DataFormatString doesn't seem to work

[StuartLittle]

I am using the latest Telerik.

My RadGrid has a date column and I am trying to format it but it doesn't work.

<telerik:RadGrid RenderMode="Lightweight" runat="server" ID="RadGrid1" AllowPaging="True" AllowSorting="true" OnInit="RadGrid1_Init" 
                                PageSize="15"   AllowFilteringByColumn="true"   OnNeedDataSource="RadGrid1_NeedDataSource" OnPreRender="RadGrid1_PreRender" Font-Size="Small">
                
                <MasterTableView>
                    <Columns>
                        <telerik:GridDateTimeColumn DataField="BillDate" UniqueName="BillDateColumn1" DataFormatString="{0:dd/MM/yyyy}"  HeaderText="Bill Date1" />
                        <telerik:GridBoundColumn DataType="System.DateTime" DataField="BillDate" UniqueName="BillDateColumn2" DataFormatString="{0:dd/MM/yyyy}"  HeaderText="Bill Date2" /> 
                    </Columns>
                </MasterTableView>
            </telerik:RadGrid>

 

In both columns, I get format like 4/30/2017 12:00:00 AM instead of just 4/30/2017.

Is there anything I am missing here?

[StuartLittle]

Please delete the question.

By mistake, I had set the datatype of date as string in the class definition.