Check if a data colum is NULL or not.

[VB Novice Hendri]

The code below is what I'm using. How do I check if there is data before creating a label.

Public Class Form1
Private recipesLst As List(Of Recipe) = New List(Of Recipe)()
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim connString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\\Test.accdb;"

Using cn As OleDbConnection = New OleDbConnection(connString)
cn.Open()
Dim cmdText As String = "SELECT RecipeID, RecipeName, OtherData FROM Eiergeregte"

Using cmd As OleDbCommand = New OleDbCommand(cmdText, cn)
Dim reader = cmd.ExecuteReader()

While reader.Read()
ListBox1.Items.Add(reader("RecipeName"))
recipesLst.Add(New Recipe With {
.RecipeID = Convert.ToInt32(reader("RecipeID")),
.RecipeName = reader("RecipeName").ToString(),
.OtherData = reader("OtherData").ToString()
})
End While
End Using
End Using
End Sub
Private Sub ListBox1_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ListBox1.SelectedIndexChanged
Dim recipeSelected As String = ListBox1.SelectedItem.ToString()
Dim result = recipesLst.Where(Function(x) x.RecipeName = recipeSelected).FirstOrDefault()
TextBox1.Text = result.RecipeID.ToString()
TextBox2.Text = result.RecipeName
TextBox3.Text = result.OtherData
End Sub
End Class
Class Recipe
Public Property RecipeID As Integer
Public Property RecipeName As String
Public Property OtherData As String
End Class

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