If you have using Ajax control toolkits a lot (which I will skip
the parts on where to download and how to configure it in Visual Studio 2010), you might have encountered some bugs or limitations
of the controls, or rather, some weird behaviours. I would call them weird behaviours though.
Recently, I've been working on a Ajax numeric updown control, which i remember clearly it was working fine without problems. In fact, I use 2 numeric updown control this time.
So I went on to configure it to be as simple as possible and I will just use
the default up and down buttons provided by it (so that I won't need to design my own). I have two textbox controls to display
the value controlled by
the updown control. One for
month, and another for year.
<asp:TextBox ID="txtMonth" runat="server" CssClass="txtNumeric" ReadOnly="True" Width="150px" />
<asp:TextBox ID="txtYear" runat="server" CssClass="txtNumeric" ReadOnly="True" Width="150px" />
So I will now drop 1 numeric updown control for each
of the textboxes.
<asp:NumericUpDownExtender ID="txtMonth_NumericUpDownExtender"
runat="server" TargetControlID="txtMonth" Maximum="12" Minimum="1" Width="152">
</asp:NumericUpDownExtender>
<asp:NumericUpDownExtender ID="txtYear_NumericUpDownExtender"
runat="server" TargetControlID="txtYear" Width="152">
</asp:NumericUpDownExtender>
You noticed that I configure
the Maximum and Minimum value for
the first numericupdown control, but I never did
the same for
the second one (for txtYear). That's because it won't work, well, at least for me.
So I remove
the Minimum="2000" and Maximum="2099" from there. Then I would configure
the initial value to
the the current year, and let
the year to flow up and down freely. If you want, you want write
the codes to restrict it.
Here are
the codes I used on PageLoad:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
If Trim(txtMonth.Text) = "" Then
Me.txtMonth.Text = System.DateTime.Today.
Month
End If
If Trim(txtYear.Text) = "" Then
Me.txtYear.Text = System.DateTime.Today.Year
End If
End If
End Sub
Enjoy!
