wpf controls - retrieve all datagrid rows in wpf -

i have datagrid follows;

mainwindow.xaml:

    <datagrid name="csvdatagrid" itemssource="{binding}" autogeneratecolumns="false" margin="20,5,0,0"  horizontalalignment="left"               grid.columnspan="4" grid.row="3" grid.column="0" selectionchanged="csvdatagrid_selectionchanged" width="560">         <datagrid.columns>             <datagridtextcolumn binding="{binding project}" header="project" width="50" />             <datagridtextcolumn binding="{binding description}" header="description" width="200"/>         </datagrid.columns>     </datagrid> 

mainwindow.xaml.cs

    private void submitbtn_click(object sender, routedeventargs e)     {         (int = 0; < csvdatagrid.items.count; i++)         {             datagridrow row = (datagridrow) csvdatagrid.itemcontainergenerator.containerfromindex(i);             if (row != null)             {                 object[] itemarray = ((system.data.datarowview) (row.item)).row.itemarray;                 messagebox.show(string.format("row = {0},{1},{3}",                                               itemarray[0].tostring(),                                               itemarray[1].tostring(),                                                                             i));             }         }     } 

when user clicks button, want retrieve data every row. works visible rows. how can data?