xaml - .Net 4 WPF DataGrid's ItemsSource - works programmatically, but not declaratively -

xaml - .Net 4 WPF DataGrid's ItemsSource - works programmatically, but not declaratively -

i writing wpf programme using c# , targeting .net 4.0. trying follow mvvm pattern, view (code-behind) has minimal-to-no code.

i have list<myrecord> want display in gui using datagrid. in xaml, have following:

<datagrid x:name="recordgrid" ...> <datagrid.columns> <datagridtextcolumn binding="{binding recid}" header="record id"/> <datagridtextcolumn binding="{binding name}" header="name"/> </datagrid.columns> </datagrid>

all that's left bind grid info collection.

when bind in code-behind file, works fine:

recordgrid.itemssource = myrecordlist;

however, prefer bind declaratively in xaml. tried this:

<datagrid x:name="recordgrid" itemssource="{binding myrecordlist}" ...>

but silently doesn't work. there no xaml binding error message when datagrid loads. set breakpoint on myrecordlist's get method, , it's never invoked long itemssource defined declaratively.

how can datagrid pull myrecordlist via xaml?

you need set datacontext if want binding work... mvvm pattern has view , viewmodel. view ui - e.g. window (let's phone call mainwindow) , viewmodel have recordgrid property , theother commands/properties (let's phone call class mainwindowviewmodel)

you need connect them both, done specifying in view, datacontext (in our case mainwindowviewmodel class).

so you'll want in view's constructor:

public mainwindow() { this.datacontext = new mainwindowviewmodel(); initializecomponent();

.net xaml mvvm wpfdatagrid