[英]C# List Group And Subgroup to TreeView
我有一個自定義項目:
List<Class_Items_Data> All_Items_List = new List<Class_Items_Data>();
public class Class_Items_Data
{
public string item_category { get; set; }
public string item_sub_category { get; set; }
public string item_name { get; set; }
}
例如 :
item_category = "Food" , item_sub_category = "Main Dish" , item_name = "A" };
item_category = "Beverage", item_sub_category = "Hot Drink" , item_name = "B" };
item_category = "Food" , item_sub_category = "Soup" , item_name = "C" };
item_category = "Beverage", item_sub_category = "Cold Drink", item_name = "D" }
我想將它們放在Treeview中,以顯示以下結果:
編輯#
我正在使用Winform
到目前為止,我已經嘗試過此操作(顯示正確值的消息框)
var ItemsGroups = All_Items_List
.GroupBy(x => new { Group = x.item_category_group, Category = x.item_category})
.GroupBy(x => new { Group = x.Key.Group }).OrderBy(x => x.Key.Group);
foreach (var Group in ItemsGroups)
{
MessageBox.Show("Group : " + Group.Key.Group);
foreach (var Category in Group)
{
MessageBox.Show("SubCategory : " + Category.Key.Category);
foreach (var Item in Category)
{
MessageBox.Show("Item : " + Item.item_name_original);
}
}
}
將循環更改為
foreach (var Group in ItemsGroups) {
TreeNode groupNode = treeView1.Nodes.Add(Group.Key.Group);
foreach (var Category in Group) {
TreeNode categoryNode = groupNode.Nodes.Add(Category.Key.Category);
foreach (var Item in Category) {
categoryNode.Nodes.Add(Item.item_name_original);
}
}
}
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