ComboBox problem?

[Kirsten]

I’m using VS 2008
I have a bound ComboBox on a form.
It is bound to a tblInvoiceHeader. VendorID, and it shows the VendorName. When clicked it displays a list of Vendors. When one is selected it is suppose to put the VendorID into this field.

When the form opens it displays the correct vendor (the one whose VendorID = the VendorID in this textbox), but when I change the selection it remains stuck in this ComboBox, I can’t do anything else on the form, nothing responds other than the combobox but no matter what I do in the combobox I can’t exist it.

The Combo is setup as such:
Data Source – a binding source that is connected to the VendorDS
Display Member - VendorName
Value Member – VendorID
All these are from the VendorDS.tblVendor
Selected Value – InvoiceHeaderBindingSource.VendorID ( I have tried changing this the dataset.table but it makes no difference to this behavior)

[kenobewan]

I’m using VS 2008
I have a bound ComboBox on a form.
It is bound to a tblInvoiceHeader. VendorID, and it shows the VendorName. When clicked it displays a list of Vendors. When one is selected it is suppose to put the VendorID into this field.

When the form opens it displays the correct vendor (the one whose VendorID = the VendorID in this textbox), but when I change the selection it remains stuck in this ComboBox, I can’t do anything else on the form, nothing responds other than the combobox but no matter what I do in the combobox I can’t exist it.

The Combo is setup as such:
Data Source – a binding source that is connected to the VendorDS
Display Member - VendorName
Value Member – VendorID
All these are from the VendorDS.tblVendor
Selected Value – InvoiceHeaderBindingSource.VendorID ( I have tried changing this the dataset.table but it makes no difference to this behavior)

What event(s) are you using with the combobox? Better to display the error.

[Kirsten]

I am not using any events with it, nor am I getting any error.

What event(s) are you using with the combobox? Better to display the error.

[Plater]

Is this combobox supposed to be "updating" the value back in it's datasource?
I would imagine if it were trying to do that whenever it lost focus, and won't give up focus until the datasource says "yeah, I updated it", that it will get stuck there if the datasource does not acknowledge the action.

[Kirsten]

Yes it is suppose to be updating the DataSource.
But why would that matter or make a problem?

Is this combobox supposed to be "updating" the value back in it's datasource?
I would imagine if it were trying to do that whenever it lost focus, and won't give up focus until the datasource says "yeah, I updated it", that it will get stuck there if the datasource does not acknowledge the action.

[Plater]

Yes it is suppose to be updating the DataSource.
But why would that matter or make a problem?

For the exact reasons I just stated. Is the datasource updating itself correctly?
Attach an event handler to the selected item changer then set a breakpoint.
Step through and keep an eye on the datasource with the watch window.
See if changes have been updated?

[Kirsten]

Thanks for your help.
I resolved the problem which was the DataBinding.Text had a value and when I removed it now it's working.

For the exact reasons I just stated. Is the datasource updating itself correctly?
Attach an event handler to the selected item changer then set a breakpoint.
Step through and keep an eye on the datasource with the watch window.
See if changes have been updated?