1：读取父级下的所有子类别
*ViewBag.ParentItemList：不能与ParentId相同
private void ParentDropDownList()
{
List<SAS.Model.BPMS_SysMenu> list = new List<SAS.Model.BPMS_SysMenu>();
StringBuilder strWhere = new StringBuilder();
List<SelectListItem> selectList = new List<SelectListItem>();
list = bll.GetModelList(strWhere.ToString());
foreach (var item in list)
{
if (item.ParentId.Equals(""))
{
var parentList = bll.GetModelList(strWhere.ToString()).Where(d => d.ParentId == item.MenuId);
foreach (var plitem in parentList)
{
string parentName = plitem.FullName;
string parentId = plitem.MenuId.ToString();
selectList.Add(new SelectListItem
{
Text = "├-" + parentName,
Value = parentId
});
string pid = parentId;
string tag = " |- ";
ChildrenList(pid, tag, selectList);
}
ViewBag.ParentItemList = new SelectList(selectList, "Value", "Text");
}
} }
2：遍历读取所有子类别下的孙类别。
private void ChildrenList(string pid, string tag, List<SelectListItem> selectList)
{
StringBuilder strWhere = new StringBuilder();
var childrenList = bll.GetModelList(strWhere.ToString()).Where(d => d.ParentId == pid);
foreach (var clitem in childrenList)
{
string clname = tag + clitem.FullName;
string clid = clitem.MenuId.ToString();
selectList.Add(new SelectListItem
{
Text = clname,
Value = clid
});
string pid2 = clid;
string tag2 = tag + " -- ";
ChildrenList(pid2, tag2, selectList);
}
}
3：在需要的地方调用父类方法
public ActionResult Edit(string id)
{
ViewBag.ControllerName = RouteData.Values["controller"].ToString().ToLower();
var model = new SAS.Model.BPMS_SysMenu();
model=bll.GetModel(id);
if (model != null)
{
ParentDropDownList();
return View(model);
}
else
{
return View("");
}
}
4:在页面调用
<div class="form-group">
<label class="col-md-3 control-label">上级模块</label>
<div class="col-md-4">
@Html.DropDownListFor(model => model.ParentId, ViewBag.ParentItemList as IEnumerable<SelectListItem>, new { @class = "form-control" })
<span class="help-block">
</span>
</div>
</div>
效果如下：
