我的Windows应用程序中有一个组合框,它是DataBound到一个只读列表。我的要求是根据列表的属性显示Bold中的一些项目。该属性与value member和Display Member的属性不同。无论如何都没有循环遍历每个项目,因为列表太大了?
答案 0 :(得分:2)
关闭所选项目。
public Form1()
{
_dataItems = new List<DataItem>
{
new DataItem {Name = "Alpha", IsBold = true, OtherData = new object()},
new DataItem {Name = "Beta", IsBold = false, OtherData = new object()},
new DataItem {Name = "Gamma", IsBold = true, OtherData = new object()},
};
this.InitializeComponent();
comboBox1.DrawItem += comboBox1_DrawItem;
comboBox1.DataSource = _dataItems;
comboBox1.DisplayMember = "Name";
comboBox1.ValueMember = "OtherData";
}
void comboBox1_DrawItem(object sender, DrawItemEventArgs e)
{
var dataItem = (DataItem)comboBox1.Items[e.Index];
if (dataItem.IsBold)
e.Graphics.DrawString(dataItem.Name, BoldFont, SystemBrushes.ControlText,
e.Bounds);
else
e.Graphics.DrawString(dataItem.Name, NormalFont, SystemBrushes.ControlText,
e.Bounds);
}
DataItem类:
public class DataItem
{
public String Name { get; set; }
public bool IsBold { get; set; }
public Object OtherData { get; set; }
public override string ToString()
{
return Name;
}
}