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我有一个菜单,我从列表中填充,我希望子菜单动态显示,具体取决于从列表返回的内容。目前,我可以显示两个级别,并且我可以继续添加foreach循环以添加更多级别,但我希望能够动态调整,以便菜单不受逻辑中循环数量的限制。如何使菜单动态增长C#
public string CreateDynamicMenu()
{
HtmlGenericControl navbar = new HtmlGenericControl("nav");
navbar.Attributes.Add("class", "navbar navbar-default");
HtmlGenericControl containerDiv = new HtmlGenericControl("div");
containerDiv.Attributes.Add("class", "container-fluid");
HtmlGenericControl collapseDiv = new HtmlGenericControl("div");
collapseDiv.Attributes.Add("class", "collapse navbar-collapse");
HtmlGenericControl navUl = new HtmlGenericControl("ul");
navUl.Attributes.Add("class", "nav navbar-nav");
// mainMenuA.Attributes.Add("href", "~/Default.aspx");
var myMenu = menuListForUserG.GetMenus(Global.CurrentProfile.UserID).OrderBy(x => x.MenuOrder).ThenBy(y => y.MenuName);
var navbarmenu = myMenu.Where(x => x.ParentID == null);
foreach (var menuLevel1 in navbarmenu)
{
HtmlGenericControl dropdownLi = new HtmlGenericControl("li");
dropdownLi.Attributes.Add("class", "dropdown");
HtmlGenericControl mainMenuA = new HtmlGenericControl("a");
mainMenuA.Attributes.Add("href", "~/Default.aspx");
mainMenuA.InnerText = menuLevel1.MenuName;
dropdownLi.Controls.Add(mainMenuA);
var navbarsubmenu = myMenu.Where(x => x.ParentID == menuLevel1.MenuID);
if (navbarsubmenu.IsAny())
{
HtmlGenericControl dropdownUl = new HtmlGenericControl("ul");
dropdownUl.Attributes.Add("class", "dropdown-menu");
foreach (var menuLevel2 in navbarsubmenu)
{
HtmlGenericControl dropdownsubmenuLi = new HtmlGenericControl("li");
dropdownsubmenuLi.Attributes.Add("class", "dropdown-submenu");
HtmlGenericControl subMenuA = new HtmlGenericControl("a");
subMenuA.Attributes.Add("href", "~/Default.aspx");
subMenuA.InnerText = menuLevel2.MenuName;
dropdownsubmenuLi.Controls.Add(subMenuA);
dropdownUl.Controls.Add(dropdownsubmenuLi);
dropdownLi.Controls.Add(dropdownUl);
navUl.Controls.Add(dropdownLi);
}
}
}
collapseDiv.Controls.Add(navUl);
containerDiv.Controls.Add(collapseDiv);
navbar.Controls.Add(containerDiv);
StringBuilder htmlStringBuilder = new StringBuilder();
HtmlTextWriter htmlStringWriter = new HtmlTextWriter(new StringWriter(htmlStringBuilder));
navbar.RenderControl(htmlStringWriter);
String output = htmlStringBuilder.ToString();
return output;
}
你知道如何使用“递归”吗? – Enigmativity
您需要添加或重构您的方法以递归。具体而言,您将继续构建菜单,直到您的查询导致零孩子。 – pnm
这就是我困惑的地方,我不确定那会是什么样子。 – Nakres