how to avoid the page going to server side when textbox with attribut AllowBlank="false" is empty

[harshad.jadhav]

Hello,
I have one textbox with attribute AllowBlank="false". if i dont put any value in that textbox and click on the add button it is going sever.
how to avoid that id it should not go to server since it does not contain value. Same thing for MinLength="5".

code is as follows...

<ext:Panel ID="PanelColumnDetails" runat="server" Frame="true" Title="Column Details"
        AutoWidth="true" AutoScroll="true" Header="true" Border="false" Width="600" Height="1001">
        <Content>
            <table border="1" cellpadding="1" cellspacing="1">
                <tr>
                    <td>
                        <ext:TextField ID="txtFirst" AllowBlank="false" MinLength="5" MaxLength="5" runat="server">
                        </ext:TextField>
                    </td>
                </tr>
                <tr>
                    <td>
                        <ext:Button ID="btnAdd" runat="server" Text="Add">
                            <DirectEvents>
                                <Click OnEvent="btnAdd_Click" ViewStateMode="Enabled">
                                </Click>
                            </DirectEvents>
                        </ext:Button>
                    </td>
                </tr>
            </table>
        </Content>
    </ext:Panel>

Thanks and Regards

Harshad Jadhav

[Daniil]

Hi,

Returning false either from a respective Listener or DirectEvent's Before handler stops DirectEvent.

[harshad.jadhav]

hi danill,

Can you tell me how to do that with above example.....

Thanks and Regards
harshad

[Daniil]

Hi,

Example

<ext:Button runat="server" Text="Add">
    <Listeners>
        <Click Handler="return txtFirst.isValid();"/>
    </Listeners>
    <DirectEvents>
        <Click OnEvent="btnAdd_Click" />
    </DirectEvents>
</ext:Button>