字典绑定到WPF的ListView [英] Dictionary Binding to ListView WPF
问题描述
我有一个包含字典项的列表。这意味着
列表[0] =字典项=>第[0] = ID，第[1] =名称，项目[2] =金额。
我需要在一个网格的方式ListView控件来显示这一点。这本词典可以有所不同。
更新：
在列表中每个项目看起来是这样的：
[_ ID] =11212131
[标题] =这是标题
[dateCreated会] =一些最新
更新2：
我用下面的code创建一个动态的GridView控件，然后添加到列GridView控件。它的工作原理，但现在有相同的周反复列的长水平线。我需要显示的列名，并根据该属于该列中的数据。
VAR的GridView =新的GridView（）; 的foreach（在OBJ文件变种O）
{
VAR DIC = O作为字典＆LT;弦乐，对象＆gt ;;
VAR枚举= dic.GetEnumerator（）;
而（enumerator.MoveNext（））
{
VAR电流= enumerator.Current;
VAR gridViewColumn =新GridViewColumn（）;
gridViewColumn.Header = current.Key;
VAR约束力=新绑定（current.Key）;
//binding.Source =电流; gridViewColumn.DisplayMemberBinding =绑定; gridview.Columns.Add（gridViewColumn）; } //新行 } lvCollections.View = gridview的;
更新3：
我是pretty接近。它的工作原理，但只显示一个长单排反复列。
VAR的GridView =新的GridView（）;
的foreach（在OBJ文件变种O）
{ VAR DIC = O作为字典＆LT;弦乐，对象＆gt ;;
VAR枚举= dic.GetEnumerator（）;
而（enumerator.MoveNext（））
{VAR gridViewColumn =新GridViewColumn（）;
VAR电流= enumerator.Current;
gridViewColumn.Header = current.Key;
VAR约束力=新绑定（）;
binding.Source =电流;
binding.Path =新的PropertyPath（值）; gridViewColumn.DisplayMemberBinding =绑定;
gridview.Columns.Add（gridViewColumn）; }
//新行 } lvCollections.ItemsSource = OBJ文件;
lvCollections.View = gridview的;
生成你的GridView列如下：
公共无效OnDataContextChanged（...）
{
VAR distinctKeys =（
从字典中（列表与LT;字典＆LT;字符串对象＆gt;＆GT;）的DataContext
从dict.Keys关键
选择键
）。不同（）; gridView.Columns.ReplaceWith（
从distinctKeys关键
关键的OrderBy
选择新GridViewColumn
{
标题=键，
DisplayMemberBinding =新的绑定（[+键+]），
}）;
}//以上code使用像这样的扩展方法
静态无效ReplaceWith＆LT; T＆GT;（这ObserableCollection＆LT; T＆GT;收集，IEnumerable的＆LT; T＆GT; newItems）
{
collection.Clear（）;
的foreach（在newItems VAR项）
collection.Add（项目）;
}
这会工作，除非你的词典键包含特殊字符。在进行此工作的关键是在绑定路径indxer语法来（在'['和']'）
I have a List which contains Dictionary items. This means
List[0] = Dictionary Item => Item[0] = id, Item[1] = Name, Item[2] = Amount.
I need to show this in a ListView control in a Grid manner. The dictionary can vary.
UPDATE:
Each Item in the List looks like this:
["_id"] = "11212131" ["Title"] = "this is title" ["DateCreated"] = "some date"
The items inside the dictionary can be different.
UPDATE 2:
I am using the following code to create a dynamic Gridview control and then add the columns into the GridView control. It works but now there is a long horizontal line of same repeative columns. I need to display the column name and under that the data that belongs to that column.
var gridview = new GridView();
foreach (var o in objs)
{
var dic = o as Dictionary<String, Object>;
var enumerator = dic.GetEnumerator();
while (enumerator.MoveNext())
{
var current = enumerator.Current;
var gridViewColumn = new GridViewColumn();
gridViewColumn.Header = current.Key;
var binding = new Binding(current.Key);
//binding.Source = current;
gridViewColumn.DisplayMemberBinding = binding;
gridview.Columns.Add(gridViewColumn);
}
// new row
}
lvCollections.View = gridview;
UPDATE 3:
I am pretty close. It works but it displays only a long single row with repeated columns.
var gridview = new GridView();
foreach (var o in objs)
{
var dic = o as Dictionary<String, Object>;
var enumerator = dic.GetEnumerator();
while (enumerator.MoveNext())
{var gridViewColumn = new GridViewColumn();
var current = enumerator.Current;
gridViewColumn.Header = current.Key;
var binding = new Binding();
binding.Source = current;
binding.Path = new PropertyPath("Value");
gridViewColumn.DisplayMemberBinding = binding;
gridview.Columns.Add(gridViewColumn);
}
// new row
}
lvCollections.ItemsSource = objs;
lvCollections.View = gridview;
Generate your GridView columns like this:
public void OnDataContextChanged(...)
{
var distinctKeys = (
from dict in (List<Dictionary<string,object>>)DataContext
from key in dict.Keys
select key
).Distinct();
gridView.Columns.ReplaceWith(
from key in distinctKeys
orderby key
select new GridViewColumn
{
Header = key,
DisplayMemberBinding = new Binding("[" + key + "]"),
});
}
// The above code uses an extension method like this
static void ReplaceWith<T>(this ObserableCollection<T> collection, IEnumerable<T> newItems)
{
collection.Clear();
foreach(var item in newItems)
collection.Add(item);
}
This will work unless your dictionary key contains special characters. The key to making this work is the indxer sytax in the binding path (the '[' and ']').
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