WinForm数据绑定复选框的值

Question

I get an exception when my databound checkbox is confronted with a null value:

{"Cannot bind to the property or column boolValue on the  DataSource.\r\nParameter name: dataMember"}

Is there a way to have the checkbox default to unchecked on a null value. I have looked in the databinding properties and on MSDN but can not find anything that seems relevant

Answer 1

You can use Binding.NullValue property for that. But make sure you also set Binding.FormattingEnabled property to true .

For instance, something like this:

var dataSource = ...;
checkBox.DataBindings.Add("Checked", dataSource, "{PropertyName}",
    true, // formattingEnabled
    DataSourceUpdateMode.OnPropertyChanged,
    false // nullValue
);