Custom Client-Side Validation in Web User Control

[Stuart Whiteford]

Guys,

I have a custom validator that has the default property ControlToValidate
plus one called SecondControlToValidate that I have created, like so...

<ows:eitherorvalidator id="eovNumberName" runat="server"
ControlToValidate="txtNumber" SecondControlToValidate="txtName"
EnableClientScript="True"></ows:eitherorvalidator>

....in my Validator Class I have the following...

Protected eitherOrSecondControlToValidate As String

Public Property SecondControlToValidate() As String
Get
Return eitherOrSecondControlToValidate
End Get
Set(ByVal Value As String)
eitherOrSecondControlToValidate = Value
End Set
End Property

Protected Overrides Sub AddAttributesToRender(ByVal writer As
HtmlTextWriter)
If (Me.DetermineRenderUplevel And Me.EnableClientScript) Then
MyBase.AddAttributesToRender(writer)
writer.AddAttribute("secondcontroltovalidate",
Me.SecondControlToValidate)
End If
End Sub

All this works fine when the textboxes and validator is straight on the
page, but I can't get it working in a Web User Control. I know about
UniqueID and ClientID but what I don't know is how get the ClientID from the
string being passed in so I can use it in the AddAttributesToRender Sub (or
should I be passing in a Control instead).

Mucho head scratching.

TIA,
Stuart.

[Peter Blum]

When providing a control's ID to the client side, always use the ClientID
property as it is the value represented in the id= attribute of the HTML
generated. Use FindControl() to get the control itself.

Dim vOtherControl =
Me.NamingContainer.FindControl(Me.SecondControlToV alidate) ' this will
throw an exception if not found. So use Try..Catch
writer.AddAttribute("secondcontroltovalidate", vOtherControl.ClientID)

--- Peter Blum
[url]www.PeterBlum.com[/url]
Email: [email]PLBlum@PeterBlum.com[/email]
Creator of "Professional Validation And More" at
[url]http://www.peterblum.com/vam/home.aspx[/url]

"Stuart Whiteford" <stuart-nospam-whiteford@firenet.uk.com> wrote in message
news:uECBI%23V%23DHA.2180@TK2MSFTNGP09.phx.gbl...

> Guys,
>
> I have a custom validator that has the default property ControlToValidate
> plus one called SecondControlToValidate that I have created, like so...
>
> <ows:eitherorvalidator id="eovNumberName" runat="server"
> ControlToValidate="txtNumber" SecondControlToValidate="txtName"
> EnableClientScript="True"></ows:eitherorvalidator>
>
> ...in my Validator Class I have the following...
>
> Protected eitherOrSecondControlToValidate As String
>
> Public Property SecondControlToValidate() As String
> Get
> Return eitherOrSecondControlToValidate
> End Get
> Set(ByVal Value As String)
> eitherOrSecondControlToValidate = Value
> End Set
> End Property
>
> Protected Overrides Sub AddAttributesToRender(ByVal writer As
> HtmlTextWriter)
> If (Me.DetermineRenderUplevel And Me.EnableClientScript) Then
> MyBase.AddAttributesToRender(writer)
> writer.AddAttribute("secondcontroltovalidate",
> Me.SecondControlToValidate)
> End If
> End Sub
>
> All this works fine when the textboxes and validator is straight on the
> page, but I can't get it working in a Web User Control. I know about
> UniqueID and ClientID but what I don't know is how get the ClientID from

the

> string being passed in so I can use it in the AddAttributesToRender Sub

(or

> should I be passing in a Control instead).
>
> Mucho head scratching.
>
> TIA,
> Stuart.
>
>

[Stuart Whiteford]

Peter,

Managed to get this working.

Thanks,
Stuart.


"Peter Blum" <PLBlum@Blum.info> wrote in message
news:eljXjmm%23DHA.2512@TK2MSFTNGP11.phx.gbl...

> When providing a control's ID to the client side, always use the ClientID
> property as it is the value represented in the id= attribute of the HTML
> generated. Use FindControl() to get the control itself.
>
> Dim vOtherControl =
> Me.NamingContainer.FindControl(Me.SecondControlToV alidate) ' this will
> throw an exception if not found. So use Try..Catch
> writer.AddAttribute("secondcontroltovalidate", vOtherControl.ClientID)
>
> --- Peter Blum
> [url]www.PeterBlum.com[/url]
> Email: [email]PLBlum@PeterBlum.com[/email]
> Creator of "Professional Validation And More" at
> [url]http://www.peterblum.com/vam/home.aspx[/url]
>
> "Stuart Whiteford" <stuart-nospam-whiteford@firenet.uk.com> wrote in

message

> news:uECBI%23V%23DHA.2180@TK2MSFTNGP09.phx.gbl...

> > Guys,
> >
> > I have a custom validator that has the default property

ControlToValidate

> > plus one called SecondControlToValidate that I have created, like so...
> >
> > <ows:eitherorvalidator id="eovNumberName" runat="server"
> > ControlToValidate="txtNumber" SecondControlToValidate="txtName"
> > EnableClientScript="True"></ows:eitherorvalidator>
> >
> > ...in my Validator Class I have the following...
> >
> > Protected eitherOrSecondControlToValidate As String
> >
> > Public Property SecondControlToValidate() As String
> > Get
> > Return eitherOrSecondControlToValidate
> > End Get
> > Set(ByVal Value As String)
> > eitherOrSecondControlToValidate = Value
> > End Set
> > End Property
> >
> > Protected Overrides Sub AddAttributesToRender(ByVal writer As
> > HtmlTextWriter)
> > If (Me.DetermineRenderUplevel And Me.EnableClientScript) Then
> > MyBase.AddAttributesToRender(writer)
> > writer.AddAttribute("secondcontroltovalidate",
> > Me.SecondControlToValidate)
> > End If
> > End Sub
> >
> > All this works fine when the textboxes and validator is straight on the
> > page, but I can't get it working in a Web User Control. I know about
> > UniqueID and ClientID but what I don't know is how get the ClientID from

> the

> > string being passed in so I can use it in the AddAttributesToRender Sub

> (or

> > should I be passing in a Control instead).
> >
> > Mucho head scratching.
> >
> > TIA,
> > Stuart.
> >
> >

>
>