Call Function from aspx
in [ASP .NET]
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From: Miro on 18 Apr 2010 01:20 I am really having trouble with this. I am trying to call a function from my .vb file within my .aspx file. My current results is that nothing happens. Wondering if someone can help me out. <form id="form1" runat="server"> <div> <br /> <asp:Label ID="Label1" runat="server" Text="<%= helloworld() %>"></asp:Label> <br /> </div> </form> and from my .vb file: Partial Class _Default Inherits System.Web.UI.Page Function helloworld() As String Return "From.vb" End Function End Class How do I get the label1 to get the text from the helloworld function on load? I know I can use "on_load event", but I want to try to call a function like this just like as if it was databound. Thanks,
From: Alexey Smirnov on 18 Apr 2010 05:40 On Apr 18, 7:20 am, "Miro" <m...(a)beero.com> wrote: > I am really having trouble with this. I am trying to call a function from > my .vb file within my .aspx file. > My current results is that nothing happens. > Wondering if someone can help me out. > > <form id="form1" runat="server"> > <div> > <br /> > <asp:Label ID="Label1" runat="server" Text="<%= helloworld() > %>"></asp:Label> > <br /> > </div> > </form> > > and from my .vb file: > > Partial Class _Default > Inherits System.Web.UI.Page > > Function helloworld() As String > Return "From.vb" > End Function > End Class > > How do I get the label1 to get the text from the helloworld function on > load? > > I know I can use "on_load event", but I want to try to call a function like > this just like as if it was databound. > > Thanks, The function must be marked as protected or public in order to be accessible from the aspx page. Protected Function helloworld() As String Read more about Access Specifiers http://msdn.microsoft.com/en-us/library/ms973875.aspx Hope this helps
From: Mark Rae [MVP] on 18 Apr 2010 06:53 "Miro" <miro(a)beero.com> wrote in message news:O#bdZbr3KHA.4332(a)TK2MSFTNGP02.phx.gbl... > I know I can use "on_load event", but I want to try to call a function > like this just like as if it was databound. Firstly, I think you're making things harder than they need to be... However, consider this: Label1 <asp:Label ID="Label1" runat="server"><%= helloworld()%></asp:Label><br /> Label2 <asp:Label ID="Label2" runat="server" Text="<%# helloworld()%>" /><br /> Label3 <asp:Label ID="Label3" runat="server" Text="<%= helloworld()%>" /> Label1 will always work. Label2 uses databinding syntax, so will work only if you call DataBind() in before the HTML has been streamed to the client, e.g. in Page_Load Label3, as it stands, will never work. -- Mark Rae ASP.NET MVP http://www.markrae.net
From: Gregory A. Beamer on 18 Apr 2010 11:14 "Miro" <miro(a)beero.com> wrote in message news:O#bdZbr3KHA.4332(a)TK2MSFTNGP02.phx.gbl... > I am really having trouble with this. I am trying to call a function from > my .vb file within my .aspx file. > My current results is that nothing happens. > Wondering if someone can help me out. > > <form id="form1" runat="server"> > <div> > <br /> > <asp:Label ID="Label1" runat="server" Text="<%= helloworld() > %>"></asp:Label> > <br /> > </div> > </form> > > and from my .vb file: > > > Partial Class _Default > Inherits System.Web.UI.Page > > Function helloworld() As String > Return "From.vb" > End Function > End Class > > How do I get the label1 to get the text from the helloworld function on > load? > > I know I can use "on_load event", but I want to try to call a function > like this just like as if it was databound. There are two ways to bind in .NET. One is declarative, in the tags, as you are attempting. Note that this can tightly couple your logic very easy. Follow Alexy's post to help. Mark has also suggested a simpler syntax, although I don't believe it gets around the issue Alexey mentioned. The second is to bind in events to controls. It is a much nicer syntax, esp. with ASP.NET controls. I know you don't want to go this direction, for some reason, but it is really a better way to handle the issue in almost every instance. -- Peace and Grace, Greg Twitter: @gbworld Blog: http://gregorybeamer.spaces.live.com ************************************************ | Think outside the box! | ************************************************
From: Mark Rae [MVP] on 18 Apr 2010 13:22 "Gregory A. Beamer" <NoSpamMgbworld(a)comcast.netNoSpamM> wrote in message news:E38E199E-FA4A-464C-A3B1-7BA9E18D322C(a)microsoft.com... > Mark has also suggested a simpler syntax, although I don't believe it gets > around the issue Alexey mentioned. It doesn't, but that's the artificial restriction that the OP has imposed... > The second is to bind in events to controls. It is a much nicer syntax, > esp. with ASP.NET controls. I know you don't want to go this direction, > for some reason, but it is really a better way to handle the issue in > almost every instance. Indeed. As I mentioned, the OP is making things unnecessarily difficult and complicated... -- Mark Rae ASP.NET MVP http://www.markrae.net
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