0 is displayed though the value is Null

We have implemented the grid list. The int value seems to be displayed as 0 though the data is null in the database(SQL server).

Are there any way to not display 0 when null other than changing to string value?
We are using EXT.net 4.8.3.

Code:

---

<ext:GridPanel ID="GridPanelA"
    runat="server" ColumnLines="true" TitleCollapse="true"
    Region="Center" EnableColumnMove="false" EnableColumnHide="false">
    <Store>
        <ext:Store ID="StoreId" runat="server" PageSize="20">
            <Model>
                <ext:Model runat="server">
                    <Fields>
                        <ext:ModelField Name="Float1" Type="Float" />
                        <ext:ModelField Name="Float2" Type="Float" />
                        <ext:ModelField Name="Int1" Type="Int" />
                        <ext:ModelField Name="Int2" Type="Int" />
                        <ext:ModelField Name="Int3" Type="Int" />
                    </Fields>
                </ext:Model>
            </Model>
        </ext:Store>
    </Store>
    <ColumnModel runat="server">
        <Columns>
            <ext:Column runat="server" Text="GroupA">
                <Defaults>
                    <ext:Parameter Name="Sortable" Value="true" />
                    <ext:Parameter Name="Align" Value="Center" />
                </Defaults>
                <Columns>
                    <ext:Column runat="server" ID="FloatA" Text="FloatA" DataIndex="Float1" Width="150" />
                    <ext:Column runat="server" ID="FloatB" Text="FloatB" DataIndex="Float2" Width="150" />
                    <ext:Column runat="server" ID="IntA" Text="IntA" DataIndex="Int1" Width="100" />
                    <ext:Column runat="server" ID="IntB" Text="IntB" DataIndex="Int2" Width="100" />
                    <ext:Column runat="server" ID="IntC"Text="IntC"  DataIndex="Int3" Width="120" />
                </Columns>
            </ext:Column>
        </Columns>
    </ColumnModel>
    <BottomBar>
        <ext:PagingToolbar runat="server">
        </ext:PagingToolbar>
    </BottomBar>
    <SelectionModel>
        <ext:CheckboxSelectionModel runat="server" Mode="Multi" />
    </SelectionModel>
</ext:GridPanel>

---

Hello @mkomiyama, and welcome to Ext.NET!

Have you tried adding AllowNull="true" to your ext:ModelField lines?

Here's a discussion that may interest you (although it is related to charts, it involves stores with null values):

Handle null values as gaps in a Line Chart

Hope this helps!

p.s.: please do not attach code samples as .txt files (do not attach at all), add them as code blocks so we can see it; we almost missed your one here.

Now we can show blank.
Thank you for your help.

Please mark as [CLOSED].