问题
Is it possible in WPF to bind a ListView (NOT a DataGrid) to a Matrix (Cross-Tab) DataSet in which the columns are unknown beforehand?
Using the Northwind database as an example: the simple query below will return a wellknown dataset which can easily be bound to a listview:
SELECT Year(o.OrderDate) AS [Year], Month(o.OrderDate) AS [Month],
COUNT(o.OrderID) AS [NumOrders]
FROM Orders o
GROUP BY Year(o.OrderDate), Month(o.OrderDate)
ORDER BY 1, 2
To generate a more meaningful report, we might run the result set from the above query (in a reporting program) to generate some thing as below shown below:
SELECT [Year],
SUM(CASE [Month] WHEN 1 Then NumOrders ELSE 0 END) AS 'Jan',
SUM(CASE [Month] WHEN 2 Then NumOrders ELSE 0 END) AS 'Feb',
SUM(CASE [Month] WHEN 3 Then NumOrders ELSE 0 END) AS 'Mar',
SUM(CASE [Month] WHEN 4 Then NumOrders ELSE 0 END) AS 'Apr',
SUM(CASE [Month] WHEN 5 Then NumOrders ELSE 0 END) AS 'May',
SUM(CASE [Month] WHEN 6 Then NumOrders ELSE 0 END) AS 'Jun',
SUM(CASE [Month] WHEN 7 Then NumOrders ELSE 0 END) AS 'Jul',
SUM(CASE [Month] WHEN 8 Then NumOrders ELSE 0 END) AS 'Aug',
SUM(CASE [Month] WHEN 9 Then NumOrders ELSE 0 END) AS 'Sep',
SUM(CASE [Month] WHEN 10 Then NumOrders ELSE 0 END) AS 'Oct',
SUM(CASE [Month] WHEN 11 Then NumOrders ELSE 0 END) AS 'Nov',
SUM(CASE [Month] WHEN 12 Then NumOrders ELSE 0 END) AS 'Dec'
FROM
(
SELECT Year(o.OrderDate) AS [Year], Month(o.OrderDate) AS [Month],
COUNT(o.OrderID) AS [NumOrders]
FROM Orders o
GROUP BY Year(o.OrderDate), Month(o.OrderDate)
)t0
GROUP BY [Year]
Which results into something like this:
My question is, It it possible to bind this final result to a ListView or a Flowdocument in WPF without having prior knowledge of the resulting columns?
回答1:
You can add columns dynamically to a ListView by using Attached Properties. Check out this article on the CodeProject it explains exactly that...
WPF DynamicListView - Binding to a DataMatrix
回答2:
You can generate the GridViewColumns for the ListView programatically and apply the binding to that. Loop through the columns in the DataSet and add a corresponding GridViewColumn into the ListView.
var gridView = (GridView)list.View;
foreach(var col in table.Columns) {
gridView.Columns.Add(new GridViewColumn{
Header=col.ColumnName,
DisplayMemberBinding=new Binding(col.ColumnName)});
}
来源:https://stackoverflow.com/questions/853710/in-wpf-can-you-bind-a-listview-not-datagrid-to-a-matrix-cross-tab-dataset