I'm binding a Combobox to an Arraylist, and I'd like to set the ValueMember
and DisplayMember properties of the Combobox. Is this possible, or do I
need to bind to a DataTable?

Thanks

Hi,

Yes you can bind to any property contained in a class stored in the
arraylist.

Ken
----------------------
"Michael C#" <(E-Mail Removed)> wrote in message
news:Xtk%d.1526$(E-Mail Removed)...
I'm binding a Combobox to an Arraylist, and I'd like to set the ValueMember
and DisplayMember properties of the Combobox. Is this possible, or do I
need to bind to a DataTable?

Thanks

"Michael C#" <(E-Mail Removed)> schrieb:
> I'm binding a Combobox to an Arraylist, and I'd like to set the
> ValueMember and DisplayMember properties of the Combobox. Is this
> possible

Yes.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

Thank you

"Ken Tucker [MVP]" <(E-Mail Removed)> wrote in message
news:%(E-Mail Removed)...
> Hi,
>
> Yes you can bind to any property contained in a class stored in the
> arraylist.
>
> Ken
> ----------------------
> "Michael C#" <(E-Mail Removed)> wrote in message
> news:Xtk%d.1526$(E-Mail Removed)...
> I'm binding a Combobox to an Arraylist, and I'd like to set the
> ValueMember
> and DisplayMember properties of the Combobox. Is this possible, or do I
> need to bind to a DataTable?
>
> Thanks
>
>
>

"Herfried K. Wagner [MVP]" <hirf-spam-me-(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> "Michael C#" <(E-Mail Removed)> schrieb:
>> I'm binding a Combobox to an Arraylist, and I'd like to set the
>> ValueMember and DisplayMember properties of the Combobox. Is this
>> possible
>
> Yes.
>

Well as long as it's possible.

I believe that you have to set the DataSource name to "ArrayList" whereas for
a Datatable, you set this to the DataTable's name. At least this is what you
have to for binding the DataGrid to an ArrayList so I would suppose it's the
same for a combo box. The DataMember has no meaning when binding to an
arraylist.

"Michael C#" wrote:

>
> "Herfried K. Wagner [MVP]" <hirf-spam-me-(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > "Michael C#" <(E-Mail Removed)> schrieb:
> >> I'm binding a Combobox to an Arraylist, and I'd like to set the
> >> ValueMember and DisplayMember properties of the Combobox. Is this
> >> possible
> >
> > Yes.
> >
>
> Well as long as it's possible.
>
>
>

So you can't set the Value and a separate distince DisplayMember? For
instance:

1, Yes
2, No
3, Maybe

If I display and choose "No" in the Combobox, there is no way to retrieve
the value 2 which is related to that option? It seems like that's a bit of
important functionality to be missing.

"Dennis" <(E-Mail Removed)> wrote in message
news:BC588E8D-C297-4395-B1C1-(E-Mail Removed)...
>I believe that you have to set the DataSource name to "ArrayList" whereas
>for
> a Datatable, you set this to the DataTable's name. At least this is what
> you
> have to for binding the DataGrid to an ArrayList so I would suppose it's
> the
> same for a combo box. The DataMember has no meaning when binding to an
> arraylist.
>
> "Michael C#" wrote:
>
>>
>> "Herfried K. Wagner [MVP]" <hirf-spam-me-(E-Mail Removed)> wrote in message
>> news:(E-Mail Removed)...
>> > "Michael C#" <(E-Mail Removed)> schrieb:
>> >> I'm binding a Combobox to an Arraylist, and I'd like to set the
>> >> ValueMember and DisplayMember properties of the Combobox. Is this
>> >> possible
>> >
>> > Yes.
>> >
>>
>> Well as long as it's possible.
>>
>>
>>

"Michael C#" <(E-Mail Removed)> schrieb:
>>> I'm binding a Combobox to an Arraylist, and I'd like to set the
>>> ValueMember and DisplayMember properties of the Combobox. Is this
>>> possible
>>
>> Yes.
>>
>
> Well as long as it's possible.

???

Sample:

\\\
Private Sub Form1_Load( _
ByVal sender As Object, _
ByVal e As EventArgs _
) Handles MyBase.Load
Dim al As New ArrayList
For i As Integer = 1 To 20
Dim p As New Person
p.Name = "Name " & CStr(i)
p.Age = 70 - i
al.Add(p)
Next i
With Me.ListBox1
.DisplayMember = "Name"
.ValueMember = "Age"
.DataSource = al
End With
End Sub

Private Sub ListBox1_SelectedIndexChanged( _
ByVal sender As Object, _
ByVal e As EventArgs _
) Handles ListBox1.SelectedIndexChanged
MsgBox("Selected value: " & CStr(Me.ListBox1.SelectedValue))
End Sub
..
..
..
Public Class Person
Private m_Name As String
Private m_Age As Integer

Public Property Name() As String
Get
Return m_Name
End Get
Set(ByVal Value As String)
m_Name = Value
End Set
End Property

Public Property Age() As Integer
Get
Return m_Age
End Get
Set(ByVal Value As Integer)
m_Age = Value
End Set
End Property

Public Overrides Function ToString() As String
Return Me.Name & " (" & Me.Age.ToString() & ")"
End Function
End Class
///

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

Thank you for expounding on your initial 4-character response. I appreciate
it.

"Herfried K. Wagner [MVP]" <hirf-spam-me-(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> "Michael C#" <(E-Mail Removed)> schrieb:
>>>> I'm binding a Combobox to an Arraylist, and I'd like to set the
>>>> ValueMember and DisplayMember properties of the Combobox. Is this
>>>> possible
>>>
>>> Yes.
>>>
>>
>> Well as long as it's possible.
>
> ???
>
> Sample:
>
> \\\
> Private Sub Form1_Load( _
> ByVal sender As Object, _
> ByVal e As EventArgs _
> ) Handles MyBase.Load
> Dim al As New ArrayList
> For i As Integer = 1 To 20
> Dim p As New Person
> p.Name = "Name " & CStr(i)
> p.Age = 70 - i
> al.Add(p)
> Next i
> With Me.ListBox1
> .DisplayMember = "Name"
> .ValueMember = "Age"
> .DataSource = al
> End With
> End Sub
>
> Private Sub ListBox1_SelectedIndexChanged( _
> ByVal sender As Object, _
> ByVal e As EventArgs _
> ) Handles ListBox1.SelectedIndexChanged
> MsgBox("Selected value: " & CStr(Me.ListBox1.SelectedValue))
> End Sub
> .
> .
> .
> Public Class Person
> Private m_Name As String
> Private m_Age As Integer
>
> Public Property Name() As String
> Get
> Return m_Name
> End Get
> Set(ByVal Value As String)
> m_Name = Value
> End Set
> End Property
>
> Public Property Age() As Integer
> Get
> Return m_Age
> End Get
> Set(ByVal Value As Integer)
> m_Age = Value
> End Set
> End Property
>
> Public Overrides Function ToString() As String
> Return Me.Name & " (" & Me.Age.ToString() & ")"
> End Function
> End Class
> ///
>
> --
> M S Herfried K. Wagner
> M V P <URL:http://dotnet.mvps.org/>
> V B <URL:http://classicvb.org/petition/>

Why wont this work with a structure and combo box

Public Structure myStructure
Public Name As String
Public Title As String
End Structure

Dim arList As New ArrayList
Dim i As Integer

For i = 0 To 10
Dim ms As New myStructure
ms.Name = "Name " & i.ToString
ms.Title = "Title " & i.ToString
arList.Add(ms)
Next
'
With cmboMyTest
.DisplayMember = "Name"
.ValueMember = "Title"
.DataSource = arList
End With

When I run this, the combo box is filled with the fully qualified name
of the form and "+myStructure"

That is: "ObjectIntro.FormSecondTest+myStructure" is displayed in the
10 items of the combo box.

Thanks for all the help, always.

John

On Mon, 21 Mar 2005 00:45:28 +0100, "Herfried K. Wagner [MVP]"
<hirf-spam-me-(E-Mail Removed)> wrote:

>"Michael C#" <(E-Mail Removed)> schrieb:
>>>> I'm binding a Combobox to an Arraylist, and I'd like to set the
>>>> ValueMember and DisplayMember properties of the Combobox. Is this
>>>> possible
>>>
>>> Yes.
>>>
>>
>> Well as long as it's possible.
>
>???
>
>Sample:
>
>\\\
>Private Sub Form1_Load( _
> ByVal sender As Object, _
> ByVal e As EventArgs _
>) Handles MyBase.Load
> Dim al As New ArrayList
> For i As Integer = 1 To 20
> Dim p As New Person
> p.Name = "Name " & CStr(i)
> p.Age = 70 - i
> al.Add(p)
> Next i
> With Me.ListBox1
> .DisplayMember = "Name"
> .ValueMember = "Age"
> .DataSource = al
> End With
>End Sub
>
>Private Sub ListBox1_SelectedIndexChanged( _
> ByVal sender As Object, _
> ByVal e As EventArgs _
>) Handles ListBox1.SelectedIndexChanged
> MsgBox("Selected value: " & CStr(Me.ListBox1.SelectedValue))
>End Sub
>.
>.
>.
>Public Class Person
> Private m_Name As String
> Private m_Age As Integer
>
> Public Property Name() As String
> Get
> Return m_Name
> End Get
> Set(ByVal Value As String)
> m_Name = Value
> End Set
> End Property
>
> Public Property Age() As Integer
> Get
> Return m_Age
> End Get
> Set(ByVal Value As Integer)
> m_Age = Value
> End Set
> End Property
>
> Public Overrides Function ToString() As String
> Return Me.Name & " (" & Me.Age.ToString() & ")"
> End Function
>End Class
>///