How to find an item in a WinForms ComboBox (ComboBoxAdv) using its ValueMember?
Value member
We can find an item using ValueMember property, by deriving ComboBoxAdv and using reflection, WinForms ComboBox item can be retrived using ValueMember property.
C#
public int FindTextByValue(object Value)
{
int i = -1;
if (this.DataSource != null)
{
string val = Value.ToString();
IList collection = (IList)this.DataSource;
foreach (object o in collection)
{
Type t = o.GetType();
if (t != null)
{
PropertyInfo propertyInfo = t.GetProperty(this.ValueMember);
i++;
if (propertyInfo.GetValue(o, null).ToString() == val)
{
break;
}
}
}
}
return i;
}
VB
Public Function FindTextByValue(ByVal Value As Object) As Integer
Dim i As Integer = -1
If Me.DataSource IsNot Nothing Then
Dim val As String = Value.ToString()
Dim collection As IList = CType(Me.DataSource, IList)
For Each o As Object In collection
Dim t As Type = o.GetType()
If t IsNot Nothing Then
Dim propertyInfo As PropertyInfo = t.GetProperty(Me.ValueMember)
i += 1
If propertyInfo.GetValue(o, Nothing).ToString() = val Then
Exit For
End If
End If
Next o
End If
Return i
End Function
Sample:
I hope you enjoyed learning on how to find an item in a WinForms ComboBox using its value member.
You can refer to our WinForms ComboBox featuretour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our example to understand how to create and manipulate data.
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