CODEWITHSUNDEEP
c#wpfbindingcode-behind
Chris
Chris

Reputation: 845

Code Behind: Check if property of a control is bound

I´m looking for a way to check in code behind, if a property of a control has been bound and can´t seem to find the right way to do it. I think I need to get the FieldInfo first (using System.Windows.Controls.Control control in a generic method):

FieldInfo te = null;
foreach (PropertyDescriptor prop in TypeDescriptor.GetProperties(control))
{
    if (prop.Name.Equals("Visibility"))
    {
        te = control.GetType().GetField(prop.Name + "Property");
        break;
    }
}

...does find the PropertyDescriptor, but not the FieldInfo.

FieldInfo gg = control.GetType().GetField("Visibility", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
FieldInfo gg1 = control.GetType().GetField("VisibilityProperty", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
FieldInfo gg2 = typeof(Control).GetField("Visibility", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
FieldInfo gg3 = typeof(Control).GetField("VisibilityProperty", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);

...all return null as FieldInfo. When the FieldInfo has been found I would like to check if the value has been bound by doing:

DependencyProperty dp = (DependencyProperty)field.GetValue(control);
if (control.GetBindingExpression(dp) == null) ...

Any ideas?

Upvotes: 1

Views: 1490

Answers (1)

dhilmathy
dhilmathy

Reputation: 2868

You can try using BindingOperations.GetBinding to get Binding Object. Like, 

// textBox3 is an instance of a TextBox
// the TextProperty is the data-bound dependency property
Binding myBinding = BindingOperations.GetBinding(textBox3, TextBox.TextProperty);

Ref. How to: Get the Binding Object from a Bound Target Property

Upvotes: 2

Related Questions