/// <summary>
/// 项目匹配事件
/// </summary>
/// <param name="e"></param>
protected virtual void OnMatch(MatchEventArgs e)
{
if (this.Match != null)
{
this.Match(this, e);
}
}
/// <summary>
/// 根据匹配规则,绑定下拉列表, 返回完全匹配项
/// </summary>
/// <returns>完全匹配项</returns>
private List <object> MatchAndSetListItems()
{
List <object> result = new List <object>();
this.box.DisplayMember = this.DisplayMember;
this.box.ValueMember = this.ValueMember;
this.box.BeginUpdate();
this.box.Items.Clear();
Graphics gh = this.box.CreateGraphics();
SizeF newSize = new SizeF();
if (this.Items != null)
{
for (int i = 0; i < this.Items.Count; i++)
{
object obj = this.Items[i];
if (obj != null)
{
object valObj = FilterItemOnProperty(obj, this.ValueMember);
string valueText = valObj == null ? "" : valObj.ToString();
string displayText = this.innerListBox.GetItemText(obj);
MatchEventArgs args = new MatchEventArgs();
args.Item = obj;
args.MatchText = this.Text;
args.MatchResult = displayText.StartsWith(this.Text) || valueText.StartsWith(this.Text);
args.EqualResult = displayText == this.Text || valueText == this.Text;
this.OnMatch(args);
//部分匹配
if (args.MatchResult)
{
this.box.Items.Add(obj);
if (this.AutoDropWidth)
{
//测量当前项目的宽度
SizeF currentSize = gh.MeasureString(displayText, this.box.Font);
newSize = newSize.Width > currentSize.Width ? newSize : currentSize;
}
}
//完全相等
if (args.EqualResult)
{
result.Add(obj);
}
}
}
this.box.SelectedItem = this.SelectedItem;
}
this.box.EndUpdate();
//计算宽度
newSize.Width += (this.box.Items.Count * this.box.ItemHeight > this.box.Height ? 18 : 0);
this.box.Width = Convert.ToInt32(newSize.Width > this.Width - 2 ? newSize.Width : this.Width - 2);
//设置列表高度, 小于 DropHeight, 收缩高度到刚好容下所有项目, 大于 DropHeight 或列表为空, 则高度为 DropHeight.
int sumHight = this.box.Items.Count == 0 ? this.DropHeight : this.box.Items.Count * this.box.ItemHeight;
this.box.Height = sumHight < this.DropHeight ? sumHight : this.DropHeight;
return(result);
}