DevExpress 的幫助文檔是在太缺乏了,他自己的幫助只有簡單描述,沒有樣例,而它的網站上的在線幫助只有利用它的設計器設計的ToolBar、PopupMenu ,沒有利用代碼開發的。
雖然要利用代碼開發,可以參照它設計器背后的代碼,但還是有些區別的。我最近就碰見了問題:
我通過反射初始化BarButtonItem,BarSubItem按鈕實例,最后在主程序把這些按鈕加到ToolBar上:
在用反射實例化BarSubItem時,要用該方法:
BarSubItem newItem = new BarSubItem();
newItem.Name = intMenuItemCount.ToString();
newItem.Id = intMenuItemCount++;
newMenu.LinksPersistInfo.Add(new DevExpress.XtraBars.LinkPersistInfo((BarItem)item, beginGroup));
這里要注意:
1、Id必須唯一。
2、不要使用newMenu.AddItem((BarItem)item),這個方法會引起很多問題,如:beginGroup菜單分組無法實現, 我試圖通過以下方法實現,但還是徒勞,而且有些編輯菜單不能使用該方法,如:BarToolbarsListItem工具欄列表菜單
BarItemLink itemLink = newMenu.AddItem((BarItem)item);
itemLink.BeginGroup = beginGroup;
3、在將實例化的BarSubItem加到ToolBar以后,還要遞歸把BarSubItem以及它的子菜單加入BarManager。
private void AddMenuItem(DevExpress.XtraBars.BarItem menuItem)
{
if (menuItem != null)
{
//如果是編輯框工具條時使用
if (menuItem is BarEditItem)
{
this.BarMenuManager.RepositoryItems.Add((menuItem as BarEditItem).Edit);
}
this.BarMenuManager.Items.Add(menuItem);
if (menuItem is DevExpress.XtraBars.BarSubItem)
{
DevExpress.XtraBars.LinksInfo linksInfo = (menuItem as DevExpress.XtraBars.BarSubItem).LinksPersistInfo;
for (int i = 0; i < linksInfo.Count; i++)
{
AddMenuItem((BarItem)linksInfo[i].Item);
}
}
}
4、如果右鍵菜單也是通過反射實現的,那么在加載右鍵菜單時需要注意:
public PopupMenu CreateContextMenu
{
PopupMenu contextMenu = new PopupMenu();
contextMenu.Popup += new EventHandler(ContextMenuPopupHandler);
foreach (object item in buildItems)
{
if (item is BarItem)
{
bool beginGroup = false;
beginGroup = (bool)(item as BarItem).Tag;
//contextMenu.LinksPersistInfo.AddRange(new LinkPersistInfo[] { new LinkPersistInfo((item as BarItem), beginGroup) });
BarItem barItem = item as BarItem;
AddMenuItem(barManager, barItem);
//用LinksPersistInfo右鍵菜單不出來
//contextMenu.LinksPersistInfo.Add(new LinkPersistInfo(barItem, beginGroup));
BarItemLink itemLink = contextMenu.AddItem(barItem);
itemLink.BeginGroup = beginGroup;
}
}
contextMenu.Manager = barManager;
return contextMenu;
}
//在此方法中注意 BarItemLink itemLink = (menuItem as BarSubItem).AddItem(item);此方法看似又多加了菜單,但實際不然,如果不用該方法,右鍵菜單中的菜單有子菜單時會無法顯示。我就是讓這個問題耗了我很多事間
private void AddMenuItem(DevExpress.XtraBars.BarManager barManager,DevExpress.XtraBars.BarItem menuItem)
{
if (menuItem != null)
{
barManager.Items.Add(menuItem);
if (menuItem is DevExpress.XtraBars.BarSubItem)
{
DevExpress.XtraBars.LinksInfo linksInfo = (menuItem as DevExpress.XtraBars.BarSubItem).LinksPersistInfo;
int count = linksInfo.Count;
for (int i = 0; i < count; i++)
{
BarItem item = (BarItem)linksInfo[i].Item;
item.Manager = barManager;
BarItemLink itemLink = (menuItem as BarSubItem).AddItem(item);
itemLink.BeginGroup = linksInfo[i].BeginGroup;
AddMenuItem(barManager, item);
}
}
}
}