ASP.Net/Validation by Function/Date

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Checking the Range of a Date through the RangeValidator Control (VB.net)

<%@ Page Language=VB Debug=true %>
<HTML>
<HEAD>
<TITLE>Checking the Range of a Date through the RangeValidator Control</TITLE>
</HEAD>
<form runat="server">
<BR><BR>
Enter a Date:<BR>
<asp:textbox 
    id="txtDate" 
    runat=server 
/>
<asp:RangeValidator 
    id="rngDate" 
    ControlToValidate="txtDate" 
    type="Date" 
    minimumvalue="1/1/1990"
    maximumvalue="12/31/1999"
    display="Dynamic"
    runat="server">
    The Date field must be from 1/1/1990 to 12/31/1999!
</asp:RangeValidator>
<BR><BR>
<asp:button 
    id="butOK"
    text="OK"
    type="Submit"
    runat="server"
/>
</form>
</BODY>
</HTML>



Comparing a Field to a Date Data Type using the CompareValidator Control (VB.net)

<%@ Page Language=VB Debug=true %>
<HTML>
<HEAD>
<TITLE>Comparing a Field to a Date Data Type using the CompareValidator Control</TITLE>
</HEAD>
<form runat="server">
<BR><BR>
Please enter a Date:<BR>
<asp:textbox 
    id="txtDate" 
    runat=server 
/>
<asp:comparevalidator 
    id="cvCheckDate" 
    controltovalidate="txtDate" 
    operator="DataTypeCheck" 
    type="Date" 
    runat="server"
>
    You must enter a date!
</asp:CompareValidator><BR><BR>
<asp:button 
    id="butOK"
    text="OK"
    type="Submit"
    runat="server"
/>
</form>
</BODY>
</HTML>



Validating for a Date in the Current Year Using the CustomValidator Control (VB.net)

<%@ Page Language=VB Debug=true %>
<script runat=server>
Sub Date_ServerValidation(source As object, E As ServerValidateEventArgs)
    If  IsDate(E.Value) Then
        If  Year(E.Value) = Year(Today) Then
            E.IsValid = True
        Else
            E.IsValid = False
        End If
    Else
        E.IsValid = False
    End If
End Sub
Sub SubmitBtn_Click(Sender As Object, E As EventArgs)
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Validating for a Date in the Current Year Using the CustomValidator Control</TITLE>
</HEAD>
<form runat="server">
<BR><BR>
Enter a date in the current year:<BR>
<asp:textbox 
    id="txtDate" 
    runat=server 
/>
<asp:customvalidator 
    id="customDate"
    controltovalidate="txtDate"
    onservervalidate="Date_ServerValidation"
    display="Dynamic"
    font-name="Verdana"
    font-bold="True"
    font-size="10pt"
    runat="server">
    You must enter a date in the current year!
</asp:CustomValidator>
<BR><BR>
<asp:button 
    id="butOK"
    text="OK"
    type="Submit"
    onclick="SubmitBtn_Click" 
    runat="server"
/>
</form>
</BODY>
</HTML>
Источник — «http://nfex.ru/index.php?title=ASP.Net/Validation_by_Function/Date&oldid=1541»