Controls Validation

And for the controls validation, I would like to start a new User Control.

The goal is to create RANGE validation control, like:

<asp:RangeValidator range="B1-B45" datatype="Percentage" runat=server />
.
.
.
<asp:textbox id="B1" runat=server />

.

<asp:textbox id="B45" runat=server />

So I need also a datatype like integer, but also percentage.

I need also an another control for some calculations, like sum, substraction, division like

<asp:calcul operator="+" Range="B1-B45" runat=server id="MyTotal" />

OK, so I will start to build these controls, but if someone know a link where I can find them, why not.

Of course, I like the Open Source model, so if you know something like that for free with source, let me know.