How to bind a dictionary to a gridview?

问题

Is it possible to automatically bind a Dictionary to a Gridview? The closest I've got is:

Dictionary<string, myObject> MyDictionary = new Dictionary<string, myObject>();
// Populate MyDictionary here.
Grid1.DataSource = MyDictionary.Values;
Grid1.DataBind();

This binds the properties in myObject to the gridview, but I'd like to get the key as well. If it's not possible, is there an alternative, e.g. use a repeater? Thanks.

回答1:

You can use:

var data = MyDictionary.Select(x => new List<object>{x.Key, x.Value});

This will give you an IEnumerable<List<object>>, where the IEnumerable represents the "rows" and within each row the List<object> represents the "columns."

This would be slightly different if myObject is a collection type. I can't be certain from your code, but it doesn't look like this is the case.

回答2:

You need to bind the columns to "Key" and "Value", I believe.

回答3:

I think the best way is to convert into List>

List<KeyValuePair<string, object>> list = new List<KeyValuePair<string, object>>();
list.AddRange(dictionary);
Grid1.DataSource = list;

this also allows to do easy sorting:

list.Sort(delegate...);

then pass it as the DataSource.

回答4:

I have no idea how well dictionary works as a itemsSource. I guess not at all unless Dictionary implements IEnumerable or ICollection.

You could however create your own object that holds a Key string property and your Object and have a collection of such items. However that will lack many things Dictionary has ( like unique Keys and such ).

Perhaps Dictionary has a ToList() method

Does it give you an error when putting the Dictionary as a source. If not perhaps you have to set the DisplayMemberPath on the columns as Value and Key.