FindStringExtract() won't work if ComboBox populated by setting DataSource

[Ryan Liu]

I notice in the ComboBox, when set its DataSource, its .Items will be empty
collection. And .FindStringExtract() will not find anything. Seems this is
not documented.
Ryan

[Nicholas Paldino [.NET/C# MVP]]

Ryan,

FindStringExact (and FindString) will only work when you populate the
list through the Items property. It doesn't work for databinding.

However, you can create a general search algorithm that takes the list
source, as well as the display item, and evalulates each item in the list,
looking for the string.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"Ryan Liu" <ad********@online.sh.cn> wrote in message
news:u2**************@TK2MSFTNGP04.phx.gbl...

I notice in the ComboBox, when set its DataSource, its .Items will be empty
collection. And .FindStringExtract() will not find anything. Seems this is
not documented.
Ryan

[Ryan Liu]

Thanks, Nicholas !

Now I write so it will fist go though its DataSource(cast to IList), if not
found, then I try FindStringExact(). I was trying to write a generic code,
now I hope this is also safe enough.

Regards,
Ryan
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard.caspershouse.com> дÈëÓʼþ
news:%2****************@TK2MSFTNGP02.phx.gbl...

Ryan,

FindStringExact (and FindString) will only work when you populate the
list through the Items property. It doesn't work for databinding.

However, you can create a general search algorithm that takes the list
source, as well as the display item, and evalulates each item in the list,
looking for the string.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"Ryan Liu" <ad********@online.sh.cn> wrote in message
news:u2**************@TK2MSFTNGP04.phx.gbl...

I notice in the ComboBox, when set its DataSource, its .Items will be empty collection. And .FindStringExtract() will not find anything. Seems this is not documented.
Ryan

[Nicholas Paldino [.NET/C# MVP]]

Ryan,

Well, I would switch on whether or not there is a data source or not,
but yes, using the IList implementation, along with the DataMember and the
DisplayMember properties should be enough.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"Ryan Liu" <ad********@online.sh.cn> wrote in message
news:ep**************@TK2MSFTNGP04.phx.gbl...

Thanks, Nicholas !

Now I write so it will fist go though its DataSource(cast to IList), if
not
found, then I try FindStringExact(). I was trying to write a generic code,
now I hope this is also safe enough.

Regards,
Ryan
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard.caspershouse.com>
дÈëÓʼþ
news:%2****************@TK2MSFTNGP02.phx.gbl...

Ryan,

FindStringExact (and FindString) will only work when you populate the
list through the Items property. It doesn't work for databinding.

However, you can create a general search algorithm that takes the
list
source, as well as the display item, and evalulates each item in the
list,
looking for the string.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"Ryan Liu" <ad********@online.sh.cn> wrote in message
news:u2**************@TK2MSFTNGP04.phx.gbl...

>I notice in the ComboBox, when set its DataSource, its .Items will be empty > collection. And .FindStringExtract() will not find anything. Seems this is > not documented.
>
>
> Ryan
>
>