonal);
			this.cBoxHatchStyle.Items.Add(HatchStyle.ZigZag);
			this.cBoxHatchStyle.SelectedIndex=1;
		}
		
		[STAThread]
		public static void Main(string[] args)
		{
			Application.Run(new MainForm());
		}

		void SelectColorClick(object sender, System.EventArgs e)
		{
			ColorDialog clrDlg = new ColorDialog();
			clrDlg.Color = this.SelectColor.BackColor;
			if (clrDlg.ShowDialog() == DialogResult.OK)
			{
				this.SelectColor.BackColor = clrDlg.Color;
				this.Invalidate();
			}
			clrDlg.Dispose();
		}
		
		void SelectBKColorClick(object sender, System.EventArgs e)
		{
			ColorDialog clrDlg = new ColorDialog();
			clrDlg.Color = this.SelectBKColor.BackColor;
			if (clrDlg.ShowDialog() == DialogResult.OK)
			{
				this.SelectBKColor.BackColor = clrDlg.Color;
				this.Invalidate();
			}
			clrDlg.Dispose();
		}

		void Form_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
		{
			Graphics g = e.Graphics;
			// 物件轉換成其他類別
			HatchStyle selectedHatchStyle = (HatchStyle)Convert.ChangeType(
					this.cBoxHatchStyle.SelectedItem,typeof(HatchStyle));
			// Create a hatch brush with selected hatch style and colors
			HatchBrush brush = new HatchBrush(selectedHatchStyle,
					this.SelectColor.BackColor, this.SelectBKColor.BackColor);
			// Fill rectangle
			g.FillRectangle(brush, this.ClientRectangle);
			// Dispose of objects
			brush.Dispose();
		}

		void CBoxHatchStyleSelectedIndexChanged(object sender, System.EventArgs e)
		{
			this.Invalidate();
		}
	}
}

附件：ItemOfComboBox.cs