Show only date and remove the time part in BoundField or ItemTemplate Eval of ASP.Net GridView

With ItemTemplate you need to do as following

    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
        <Columns>
            <asp:BoundField DataField="Item" />
            <asp:TemplateField>
                <ItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# Eval("Date", "{0:dd/MM/yyyy}") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>