c# - How to add empty row to the DataGrid? -

i need allow user add information directly in datagrid put "canuseraddrows" property not work, appears follows:

this datagrid:

<datagrid x:name="dtgpersons" grid.row="3" canuseraddrows="true">      <datagrid.columns>          <datagridtextcolumn header="n°" width="*" />          <datagridtextcolumn header="name" width="*" />          <datagridtextcolumn header="carrer" width="*" />          <datagridtextcolumn header="group" width="*" />          <datagridtextcolumn header="age" width="*" />      </datagrid.columns>  </datagrid> 

edit

this new grid code:

<datagrid x:name="dtgperson" grid.row="3" itemssource="{binding lstperson}" autogeneratecolumns="false" canuseraddrows="true">      <datagrid.columns>          <datagridtextcolumn header="n°" width="*" binding="{binding no}" />          <datagridtextcolumn header="name" width="*" binding="{binding name}" />          <datagridtextcolumn header="carrer" width="*" binding="{binding carrer}" />          <datagridtextcolumn header="group" width="*" binding="{binding group}" />          <datagridtextcolumn header="age" width="*" binding="{binding age}" />      </datagrid.columns> </datagrid> 

and code behind: observablecollection:

public observablecollection<person> lstperson { get; set; } 

my mainwindow

public mainwindow() {      initializecomponent();      datacontext = this;      lstperson = new observablecollection<person>(); } 

my person class

public class person {     public int no { get; set; }     public string name { get; set; }     public string carrer { get; set; }     public string group { get; set; }     public int age { get; set; } } 

1) change grid xaml

   <datagrid itemssource="{binding gridcollection}"               canuseraddrows="true"               autogeneratecolumns="false">         <datagrid.columns>             <datagridtextcolumn header="n°" binding="{binding number}" width="*" />             <datagridtextcolumn header="name" binding="{binding name}" width="*" />             <datagridtextcolumn header="carrer" binding="{binding career}" width="*" />             <datagridtextcolumn header="group" binding="{binding group}" width="*" />             <datagridtextcolumn header="age" binding="{binding age}" width="*" />         </datagrid.columns>     </datagrid> 

2) define collection in viewmodel or codebehind

public observablecollection<griddatamodel> gridcollection { get; set; } 

3) init collection before use

public mainwindow() {     initializecomponent();     datacontext = this;     gridcollection = new observablecollection<griddatamodel>(); } 

4) after this, can add items in grid via gui , store in collection