Or maybe not – the reason behind this is not entirely clear to me.
The Autocomplete widgets provides suggestions while you type into the field.
This example requires that a Text Box and Error Provider control have been created on a form.
In this article I will take you through the various scenarios in which the combobox can be binded to the datasource in MVVM way.
This is of type object and we can bind any type derived from object type with this property.
Since we will be using the MVVM binding for our combo boxes in that case this is the property which we can use to notify VM that item has been selected. Selected Value and Selected Value Path – These are the two most confusing and misinterpreted properties for combobox.
Apart from that we will also go through the three properties which the developers are most confused with i.e.
Selected Item, Selected Value and Display Member Path. Selected Item – Selected Item helps to bind the actual value from the Data Source which will be displayed.
In my windows form projects , i have validated the fields using Boolean method.
If the user has made changes, but not saved, and tries to select a different option from the combobox, I want to warn them and give them a chance to cancel or save. private int prev Example Index = 0; private void cbx_Example_Enter(object sender, Event Args e) private void cbx_Example_Selection Change Committed(object sender, Event Args e) You could use a message filter to intercept clicks and key presses, which would allow you to prevent the combo box's normal behaviour.
I am in need of a "Before Value Change" event with a cancelable event argument. But I think you'd be better off disabling the combo box when the user makes a change, and require them to either save or revert their changes.
I have a form, and want to check if the user filled it in correctly. Sorry for my bad English, it's not my mother's language.
In the form there's a combo box; how can I build the "if" statement for checking whether the user picked an item from it ?