I'm trying to populate an array from a dataset with only a specific column using VB.NET 2010. Is there any code to populate the array directly or must I make use of a query?
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2 Answers
Update:
Assuming you want an array of String:
Dim arr As String() = (From myRow In ds.Tables(0).AsEnumerable
Select myRow.Field(Of String)("yourColumnName")).ToArray
or a list:
Dim list As List(Of String) = (From myRow In ds.Tables(0).AsEnumerable
Select myRow.Field(Of String)("yourColumnName")).ToList
Old:
Make sure the DisplayMember is set to the name of the column you want to see:
comboBox1.DataSource = ds.Tables(0)
comboBox1.DisplayMember= "NameOfColumn"
You might also want to set the ValueMember property to the ID field name from your dataset.
Dim objDataSet As New DataSet
objDataSet = DataSetConsultas("SELECT Nombres, IDTarjeta from Alumnos")
Dim arr As String() = (From myRow In objDataSet.Tables(0).AsEnumerable
Select myRow.Field(Of String)("Nombres")).ToArray
cboAlumnos.Items.Clear()
cboAlumnos.Items.AddRange(arr)
Where Nombres, IDTarjeta are rows in the DB, and Alumnos is the name of the table
