why does this code return an empty Alert window?

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  • Phil
    #1

    why does this code return an empty Alert window?

    Hi,

    This code produces an empty Alert window. No error.
    How to get the value into the Alert window?

    Thanks
    Phil

    aspx file (content page):
    ------------------------
    <asp:Content ID="Content1" ContentPlaceHol derID="ContentP laceHolder1"
    Runat="Server">
    asp:Label ID="Label1" runat="server"> </asp:Label>

    <asp:Button ID="Button1" runat="server" OnClientClick=" test()" />
    <script language="javas cript" type="text/javascript">
    function test()
    {
    var x = document.getEle mentById('<%=la bel1.ClientID%> ').innerText;
    alert(x)
    }
    </script>
    </asp:Content>


    code-behind:
    -----------
    Protected Sub Button1_Click(B yVal sender As Object, ByVal e As
    System.EventArg s) Handles Button1.Click
    Label1.Text = "Alle velden moeten ingevuld zijn"
    End sub


    Tags: None
    • David Wier
      #2
      Re: why does this code return an empty Alert window?

      The label has no text. I tried it - copied and pasted, exactly, except for
      adding a "<" bracket in froont of the label, and adding a text property to
      it. It worked just fine for me, then.

      --
      David Wier
      MVP/ASPInsider
      http://aspnet101.com

      http://aspexpress.com



      "Phil" <ssdfvtgsd@fff. dfwrote in message
      news:u2ikgHcYHH A.588@TK2MSFTNG P06.phx.gbl...
      Hi,
      >
      This code produces an empty Alert window. No error.
      How to get the value into the Alert window?
      >
      Thanks
      Phil
      >
      aspx file (content page):
      ------------------------
      <asp:Content ID="Content1" ContentPlaceHol derID="ContentP laceHolder1"
      Runat="Server">
      asp:Label ID="Label1" runat="server"> </asp:Label>
      >
      <asp:Button ID="Button1" runat="server" OnClientClick=" test()" />
      <script language="javas cript" type="text/javascript">
      function test()
      {
      var x = document.getEle mentById('<%=la bel1.ClientID%> ').innerText;
      alert(x)
      }
      </script>
      </asp:Content>
      >
      >
      code-behind:
      -----------
      Protected Sub Button1_Click(B yVal sender As Object, ByVal e As
      System.EventArg s) Handles Button1.Click
      Label1.Text = "Alle velden moeten ingevuld zijn"
      End sub
      >
      >

        Comment

        • Jan
          #3
          Re: why does this code return an empty Alert window?

          Hi David. Thanks for repying, but i really don't understand what you mean.
          Can you tell me what i have to change in my code?
          Thanks


          "David Wier" <david_wier@noS pamhotmail.coms chreef in bericht
          news:%23VoH2NcY HHA.588@TK2MSFT NGP06.phx.gbl.. .
          The label has no text. I tried it - copied and pasted, exactly, except for
          adding a "<" bracket in froont of the label, and adding a text property to
          it. It worked just fine for me, then.
          >
          --
          David Wier
          MVP/ASPInsider
          http://aspnet101.com

          http://aspexpress.com

          >
          >
          "Phil" <ssdfvtgsd@fff. dfwrote in message
          news:u2ikgHcYHH A.588@TK2MSFTNG P06.phx.gbl...
          >Hi,
          >>
          >This code produces an empty Alert window. No error.
          >How to get the value into the Alert window?
          >>
          >Thanks
          >Phil
          >>
          >aspx file (content page):
          >------------------------
          ><asp:Content ID="Content1" ContentPlaceHol derID="ContentP laceHolder1"
          >Runat="Server" >
          > asp:Label ID="Label1" runat="server"> </asp:Label>
          >>
          ><asp:Button ID="Button1" runat="server" OnClientClick=" test()" />
          > <script language="javas cript" type="text/javascript">
          > function test()
          > {
          > var x = document.getEle mentById('<%=la bel1.ClientID%> ').innerText;
          > alert(x)
          > }
          ></script>
          ></asp:Content>
          >>
          >>
          >code-behind:
          >-----------
          >Protected Sub Button1_Click(B yVal sender As Object, ByVal e As
          >System.EventAr gs) Handles Button1.Click
          >Label1.Text = "Alle velden moeten ingevuld zijn"
          >End sub
          >>
          >>
          >
          >

            Comment

            • David Wier
              #4
              Re: why does this code return an empty Alert window?

              <asp:Label ID="Label1" Text="My Text is Here" runat="server"> </asp:Label>

              --
              David Wier
              MVP/ASPInsider
              http://aspnet101.com

              http://aspexpress.com



              "Jan" <uuvtgsd@fff.ty wrote in message
              news:u7uW4WcYHH A.408@TK2MSFTNG P04.phx.gbl...
              Hi David. Thanks for repying, but i really don't understand what you mean.
              Can you tell me what i have to change in my code?
              Thanks
              >
              >
              "David Wier" <david_wier@noS pamhotmail.coms chreef in bericht
              news:%23VoH2NcY HHA.588@TK2MSFT NGP06.phx.gbl.. .
              The label has no text. I tried it - copied and pasted, exactly, except
              for
              adding a "<" bracket in froont of the label, and adding a text property
              to
              it. It worked just fine for me, then.

              --
              David Wier
              MVP/ASPInsider
              http://aspnet101.com

              http://aspexpress.com



              "Phil" <ssdfvtgsd@fff. dfwrote in message
              news:u2ikgHcYHH A.588@TK2MSFTNG P06.phx.gbl...
              Hi,
              >
              This code produces an empty Alert window. No error.
              How to get the value into the Alert window?
              >
              Thanks
              Phil
              >
              aspx file (content page):
              ------------------------
              <asp:Content ID="Content1" ContentPlaceHol derID="ContentP laceHolder1"
              Runat="Server">
              asp:Label ID="Label1" runat="server"> </asp:Label>
              >
              <asp:Button ID="Button1" runat="server" OnClientClick=" test()" />
              <script language="javas cript" type="text/javascript">
              function test()
              {
              var x = document.getEle mentById('<%=la bel1.ClientID%> ').innerText;
              alert(x)
              }
              </script>
              </asp:Content>
              >
              >
              code-behind:
              -----------
              Protected Sub Button1_Click(B yVal sender As Object, ByVal e As
              System.EventArg s) Handles Button1.Click
              Label1.Text = "Alle velden moeten ingevuld zijn"
              End sub
              >
              >
              >
              >

                Comment

                • Mark Rae
                  #5
                  Re: why does this code return an empty Alert window?

                  "Jan" <uuvtgsd@fff.ty wrote in message
                  news:u7uW4WcYHH A.408@TK2MSFTNG P04.phx.gbl...
                  Can you tell me what i have to change in my code?
                  <asp:Label ID="Label1" runat="server" Text="Hello world!" />


                    Comment

                    • Phil
                      #6
                      Re: why does this code return an empty Alert window?

                      Ok, thanks, but could you tell me why it doesn't work programmaticall y like
                      this:

                      Protected Sub Button1_Click(B yVal sender As Object, ByVal e As
                      System.EventArg s) Handles Button1.Click Label1.Text = "Hello World"
                      End sub

                      "Mark Rae" <mark@markNOSPA Mrae.comschreef in bericht
                      news:OWwB54cYHH A.3656@TK2MSFTN GP05.phx.gbl...
                      "Jan" <uuvtgsd@fff.ty wrote in message
                      news:u7uW4WcYHH A.408@TK2MSFTNG P04.phx.gbl...
                      >
                      >Can you tell me what i have to change in my code?
                      >
                      <asp:Label ID="Label1" runat="server" Text="Hello world!" />
                      >

                        Comment

                        • Phil
                          #7
                          Re: why does this code return an empty Alert window?

                          It's because the ClientClick will be executed first, and at that moment, the
                          value is not yet put into 'text' of the label

                          "Phil" <uuvtgsd@fff.ty schreef in bericht
                          news:%23tQK19cY HHA.4008@TK2MSF TNGP05.phx.gbl. ..
                          Ok, thanks, but could you tell me why it doesn't work programmaticall y
                          like this:
                          >
                          Protected Sub Button1_Click(B yVal sender As Object, ByVal e As
                          System.EventArg s) Handles Button1.Click Label1.Text = "Hello World"
                          End sub
                          >
                          "Mark Rae" <mark@markNOSPA Mrae.comschreef in bericht
                          news:OWwB54cYHH A.3656@TK2MSFTN GP05.phx.gbl...
                          >"Jan" <uuvtgsd@fff.ty wrote in message
                          >news:u7uW4WcYH HA.408@TK2MSFTN GP04.phx.gbl...
                          >>
                          >>Can you tell me what i have to change in my code?
                          >>
                          ><asp:Label ID="Label1" runat="server" Text="Hello world!" />
                          >>
                          >
                          >

                            Comment

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