标签:tran graphic cat cto ack const set dbr class
介绍 我们都喜欢能控制更多的颜色或图像,我也一样。 在本文中,我为自定义ListBox类中的每个项提供了一个image属性。 注意:我的文章没有源代码,因为它非常简短和容易。 首先:我们为GListBox创建了两个类 隐藏,收缩,复制Code
// GListBoxItem
class public class GListBoxItem { private string _myText; private int _myImageIndex; // properties public string Text { get {return _myText;} set {_myText = value;} } public int ImageIndex { get {return _myImageIndex;} set {_myImageIndex = value;} } //constructor public GListBoxItem(string text, int index) { _myText = text; _myImageIndex = index; } public GListBoxItem(string text): this(text,-1){} public GListBoxItem(): this(""){} public override string ToString() { return _myText; } }//End of GListBoxItem class // GListBox class public class GListBox : ListBox { private ImageList _myImageList; public ImageList ImageList { get {return _myImageList;} set {_myImageList = value;} } public GListBox() { // Set owner draw mode this.DrawMode = DrawMode.OwnerDrawFixed; } protected override void OnDrawItem(System.Windows.Forms.DrawItemEventArgs e) { e.DrawBackground(); e.DrawFocusRectangle(); GListBoxItem item; Rectangle bounds = e.Bounds; Size imageSize = _myImageList.ImageSize; try { item = (GListBoxItem) Items[e.Index]; if (item.ImageIndex != -1) { imageList.Draw(e.Graphics, bounds.Left,bounds.Top,item.ImageIndex); e.Graphics.DrawString(item.Text, e.Font, new SolidBrush(e.ForeColor), bounds.Left+imageSize.Width, bounds.Top); } else { e.Graphics.DrawString(item.Text, e.Font,new SolidBrush(e.ForeColor), bounds.Left, bounds.Top); } } catch { if (e.Index != -1) { e.Graphics.DrawString(Items[e.Index].ToString(),e.Font, new SolidBrush(e.ForeColor) ,bounds.Left, bounds.Top); } else { e.Graphics.DrawString(Text,e.Font,new SolidBrush(e.ForeColor), bounds.Left, bounds.Top); } } base.OnDrawItem(e); } }//End of GListBox class
在那之后,为了使用我们的代码,我们可以做: 隐藏,复制Code
GListBox lb = new GListBox(); lb.ImageList = imageList; lb.Items.Add( new GListBoxItem("Image 1",0)); lb.Items.Add( new GListBoxItem("Image 2",1)); lb.Items.Add( new GListBoxItem("Image 3",2));
以上就是全部内容,谢谢大家的阅读。 本文转载于:http://www.diyabc.com/frontweb/news336.html
标签:tran graphic cat cto ack const set dbr class
原文地址:https://www.cnblogs.com/Dincat/p/13437691.html