Programmaticall y Adding An Item To The DataList

[Umut K.]

Hi all,
I've a DataList control and it's DataBound by a SqlDataReader.. .
The Reader returns say 3 records and as expected the datalist shows 3 rows.
What i want to do is to add another extra Record (which is not neccesarily a
database record..) but it'll be shown up as an ordinary item in the datalist
rendered as an Item or AlternatingItem ...
Is there a way to do this?

Thanks

[Bench Wang]

Try to fill DataList with a loop and then add the extra record.
Or override PreRender event of DataList and add the extra record.
Hope this helps.

[Umut K.]

Thank you,
That's what i'm avoiding to do... (but seems like the only way i have .. )
Why isn't it allowed myDataList.Item s.Add(new DataListItem(). ..... ) or
smtg. like this..
??
Any other ideas?

"Bench Wang" <be*******@sohu .com> wrote in message
news:Oy******** ******@tk2msftn gp13.phx.gbl...

Try to fill DataList with a loop and then add the extra record.
Or override PreRender event of DataList and add the extra record.
Hope this helps.

[Jay B. Harlow [MVP - Outlook]]

Umut,
For a System.Web.UI.W ebControls.Drop DownList, I use something similar to:

Dim Data As DataSet
Dim lst As DropDownList
lst.DataMember = "MyMember"
lst.DataTextFie ld = "FieldName"
lst.DataSrouce = Data

DataBind()

lst.Items.Inser t(0, New ListItem("<sele ct item>", ""))

I use the above in the Page Load event, which adds the <select item> to the
top of the drop down list. Notice that I call DataBind before I add the
extra item.

I would expect a DataList to work the same way.

Hope this helps
Jay

"Umut K." <uk*****@yahoo. com> wrote in message
news:ud******** *******@TK2MSFT NGP09.phx.gbl.. .

Hi all,
I've a DataList control and it's DataBound by a SqlDataReader.. .
The Reader returns say 3 records and as expected the datalist shows 3 rows. What i want to do is to add another extra Record (which is not neccesarily a database record..) but it'll be shown up as an ordinary item in the datalist rendered as an Item or AlternatingItem ...
Is there a way to do this?

Thanks

[Umut K.]

Yes, while this works great for the DropDownList,
System.Web.UI.W ebControls.Data List doesn't allow sucha method like Insert...
I mean ther's no method like Insert or Add (or am i missing something?)

"Jay B. Harlow [MVP - Outlook]" <Ja********@ema il.msn.com> wrote in message
news:%2******** *******@TK2MSFT NGP11.phx.gbl.. .

Umut,
For a System.Web.UI.W ebControls.Drop DownList, I use something similar to:

Dim Data As DataSet
Dim lst As DropDownList
lst.DataMember = "MyMember"
lst.DataTextFie ld = "FieldName"
lst.DataSrouce = Data

DataBind()

lst.Items.Inser t(0, New ListItem("<sele ct item>", ""))

I use the above in the Page Load event, which adds the <select item> to the top of the drop down list. Notice that I call DataBind before I add the
extra item.

I would expect a DataList to work the same way.

Hope this helps
Jay

"Umut K." <uk*****@yahoo. com> wrote in message
news:ud******** *******@TK2MSFT NGP09.phx.gbl.. .

Hi all,
I've a DataList control and it's DataBound by a SqlDataReader.. .
The Reader returns say 3 records and as expected the datalist shows 3 rows.

What i want to do is to add another extra Record (which is not

neccesarily a

database record..) but it'll be shown up as an ordinary item in the

datalist

rendered as an Item or AlternatingItem ...
Is there a way to do this?

Thanks

[Jay B. Harlow [MVP - Outlook]]

Umut,
Doh! I don't see an Add or Insert on the DataListItemCol lection either.

Curious that they are different, must be some reason. (shrug)

Two options I would consider instead then.

1. Use the SqlDataReader to populate a DataTable, add your row to the
DataTable, then bind to the DataTable.
2. Create a 'Proxy' Data reader that returns the values out of a contained
SqlDataReader, plus the extra row. This class would implement the
IDataReader, IDataRecord, IDisposable, and IEnumerable interfaces.
Delegating most calls to the contained SqlDataReader, however it would
return one or two records first or last... Similar to how the
System.IO.Strea m classes work, where you can chain one stream to second
stream chained to a third stream...

I haven't done a lot with DataLists, maybe there is an easier way.

Hope this helps
Jay

"Umut K." <uk*****@yahoo. com> wrote in message
news:%2******** *******@TK2MSFT NGP09.phx.gbl.. .

Yes, while this works great for the DropDownList,
System.Web.UI.W ebControls.Data List doesn't allow sucha method like Insert... I mean ther's no method like Insert or Add (or am i missing something?)

"Jay B. Harlow [MVP - Outlook]" <Ja********@ema il.msn.com> wrote in message news:%2******** *******@TK2MSFT NGP11.phx.gbl.. .

Umut,
For a System.Web.UI.W ebControls.Drop DownList, I use something similar to:
Dim Data As DataSet
Dim lst As DropDownList
lst.DataMember = "MyMember"
lst.DataTextFie ld = "FieldName"
lst.DataSrouce = Data

DataBind()

lst.Items.Inser t(0, New ListItem("<sele ct item>", ""))

I use the above in the Page Load event, which adds the <select item> to

the

top of the drop down list. Notice that I call DataBind before I add the
extra item.

I would expect a DataList to work the same way.

Hope this helps
Jay

"Umut K." <uk*****@yahoo. com> wrote in message
news:ud******** *******@TK2MSFT NGP09.phx.gbl.. .

Hi all,
I've a DataList control and it's DataBound by a SqlDataReader.. .
The Reader returns say 3 records and as expected the datalist shows 3

rows.

What i want to do is to add another extra Record (which is not

neccesarily

a

database record..) but it'll be shown up as an ordinary item in the

datalist

rendered as an Item or AlternatingItem ...
Is there a way to do this?

Thanks

[Umut K.]

Jay, thanks. i'm going to try your suggestions..
"Jay B. Harlow [MVP - Outlook]" <Ja********@ema il.msn.com> wrote in message
news:uE******** ******@TK2MSFTN GP10.phx.gbl...

Umut,
Doh! I don't see an Add or Insert on the DataListItemCol lection either.

Curious that they are different, must be some reason. (shrug)

Two options I would consider instead then.

1. Use the SqlDataReader to populate a DataTable, add your row to the
DataTable, then bind to the DataTable.
2. Create a 'Proxy' Data reader that returns the values out of a contained
SqlDataReader, plus the extra row. This class would implement the
IDataReader, IDataRecord, IDisposable, and IEnumerable interfaces.
Delegating most calls to the contained SqlDataReader, however it would
return one or two records first or last... Similar to how the
System.IO.Strea m classes work, where you can chain one stream to second
stream chained to a third stream...

I haven't done a lot with DataLists, maybe there is an easier way.

Hope this helps
Jay

"Umut K." <uk*****@yahoo. com> wrote in message
news:%2******** *******@TK2MSFT NGP09.phx.gbl.. .

Yes, while this works great for the DropDownList,
System.Web.UI.W ebControls.Data List doesn't allow sucha method like

Insert...

I mean ther's no method like Insert or Add (or am i missing something?)

"Jay B. Harlow [MVP - Outlook]" <Ja********@ema il.msn.com> wrote in

message

news:%2******** *******@TK2MSFT NGP11.phx.gbl.. .

Umut,
For a System.Web.UI.W ebControls.Drop DownList, I use something similar to:
Dim Data As DataSet
Dim lst As DropDownList
lst.DataMember = "MyMember"
lst.DataTextFie ld = "FieldName"
lst.DataSrouce = Data

DataBind()

lst.Items.Inser t(0, New ListItem("<sele ct item>", ""))

I use the above in the Page Load event, which adds the <select item> to

the

top of the drop down list. Notice that I call DataBind before I add

the extra item.

I would expect a DataList to work the same way.

Hope this helps
Jay

"Umut K." <uk*****@yahoo. com> wrote in message
news:ud******** *******@TK2MSFT NGP09.phx.gbl.. .
> Hi all,
> I've a DataList control and it's DataBound by a SqlDataReader.. .
> The Reader returns say 3 records and as expected the datalist shows 3 rows.
> What i want to do is to add another extra Record (which is not

neccesarily

a
> database record..) but it'll be shown up as an ordinary item in the
datalist
> rendered as an Item or AlternatingItem ...
> Is there a way to do this?
>
> Thanks
>
>