Posted Apr pm Rajitha Wimalasooriya. Add your solution here. OK Paste as. Treat my content as plain text, not as HTML. Existing Members Sign in to your account.
This email is in use. Do you need your password? Submit your solution! When answering a question please: Read the question carefully. Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome. Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question. Monday, July 30, PM. Let's make an example, Code Snippet. Code Snippet. Thursday, August 2, AM. Hi, MrBones, Of couse, it could work, and what you should do is to write your own ExpandableObjectConverter Please check my sample according to your request.
Wednesday, August 1, AM. My dummy class for int List Code Snippet. I feel like I may not have explained myself to clearly. I apologize. In you're case I'd be dealing with a list of myIntLists. Wednesday, August 1, PM. Behavior of this dummy test: Test 1: By default the program starts with a collection of objects in the PropertyGrid. Set the "Value" property in the property grid right away and all objects in the property grid will have their "Value" property set to whatever number was entered.
Click on the "Single Obj" button and you can see the value is still there. Results: Works properly. In our case, we create a PropertyDescriptor object of type EmployeeCollectionPropertyDescriptor for each item in the employee list and add it to the PropertyDescriptor collection.
Note : Only the employee list members will be visible to the PropertyGrid then. If you want to provide descriptions about other properties, i. EmployeeCollectionPropertyDescriptor is our custom property descriptor class derived from the abstract base class PropertyDescriptor. This class is used to format display name and description the way we want to.
My implementation associates the PropertyDescriptor with the EmployeeCollection and an index to the appropriate item. Both will be provided during construction an alternative implementation would be to let the PropertyDescriptor reference the Employee object directly.
Have a look at the implementation of DisplayName and Description : DisplayName will be formatted to return the full name of an employee and Description returns a more descriptive string for an employee. The implementation of Organization is simple. It just creates some sample objects of type Employee and adds them to the EmployeeCollection.
Organization has only the employee collection as a member, which will be returned in a property Employees. Note the use of a TypeConverterAttribute attached to Employees property. This will be needed to make the Employees property expandable, that we can see the collection content at all. An instance of Organization will be created in the constructor of the Form1 class and assigned to the PropertyGrid :. The result of the implementation so far is shown in figure 5. The items are not displayed by sequence number anymore.
The employees in the list are displayed by their full names. The collection is editable. If you select the value side of the employee node in the PropertyGrid , you will see a button to call the standard editor customizing the editor fits into this context but will be a topic for the next article to modify the employee collection see figure 6 :.
In figure 5, you see the class name PropertyGridSample. Employee in the value field of the PropertyGrid. That doesn't look nice. Furthermore, we cannot view or edit the employee data inline. This is what we improve now. A PropertyGrid uses a type converter attached to an object or property to customize the view of an item in the PropertyGrid. Type converter objects are of type TypeConverter and its most common use is to convert to and from a text representation. A custom type converter derives from TypeConverter.
A type converter can be attached to a property or a class by using the TypeConverterAttribute. We already used one type converter in the Organization class to make the Employees property expandable:. ExpandableObjectConverter is one of the type converters defined by the. Returns whether the collection of standard values returned from GetStandardValues is an exclusive list of possible values, using the specified context. Returns whether this object supports a standard set of values that can be picked from a list, using the specified context.
Gets the Type of the current instance. Creates a shallow copy of the current Object. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Please rate your experience Yes No. Any additional feedback? Namespace: System. ComponentModel Assembly: System. Note You should never access a type converter directly. In this article.
Inherited from TypeConverter. CanConvertFrom Type. CanConvertTo Type. Returns whether this converter can convert the object to the specified type. ConvertFrom Object. Converts the given value to the type of this converter.
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