Problem with CustomValidator

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  • Nathan Sokalski
    #1

    Problem with CustomValidator

    I want to make sure that the SelectedDate property of the Calendar control
    is later than the current date or that a certain checkbox is selected. I
    tried to use a CustomValidator control with the following code:

    Private Sub validTimeFrame_ ServerValidate( ByVal source As System.Object,
    ByVal args As System.Web.UI.W ebControls.Serv erValidateEvent Args) Handles
    validTimeFrame. ServerValidate

    If chkUnknown.Chec ked OrElse calTimeFrame.Se lectedDate >= Date.Today Then

    args.IsValid = True

    Else

    args.IsValid = False

    End If

    End Sub


    As you can see, I check to see if chkUnknown is checked or if
    calTimeFrame.Se lectedDate>= Date.Today. If either one is true, then I assign
    True to the IsValid property, otherwise I assign it a value of false.
    However, when I test the page it brings up the following error:

    [HttpException (0x80004005): Control 'calTimeFrame' referenced by the
    ControlToValida te property of 'validTimeFrame ' cannot be validated.]
    System.Web.UI.W ebControls.Base Validator.Check ControlValidati onProperty(Stri ng
    name, String propertyName)
    System.Web.UI.W ebControls.Cust omValidator.Con trolPropertiesV alid()
    System.Web.UI.W ebControls.Base Validator.get_P ropertiesValid( )
    System.Web.UI.W ebControls.Base Validator.Rende r(HtmlTextWrite r writer)
    System.Web.UI.C ontrol.RenderCo ntrol(HtmlTextW riter writer)
    System.Web.UI.C ontrol.RenderCh ildren(HtmlText Writer writer)
    System.Web.UI.C ontrol.Render(H tmlTextWriter writer)
    System.Web.UI.W ebControls.WebC ontrol.RenderCo ntents(HtmlText Writer
    writer)
    System.Web.UI.W ebControls.Tabl eCell.RenderCon tents(HtmlTextW riter writer)
    System.Web.UI.W ebControls.WebC ontrol.Render(H tmlTextWriter writer)
    System.Web.UI.C ontrol.RenderCo ntrol(HtmlTextW riter writer)
    System.Web.UI.C ontrol.RenderCh ildren(HtmlText Writer writer)
    System.Web.UI.C ontrol.Render(H tmlTextWriter writer)
    System.Web.UI.W ebControls.WebC ontrol.RenderCo ntents(HtmlText Writer
    writer)
    System.Web.UI.W ebControls.WebC ontrol.Render(H tmlTextWriter writer)
    System.Web.UI.C ontrol.RenderCo ntrol(HtmlTextW riter writer)
    System.Web.UI.W ebControls.Tabl e.RenderContent s(HtmlTextWrite r writer)
    System.Web.UI.W ebControls.WebC ontrol.Render(H tmlTextWriter writer)
    System.Web.UI.C ontrol.RenderCo ntrol(HtmlTextW riter writer)
    System.Web.UI.C ontrol.RenderCh ildren(HtmlText Writer writer)
    System.Web.UI.H tmlControls.Htm lForm.RenderChi ldren(HtmlTextW riter writer)
    System.Web.UI.H tmlControls.Htm lContainerContr ol.Render(HtmlT extWriter
    writer)
    System.Web.UI.H tmlControls.Htm lForm.Render(Ht mlTextWriter output)
    System.Web.UI.C ontrol.RenderCo ntrol(HtmlTextW riter writer)
    System.Web.UI.C ontrol.RenderCh ildren(HtmlText Writer writer)
    System.Web.UI.C ontrol.Render(H tmlTextWriter writer)
    System.Web.UI.C ontrol.RenderCo ntrol(HtmlTextW riter writer)
    System.Web.UI.P age.ProcessRequ estMain()

    Because this tells me nothing more than that the control cannot be
    validated, I do not know where to start. Any ideas? Thanks.
    --
    Nathan Sokalski
    njsokalski@hotm ail.com
    有声小说网-无弹窗小说阅读网
    http://www.nathansokalski.com/
    有声小说网为广大读者提供热门小说在线免费阅读，本站收集的网络文学小说情节跌宕起伏，有声小说网是值得书友们收藏的小说在线阅读网。



    Tags: None
    • Brock Allen
      #2
      Re: Problem with CustomValidator

      With a CustomValidator you don't need to assign the ControlToValida te property.

      -Brock
      DevelopMentor
      http://staff.develop.com/ballen



      [color=blue]
      > I want to make sure that the SelectedDate property of the Calendar
      > control is later than the current date or that a certain checkbox is
      > selected. I tried to use a CustomValidator control with the following
      > code:
      >
      > Private Sub validTimeFrame_ ServerValidate( ByVal source As
      > System.Object, ByVal args As
      > System.Web.UI.W ebControls.Serv erValidateEvent Args) Handles
      > validTimeFrame. ServerValidate
      >
      > If chkUnknown.Chec ked OrElse calTimeFrame.Se lectedDate >= Date.Today
      > Then
      >
      > args.IsValid = True
      >
      > Else
      >
      > args.IsValid = False
      >
      > End If
      >
      > End Sub
      >
      > As you can see, I check to see if chkUnknown is checked or if
      > calTimeFrame.Se lectedDate>= Date.Today. If either one is true, then I
      > assign True to the IsValid property, otherwise I assign it a value of
      > false. However, when I test the page it brings up the following error:
      >
      > [HttpException (0x80004005): Control 'calTimeFrame' referenced by the
      > ControlToValida te property of 'validTimeFrame ' cannot be validated.]
      >
      > System.Web.UI.W ebControls.Base Validator.Check ControlValidati onProperty
      > (String
      > name, String propertyName)
      > System.Web.UI.W ebControls.Cust omValidator.Con trolPropertiesV alid()
      > System.Web.UI.W ebControls.Base Validator.get_P ropertiesValid( )
      > System.Web.UI.W ebControls.Base Validator.Rende r(HtmlTextWrite r
      > writer)
      > System.Web.UI.C ontrol.RenderCo ntrol(HtmlTextW riter writer)
      > System.Web.UI.C ontrol.RenderCh ildren(HtmlText Writer writer)
      > System.Web.UI.C ontrol.Render(H tmlTextWriter writer)
      > System.Web.UI.W ebControls.WebC ontrol.RenderCo ntents(HtmlText Writer
      > writer)
      > System.Web.UI.W ebControls.Tabl eCell.RenderCon tents(HtmlTextW riter
      > writer)
      > System.Web.UI.W ebControls.WebC ontrol.Render(H tmlTextWriter writer)
      > System.Web.UI.C ontrol.RenderCo ntrol(HtmlTextW riter writer)
      > System.Web.UI.C ontrol.RenderCh ildren(HtmlText Writer writer)
      > System.Web.UI.C ontrol.Render(H tmlTextWriter writer)
      > System.Web.UI.W ebControls.WebC ontrol.RenderCo ntents(HtmlText Writer
      > writer)
      > System.Web.UI.W ebControls.WebC ontrol.Render(H tmlTextWriter writer)
      > System.Web.UI.C ontrol.RenderCo ntrol(HtmlTextW riter writer)
      > System.Web.UI.W ebControls.Tabl e.RenderContent s(HtmlTextWrite r
      > writer)
      > System.Web.UI.W ebControls.WebC ontrol.Render(H tmlTextWriter writer)
      > System.Web.UI.C ontrol.RenderCo ntrol(HtmlTextW riter writer)
      > System.Web.UI.C ontrol.RenderCh ildren(HtmlText Writer writer)
      > System.Web.UI.H tmlControls.Htm lForm.RenderChi ldren(HtmlTextW riter
      > writer)
      >
      > System.Web.UI.H tmlControls.Htm lContainerContr ol.Render(HtmlT extWriter
      > writer)
      > System.Web.UI.H tmlControls.Htm lForm.Render(Ht mlTextWriter output)
      > System.Web.UI.C ontrol.RenderCo ntrol(HtmlTextW riter writer)
      > System.Web.UI.C ontrol.RenderCh ildren(HtmlText Writer writer)
      > System.Web.UI.C ontrol.Render(H tmlTextWriter writer)
      > System.Web.UI.C ontrol.RenderCo ntrol(HtmlTextW riter writer)
      > System.Web.UI.P age.ProcessRequ estMain()
      > Because this tells me nothing more than that the control cannot be
      > validated, I do not know where to start. Any ideas? Thanks.
      >[/color]



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