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Populating a combo box

How do I populate the values in a combo box. Say a combo box for Gender - just a couple of values preferably specified in an Enum. Using designer to build the form

Current code is attached.
Class has a combo box member named GenderCBox
Public Class NewPatient
    Private Sub NewPatient_FormClosed(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosedEventArgs) Handles MyBase.FormClosed
        Application.Exit()
    End Sub
 
    Private Enum Genders
        Male
        Female
    End Enum
End Class

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sunnycoder
Asked:
sunnycoder
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3 Solutions
 
SameerJagdaleCommented:

Gender[] gs = new Gender[] { Gender.Male,Gender.Female };
this.comboBox1.DataSource = gs;
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BinuthCommented:
try this
foreach (string val in Enum.GetNames(typeof(Genders)))
{
  GenderCBox.Items.Add(val);
}

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BinuthCommented:
vb.net code
For Each Item As String In [Enum].GetNames(GetType(Genders))
   GenderCBox.Items.Add(Item)
Next

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Fernando SotoCommented:
Hi sunnycoder;

This is how you can do what you want in Visual Basic .Net

        Dim genderType() As Genders = New Genders() {Genders.Male, Genders.Female}
        Me.GenderCBox.DataSource = genderType

Fernando


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sunnycoderAuthor Commented:
Binuth,

Your code works perfect. I had a couple of questions ... The combo box has 3 values -male, female and a blank. Where did the blank come from?

Also
[Enum].GetNames(GetType(Genders))

GetType(Genders) -> gets the type that is Enum Genders
GetNames -> gets the strings defined in Enum Genders
[Enum].  -> what is the significance of this piece of code.

Fernando,

Your code works fine too. A question for you too :)
Dim genderType() As Genders = New Genders() {Genders.Male, Genders.Female}
Here we are creating an array of type Enum Genders and filling it up with enum values. Am I right? What if order or members of enum in the original definition changes? Is there a way by which we dont have to worry about keeping this section of code in sync with the original Enum definition.

Thanks guys ... you rock!
sunnycoder
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zonkermanCommented:
You question, "How do I populate the values in a combo box"..."Using designer to build the form".
I think your direct target question is how to do this in the designer so no code is needed.  Here is how with Visual Studio 2005:

1)  Select your combo box control that is on your form designer
2)  Locate your "Properties"  window (press F4) which should be displaying properites for the selected combo box
3)  While your properties window is in "Categorized" order, go to the "Data" section in it and select the "Items" property. When you do this you will see a small button to the right of the property with 3 dots in it.  Click this button and enter your values.
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sunnycoderAuthor Commented:
Awesome guys ... I am learning more than any book could have taught me in this time. Thanks zonkerman - that was an nice tip.
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Fernando SotoCommented:
Hi sunnycoder;

To your question, "Here we are creating an array of type Enum Genders and filling it up with enum values. Am I right?", Actually we are creating and array of Enum Genders value types and not multiple structures of Enum Genders as can be seen from the image of the watch window below. Each element of the array is an individual value of the Enum Genders.

To your question, "What if order or members of enum in the original definition changes? Is there a way by which we dont have to worry about keeping this section of code in sync with the original Enum definition.", When creating an enumeration structure it needs to be carfully considered before hand and any additions should be made to the end of the list so that code compiled aganst it already is not effected and will remain in sync.

Fernando

SP32-105.jpg
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sunnycoderAuthor Commented:
Thanks guys :o)
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