/// <summary>
/// 向下拉框添加具有指定文本，值，名称的Item
/// </summary>
public void Add(String text, Object value = null, String name = null)
{
ComboboxToolStripItem item = new ComboboxToolStripItem();
item.Text = text;
item.Size = new Size(this._toolStripDropDown.Width, this.ItemHeight);
item.AutoSize = false;
item.Value = value;
item.Name = name ?? Guid.NewGuid().ToString("N");
item.Font = this.ItemFont;
item.Size = new Size(this._toolStripDropDown.Width, this.ItemHeight);
item.Index = this._toolStripDropDown.Items.Count - 1;
item.TextAlignFormat = this.TextAlignFormat;
item.Click += (s, e) =>
{
this.OnSelectItemChanged(this, item);
};
this._toolStripDropDown.Items.Add(item);
}
protected virtual void OnSelectItemChanged(Object sender, ComboboxToolStripItem item)
{
this.SelectedItem = item;
this.Text = this.SelectedItem.Text;
this.SelectItemChanged?.Invoke(sender, item);
}