I have a boolean value in a datatable that i bind to a datagrid from the codebehind. But instead of a checkbox the webDataGrid displays "true" or "false" and that column is editable like a string value.

Here is some code that i'm using (_sestevalniDT is a DataTable and SestevalniStevec is a WebDataGrid):

_sestevalniDT = new DataTable();

_sestevalniDT.Columns.Add(new DataColumn("Naziv", typeof(string)));

_sestevalniDT.Columns.Add(new DataColumn("Popravek", typeof(bool)));

...

SestevalniStevec.DataSource = _sestevalniDT;

SestevalniStevec.DataBind();

and this is from my aspx:

<ig:WebDataGrid ID="SestevalniStevec" runat="server" StyleSetName="Appletini" Width="640"
                                                Height="480" DataKeyFields="Naziv">
                                                <Behaviors>
                                                    <ig:ColumnResizing Enabled="true">
                                                        <ColumnSettings>
                                                            <ig:ColumnResizeSetting EnableResize="true" />
                                                        </ColumnSettings>
                                                    </ig:ColumnResizing>
                                                    <ig:EditingCore>
                                                        <Behaviors>
                                                            <ig:CellEditing Enabled="true" EditModeActions-MouseClick="Single">
                                                                <CellEditingClientEvents EnteringEditMode="svoEnteringEditMode" />
                                                            </ig:CellEditing>
                                                        </Behaviors>
                                                    </ig:EditingCore>
                                                </Behaviors>
                                            </ig:WebDataGrid>

What should i add in order for the bool value to display as a checkbox?

Thanks for your help.