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POLate binding and Option Strict
 

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  1. POLate binding and Option Strict
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    <p>I have this problem with late binding: I am creating a grocery list application. I have a class named <code>Item</code> which stores the <code>name</code>, <code>price</code>, <code>quantity</code>, and <code>description</code> of an item on the grocery list. </p> <p>I have a module named <code>ListCollection</code> which defines a <code>Collection</code> of <code>Item</code> objects. I have created an <code>Edit</code> form which will automatically display the currently selected <code>ListCollection</code> item properties, but whenever I attempt to fill the text boxes, it tells me that <code>Option Strict</code> disallows late binding. </p> <p>I COULD take the easy route and disable <code>Option Strict</code>, but I'd prefer to figure out what the problem is so I know for future reference.</p> <p>I shall paste pertinent code here. (Late binding error is in <code>EditItem.vb</code>.)</p> <p>Item.vb code:</p> <pre><code>' Member variables: Private strName As String ' Constructor Public Sub New() strName = "" ' Name property procedure Public Property Name() As String Get Return strName End Get Set(ByVal value As String) strName = value End Set End Property </code></pre> <p>ListCollection.vb code:</p> <pre><code>' Create public variables. Public g_selectedItem As Integer ' Stores the currently selected collection item. ' Create a collection to hold the information for each entry. Public listCollection As New Collection ' Create a function to simplify adding an item to the collection. Public Sub AddName(ByVal name As Item) Try listCollection.Add(name, name.Name) Catch ex As Exception MessageBox.Show(ex.Message) End Try End Sub </code></pre> <p>EditItem.vb code:</p> <pre><code>Private Sub EditItem_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load ' Set the fields to the values of the currently selected ListCollection item. txtName.Text = ListCollection.listCollection(g_selectedItem).Name.Get ' THIS LINE HAS THE ERROR! </code></pre> <p>I have tried declaring a <code>String</code> variable and assigning the <code>Item</code> property to that, and I have also tried grabbing the value directly from the <code>List</code> item (not using the <code>Get</code> function), and neither of these made a difference. </p> <p>How can I fix this problem? </p>
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    1. USPeter Mortensen
    1. USTodd Bauer
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