ComboBox, ListBox DataSource = null not work

[kids_pro]

Hi,

On form_load() I bind a combobox to a dataset and listbox to a datatable.

When I want to unbind it I call comboBox1.DataSource = null,
listBox1.DataSource = null
It unbind but the Items still persist in the comboBox and listBox. I expect
it to be empty list.

Can anyone tell me how to unbind the comboBox and automatically clear it
items?

Regards,
kids

[¼ªÈÕ¸ÂÀ­]

try it

comboBox1.DataSource = null;
comboBox.items.clear();

"kids_pro" <ki******@yahoo.com> дÈëÏûÏ¢
news:O3*************@TK2MSFTNGP12.phx.gbl...

Hi,

On form_load() I bind a combobox to a dataset and listbox to a datatable.

When I want to unbind it I call comboBox1.DataSource = null,
listBox1.DataSource = null
It unbind but the Items still persist in the comboBox and listBox. I expect it to be empty list.

Can anyone tell me how to unbind the comboBox and automatically clear it
items?

Regards,
kids

[kids_pro]

I already try but it still there.

"¼ªÈÕ¸ÂÀ*" <ji******@163.net> wrote in message
news:ux****************@TK2MSFTNGP15.phx.gbl...

try it

comboBox1.DataSource = null;
comboBox.items.clear();

"kids_pro" <ki******@yahoo.com> дÈëÏûÏ¢
news:O3*************@TK2MSFTNGP12.phx.gbl...

Hi,

On form_load() I bind a combobox to a dataset and listbox to a datatable.
When I want to unbind it I call comboBox1.DataSource = null,
listBox1.DataSource = null
It unbind but the Items still persist in the comboBox and listBox. I

expect

it to be empty list.

Can anyone tell me how to unbind the comboBox and automatically clear it
items?

Regards,
kids

[Marcin Grzêbski]

Hi,

I have no experiences with DataBinding but i can recommend
to try:

comboBox1.DataSource = null;
comboBox1.DataBindings.Clear();

Regards

Marcin

I already try but it still there.

"¼ªÈÕ¸ÂÀ*" <ji******@163.net> wrote in message
news:ux****************@TK2MSFTNGP15.phx.gbl...

try it

comboBox1.DataSource = null;
comboBox.items.clear();

"kids_pro" <ki******@yahoo.com> дÈëÏûÏ¢
news:O3*************@TK2MSFTNGP12.phx.gbl...

Hi,

On form_load() I bind a combobox to a dataset and listbox to a
datatable.
When I want to unbind it I call comboBox1.DataSource = null,
listBox1.DataSource = null
It unbind but the Items still persist in the comboBox and listBox. I

expect

it to be empty list.

Can anyone tell me how to unbind the comboBox and automatically clear it
items?

Regards,
kids

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

Cause they are still in the control, the binding in web do not work the
same as in windows, what you can do is this:

Set the datasource= null
Call listbox.DataBind()
this should delete all
opposite what you can do if the above does not work ( very unlikely ) is
bind it to an empty collection/array, etc

cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"kids_pro" <ki******@yahoo.com> wrote in message
news:O3*************@TK2MSFTNGP12.phx.gbl...

Hi,

On form_load() I bind a combobox to a dataset and listbox to a datatable.

When I want to unbind it I call comboBox1.DataSource = null,
listBox1.DataSource = null
It unbind but the Items still persist in the comboBox and listBox. I expect it to be empty list.

Can anyone tell me how to unbind the comboBox and automatically clear it
items?

Regards,
kids