Creating N rows of controls

19 Mar 2006 9:41 PM

David Thielen

Hi;

When creating a new report, I need to have a table with 0 â€“ N rows, one for
each variable in a report. I donâ€™t know how many of these there are until the
user uploads the report template file so I can't prebuild N rows in the aspx
file.

Once I do know, each row has a checkbox, a label, and a dropdownlist (each a
cell in the table). And when there is a post-back, each of these need to be
set to the values they previously had. How do I set this up and how do I
access the values?

--
thanks - dave
david_at_windward_dot_net
http://www.windwardreports.com

20 Mar 2006 2:42 AM

Ken Cox - Microsoft MVP

Hi Dave,

You need to create your controls programmatically, including all of the
controls they contain. Then add the controls to a placeholder.

Here's a quick example that should give you the idea.

Let us know if this helps?

Ken
Microsoft MVP [ASP.NET]

<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As
System.EventArgs)
        Dim gv As GridView
        Dim intCounter As Integer
        If Not IsPostBack Then
            For intCounter = 0 To 5
                gv = New GridView
                gv.ID = "gv" & intCounter.ToString
                gv.DataSource = CreateDataSource()
                gv.DataBind()
                PlaceHolder1.Controls.Add(gv)
            Next
        End If
    End Sub

    Function CreateDataSource() As Data.DataTable
        Dim dt As New Data.DataTable
        Dim dr As Data.DataRow
        dt.Columns.Add(New Data.DataColumn _
        ("StringValue", GetType(String)))
        dt.Columns.Add(New Data.DataColumn _
        ("StringValue2", GetType(String)))
        Dim i As Integer
        For i = 0 To 5
            dr = dt.NewRow()
            dr(0) = i.ToString & "@none.com"
            dr(1) = "Item " & i.ToString()
            dt.Rows.Add(dr)
        Next i
        Return dt

    End Function
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:placeholder id="PlaceHolder1" runat="server"></asp:placeholder>

    </div>
    </form>
</body>
</html>

Show quoteHide quote

"David Thielen" <thielen@nospam.nospam> wrote in message
news:AAB6BBD0-F854-4976-B080-8F8928E435BE@microsoft.com...
> Hi;
>
> When creating a new report, I need to have a table with 0 - N rows, one
> for
> each variable in a report. I don't know how many of these there are until
> the
> user uploads the report template file so I can't prebuild N rows in the
> aspx
> file.
>
> Once I do know, each row has a checkbox, a label, and a dropdownlist (each
> a
> cell in the table). And when there is a post-back, each of these need to
> be
> set to the values they previously had. How do I set this up and how do I
> access the values?
>
> --
> thanks - dave
> david_at_windward_dot_net
> http://www.windwardreports.com
>

20 Mar 2006 2:56 AM

David Thielen

Hi;

Ok, will try this. I was hoping that ASP had a construct like JSPs do where
you can put a for loop in the jsp (aspx) file so everything is right there
and no need to touch a code behind to add controls.

--
thanks - dave
david_at_windward_dot_net
http://www.windwardreports.com

Show quoteHide quote

"Ken Cox - Microsoft MVP" wrote:

> Hi Dave,
>
> You need to create your controls programmatically, including all of the
> controls they contain. Then add the controls to a placeholder.
>
> Here's a quick example that should give you the idea.
>
> Let us know if this helps?
>
> Ken
> Microsoft MVP [ASP.NET]
>
> <%@ Page Language="VB" %>
>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
>
> <script runat="server">
>
>     Protected Sub Page_Load(ByVal sender As Object, ByVal e As
> System.EventArgs)
>         Dim gv As GridView
>         Dim intCounter As Integer
>         If Not IsPostBack Then
>             For intCounter = 0 To 5
>                 gv = New GridView
>                 gv.ID = "gv" & intCounter.ToString
>                 gv.DataSource = CreateDataSource()
>                 gv.DataBind()
>                 PlaceHolder1.Controls.Add(gv)
>             Next
>         End If
>     End Sub
>
>     Function CreateDataSource() As Data.DataTable
>         Dim dt As New Data.DataTable
>         Dim dr As Data.DataRow
>         dt.Columns.Add(New Data.DataColumn _
>         ("StringValue", GetType(String)))
>         dt.Columns.Add(New Data.DataColumn _
>         ("StringValue2", GetType(String)))
>         Dim i As Integer
>         For i = 0 To 5
>             dr = dt.NewRow()
>             dr(0) = i.ToString & "@none.com"
>             dr(1) = "Item " & i.ToString()
>             dt.Rows.Add(dr)
>         Next i
>         Return dt
>
>     End Function
> </script>
>
> <html xmlns="http://www.w3.org/1999/xhtml" >
> <head runat="server">
>     <title>Untitled Page</title>
> </head>
> <body>
>     <form id="form1" runat="server">
>     <div>
>         <asp:placeholder id="PlaceHolder1" runat="server"></asp:placeholder>
>
>     </div>
>     </form>
> </body>
> </html>
>
>
> "David Thielen" <thielen@nospam.nospam> wrote in message
> news:AAB6BBD0-F854-4976-B080-8F8928E435BE@microsoft.com...
> > Hi;
> >
> > When creating a new report, I need to have a table with 0 - N rows, one
> > for
> > each variable in a report. I don't know how many of these there are until
> > the
> > user uploads the report template file so I can't prebuild N rows in the
> > aspx
> > file.
> >
> > Once I do know, each row has a checkbox, a label, and a dropdownlist (each
> > a
> > cell in the table). And when there is a post-back, each of these need to
> > be
> > set to the values they previously had. How do I set this up and how do I
> > access the values?
> >
> > --
> > thanks - dave
> > david_at_windward_dot_net
> > http://www.windwardreports.com
> >
>
>
>

20 Mar 2006 8:24 AM

Steven Cheng[MSFT]

Hi Dave,

I think you can also consider using the ASP.NET¡¯s template databound
control. For example, we can use the Repeater control and put those certain
controls we want to repeatedly create in the ItemTemplate of the repeater.
At runtime, we can dynamically bind a simple collection(List, Array or
IEnumarble....) to the repeater and perform databinding, this can help us
make a list of those controls in the Itemtemplate and the repeat count just
match the datasource's length.

Hope this also helps.

Regards,

Steven Cheng
Microsoft Online Support

Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)

20 Mar 2006 7:09 PM

David Thielen

This works very nicely - thank you

--
thanks - dave
david_at_windward_dot_net
http://www.windwardreports.com

Show quoteHide quote

"Steven Cheng[MSFT]" wrote:

>
> Hi Dave,
>
> I think you can also consider using the ASP.NETÂ¡Â¯s template databound
> control. For example, we can use the Repeater control and put those certain
> controls we want to repeatedly create in the ItemTemplate of the repeater.
> At runtime, we can dynamically bind a simple collection(List, Array or
> IEnumarble....) to the repeater and perform databinding, this can help us
> make a list of those controls in the Itemtemplate and the repeat count just
> match the datasource's length.
>
> Hope this also helps.
>
>
> Regards,
>
> Steven Cheng
> Microsoft Online Support
>
> Get Secure! www.microsoft.com/security
> (This posting is provided "AS IS", with no warranties, and confers no
> rights.)
>
>
>
>

21 Mar 2006 6:09 AM

Steven Cheng[MSFT]

You're welcome.

regards,

Steven Cheng
Microsoft Online Support

Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)