Data Presentation Controls

Re: hide fields and lables with empty data, in Formview or Details

riprod — Sat, 09 Feb 2008 20:30:45 GMT

Got it !

<asp:PlaceHolder ID="PlaceHolder2" runat="server" Visible='<%# IIf((Eval("address2")).ToString().Length > 0, "true", "false") %>'>
<tr>
<td>
address2:
<asp:Label ID="address2Label" runat="server" Text='<%# Bind("address2") %>'></asp:Label>
</td>
</tr>
</asp:PlaceHolder>

This works! Thanks for the help

Re: hide fields and lables with empty data, in Formview or Details

riprod — Sat, 09 Feb 2008 20:22:35 GMT

I can't tell because there is not data there to start with, that's why I'm trying to remove the row.

If I try it on a row with data like this :

<asp:PlaceHolder ID="PlaceHolder1" runat="server" Visible='<%# (Eval("address2")).ToString().Length > 0 ? true : false %>'><asp:Label ID="address1Label" runat="server" Text='<%# Bind("address1") %>'></asp:Label></asp:PlaceHolder>

It errors out with Character Not Valid / Syntax error

Re: hide fields and lables with empty data, in Formview or Details

ChibiNopo — Sat, 09 Feb 2008 20:05:36 GMT

Maybe like this? <asp:PlaceHolder ID="PlaceHolder1" runat="server" Visible='<%# (Eval("address2")).ToString().Length > 0 ? true : false%>'>

This will not hide the row/cell from a table but see if it gets rid of the data.

Re: hide fields and lables with empty data, in Formview or Details

riprod — Sat, 09 Feb 2008 19:53:27 GMT

Hi, SOrry. I tried this too :

<tr runat="server" visible='<%# Eval("Address2")!=null %>'>your label goes here</tr> but converted it to VB like so...

<td runat="server" visible='<%# Eval("address2") IsNot Nothing %>'>
address2:
<asp:Label ID="address2Label" runat="server" Text='<%# Bind("address2") %>'></asp:Label>
</td>

Makes no difference. The row still remains there with the lable and an empty field next to it.

Maybe I need to elaborate a bit. I'm using VB in Visual Studio 2005.
I've tried both "DetailsView" and "FormView"

Details View doesn't seam to allow me to do anything to the code.

Any other ideas ? I would think this is a very common thing but I'm totally new to ASP.NET and only really know classic ASP.

Thanks

Re: hide fields and lables with empty data, in Formview or Details

riprod — Sat, 09 Feb 2008 19:41:29 GMT

I tried this but if gives an error : Conversion from string "" to type 'Boolean' is not valid.

here's the code :

<asp:PlaceHolder ID="PlaceHolder1" runat="server" Visible='<%# (Eval("address2")) %>'>address2:
<asp:Label ID="address2Label" runat="server" Text='<%# Bind("address2") %>'></asp:Label><br /></asp:PlaceHolder>

any ideas ?

Re: hide fields and lables with empty data, in Formview or Details

ChibiNopo — Sat, 09 Feb 2008 19:24:42 GMT

Use a PlaceHolder around your control and set the PlaceHolder's visibility based on the content of the control it holds. If the control's data is Null the PlaceHolder will be hidden and won't even take up space.

<asp:PlaceHolder ID="PlaceHolder1" runat="server" Visible='<%# (Eval("YourItem")) %>'><asp:Label ID="YourItem" runat="server" Text="YourItem" Visible='<%# (Eval("YourItem")) %>' ></asp:Label></asp:PlaceHolder>

You might need a <br /> just before the closing tag to make sure that the data above and below don't end up next to each other. If you put it outside, it will always be there and you could potentially end up with 2 or 3 breaks between items if there were a few Null items being hidden.

Re: hide fields and lables with empty data, in Formview or Details

s10n — Sat, 09 Feb 2008 19:18:28 GMT

if you are using a table do it like htis:

<tr runat="server" visible='<%# Eval("Name")!=null %>'>your label goes here</tr>

if you are not using a table consider using one so you dont have problems with the line return that is left after you remove the label.

hide fields and lables with empty data, in Formview or Details

riprod — Sat, 09 Feb 2008 18:25:10 GMT

I have something like this :

Name
address1
address2
City
State
Zip

If address2 is empty, I want it to hide that whole row. Even if I remove the lables, it leaves a line return there.

I'm using Formview but can also use details in Visual Studio 2005

Thanks