ListControl.SelectedValue Property

Definition

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Gets or sets the value of the member property specified by the ValueMember property.

public:
 property System::Object ^ SelectedValue { System::Object ^ get(); void set(System::Object ^ value); };

[System.ComponentModel.Bindable(true)]
[System.ComponentModel.Browsable(false)]
public object? SelectedValue { get; set; }

[<System.ComponentModel.Bindable(true)>]
[<System.ComponentModel.Browsable(false)>]
member this.SelectedValue : obj with get, set

Public Property SelectedValue As Object

Property Value

Object

An object containing the value of the member of the data source specified by the ValueMember property.

Attributes

BindableAttribute BrowsableAttribute

Exceptions

InvalidOperationException

The assigned value is null or the empty string ("").

Examples

The following code example shows the SelectedValue returning the value of the property specified by the ValueMember property. This code is an excerpt from the example shown in the ListControl class overview. See ListControl for the whole code listing.

void ListBox1_SelectedValueChanged( Object^ /*sender*/, EventArgs^ /*e*/ )
{
   textBox1->Text="";
   if ( ListBox1->SelectedIndex != -1 )
         textBox1->Text = ListBox1->SelectedValue->ToString();
}

private void ListBox1_SelectedValueChanged(object sender, EventArgs e)
{
    if (ListBox1.SelectedIndex != -1)
    {
        textBox1.Text = ListBox1.SelectedValue.ToString();
        // If we also wanted to get the displayed text we could use
        // the SelectedItem item property:
        // string s = ((USState)ListBox1.SelectedItem).LongName;
    }
}

    Private Sub ListBox1_SelectedValueChanged(ByVal sender As Object, ByVal e As EventArgs)
        If ListBox1.SelectedIndex <> -1 Then
            textBox1.Text = ListBox1.SelectedValue.ToString()
            ' If we also wanted to get the displayed text we could use
            ' the SelectedItem item property:
            ' Dim s = CType(ListBox1.SelectedItem, USState).LongName
        End If
    End Sub
End Class

Remarks

If a property is not specified in ValueMember, SelectedValue returns the results of the ToString method of the object.

SelectedIndex, SelectedValue, and FormattingEnabled are related as follows:

• If FormattingEnabled is false, SelectedIndex will not be set to -1 when SelectedValue is blank.

• If FormattingEnabled is true, SelectedIndex will be set to -1 when SelectedValue is blank.

See also

• ValueMember