CODEWITHSUNDEEP
c#.netwinformspropertygrid
Yuriy
Yuriy

Reputation: 2711

How to enumerate PropertyGrid items?

I have a PropertyGrid with assigned to it some object.

var prpGrid = new PropertyGrid();
prp.SelectedObject = myObject;

I want to get all grid items like I can get selectedGridItem property:

var selectedProperty = prpGrid.SelectedGridItem;

Can I do this?

Upvotes: 9

Views: 7758

Answers (3)

Simon Mourier
Simon Mourier

Reputation: 139216

Here is a piece of code that will retrieve all GridItem objects of a property grid:

public static GridItemCollection GetAllGridEntries(this PropertyGrid grid)
{
    if (grid == null)
        throw new ArgumentNullException("grid");

    var field = grid.GetType().GetField("gridView", BindingFlags.NonPublic | BindingFlags.Instance);
    if (field == null)
    {
        field = grid.GetType().GetField("_gridView", BindingFlags.NonPublic | BindingFlags.Instance);
        if (field == null)
            return null;
    }

    var view = field.GetValue(grid);
    if (view == null)
        return null;

    try
    {
        return (GridItemCollection)view.GetType().InvokeMember("GetAllGridEntries", BindingFlags.InvokeMethod | BindingFlags.NonPublic | BindingFlags.Instance, null, view, null);
    }
    catch
    {
        return null;
    }
}

Of course, since this is using an undocumented private field of the Property Grid, is not guaranteed to work in the future :-)

Once you have all the GridItems, you can filter them using the GridItem.GridItemType property.

Upvotes: 6

Fejs
Fejs

Reputation: 2888

I know this is an old question, but I have just encountered the same issue and solved it using this code (suppose PropertyGrid variable is called grid):

public void IteratePropertyGrid()
{
    GridItemCollection categories;
    if (grid.SelectedGridItem.GridItemType == GridItemType.Category)
    {
        categories = grid.SelectedGridItem.Parent.GridItems;
    }
    else
    {
        categories = grid.SelectedGridItem.Parent.Parent.GridItems;
    }

    foreach (var category in categories)
    {
        if (((GridItem)category).GridItemType == GridItemType.Category)
        {
            foreach (GridItem gi in ((GridItem)category).GridItems)
            {
                // Do something with gi                         
            }
        }
    }
}

Of course, this example can be used with simple property grid which has only one level of categories.

Upvotes: 1

Thomas Zoechling
Thomas Zoechling

Reputation: 34263

If you only need the object's properties, you can get those via Reflection: 

PropertyDescriptorCollection myObjectProperties = TypeDescriptor.GetProperties(myObject);

If you did hide some of the properties with BrowsableAttribute(false), you can use GetProperties(Type, Attribute[]) to filter those out.

I am not aware of a method that returns a GridItem collection.

Update
Of course you can also obtain the string that the PropertyGrid uses for the labels via Reflection.
If you did decorate the property with DisplayNameAttribute("ABC"), you should be able to access DisplayName via GetCustomAttributes(Type, Boolean). Otherwise just use the Name of the PropertyDescriptor.

Upvotes: 2

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