這篇己發表在 http://spaces.msn.com/members/sharedllee/Blog/cns!1piXfMYLqs5r4KsbrEKIJqYQ!139.entry 測試一下天空貼程式碼的能力
/* * Created by 記事本 
* User: Lee, Dong-Liang * Date: 2005/06/25 */ 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。 // <2005-06-25> 使用列舉的方式取得列表。 Array hsList = Enum.GetValues( typeof( HatchStyle ) ); foreach ( HatchStyle hs in hsList ) this.cBoxHatchStyle.Items.Add(hs); 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(); } } }