ArrayList and ListBox

[Bill Gower]

Why can't an ArrayList be passed to the ListBox.AddRange method?

Bill

 

[ClayB]

An ArrayList is not a 1 dimensional Array object (or
ListBoxObjectCOllection) which is what ListBox.AddRange accepts. You
can however pass ArrayList.ToArray.

listBox1.AddRange(arrayList1.ToArray(typeof());
or
listBox1.AddRange(arrayList1.ToArray(typeof(MyObject));

======================
Clay Burch
Syncfusion, Inc.

 

[Bill Gower]

When I try the first one I get an error that say that it expects a type so I
put string[] as the parameter to typeof() and then I get an error stating
the AddRange method has some invalid arguments and it can't convert from
System.Array to System.Windows.Forms.ListBox.ObjectCollection.

Bill

 

[Bill Gower]

I got it. It is listbox1.AddRange(ArrayList1.ToArray());

When I try the first one I get an error that say that it expects a type so
I put string[] as the parameter to typeof() and then I get an error
stating the AddRange method has some invalid arguments and it can't
convert from System.Array to
System.Windows.Forms.ListBox.ObjectCollection.

Bill

An ArrayList is not a 1 dimensional Array object (or
ListBoxObjectCOllection) which is what ListBox.AddRange accepts. You
can however pass ArrayList.ToArray.

listBox1.AddRange(arrayList1.ToArray(typeof());
or
listBox1.AddRange(arrayList1.ToArray(typeof(MyObject));

======================
Clay Burch
Syncfusion, Inc.