CODEWITHSUNDEEP
c#asp.netgenericsdevexpress
Izzy
Izzy

Reputation: 6866

Making a collection of controls readonly

I am currently working a web form application where I am using Devexpress controls. The controls I am using are (but not limited to):

  1. BootstrapComboBox
  2. BootstrapSpinEdit
  3. BootstrapTextBox

The form is fairly big so what I am trying to achieve is pass in e.g. IEnumerable<T> and then loop over the collection and set the ReadOnly property to true. I know I can do one control at a time but I have over 50 controls so I was wondering if there is a more generic way.

I have the following snippet:

public static void MakeControlReadOnly<T>(this IEnumerable<T> controlCollection)
{
   foreach(var c in controlCollection)
      c.ReadOnly = true;
}

But I keep getting an error:

Severity Code Description Project File Line Suppression State Error CS1061 'T' does not contain a definition for 'ReadOnly' and no extension method 'ReadOnly' accepting a first argument of type 'T' could be found (are you missing a using directive or an assembly reference?)

I understand the error but I am not sure how to overcome it.

Upvotes: 0

Views: 416

Answers (2)

Antoine V
Antoine V

Reputation: 7204

Try implicit type T as the ASPxEditBase, the base editable control of DevExpress

public static void MakeControlReadOnly<T>(this IEnumerable<T> controlCollection)
              where T: ASPxEditBase
{
   controlCollection.ToList().ForEach(x=> x.ReadOnly = true);
}

Upvotes: 3

hawkstrider
hawkstrider

Reputation: 4341

You can put a type constraint on the generic for the base class that contains the readonly property

public static void MakeControlReadOnly<T>(this IEnumerable<T> controlCollection) where T: BaseType //Set this to the correct base type
{
   foreach(var c in controlCollection)
      c.ReadOnly = true;
}

Upvotes: 2

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