Getting Overload error with ASP.NET using VB

  • Thread starter Thread starter multisync
  • Start date Start date
M

multisync

I'm getting the following error:

Overload resolution failed because no accessible 'Add' can be called
with these arguments: 'Public Sub Add(item As
System.Web.UI.WebControls.ListItem)': Value of type 'Admin.clsSites'
cannot be converted to 'System.Web.UI.WebControls.ListItem'

This is my code:
Public Sub LoadSites()
'Cursor.Current = System.Windows.Forms.Cursors.WaitCursor
'cboSites.BeginUpdate()
Dim xDoc As New XmlDocument
xDoc.Load(Server.MapPath("\config.sites.xml"))
Dim xNodelist As XmlNodeList =
xDoc.SelectNodes("/sitedata/site")

For Each xNode As XmlNode In xNodelist
Dim Site As New clsSites
Site.Name = xNode.Attributes.GetNamedItem("name").Value
Site.Server = xNode.ChildNodes.Item(0).InnerText
Me.cboSites.Items.Add(Site) <---ERROR HERE

Next
cboSites.EndUpdate()
Cursor.Current = System.Windows.Forms.Cursors.Default
End Sub

Anyone know how to fix this?
 
Public Class clsSites
Public Name As String
Public Server As String
Sub New()
MyBase.New()
End Sub
Public Overrides Function ToString() As String
Return Me.Name
End Function

End Class
 
Yes - don't try to call methods that don't exist.

There is no method Add in ListItemCollection that takes an instance of
clsSite. And how could there possibly be? That is a class you wrote! It's
not like Microsoft could possibly know about it and define an overload just
for you.
 
multisync said:
For Each xNode As XmlNode In xNodelist
Dim Site As New clsSites
Site.Name = xNode.Attributes.GetNamedItem("name").Value
Site.Server = xNode.ChildNodes.Item(0).InnerText
Me.cboSites.Items.Add(Site) <---ERROR HERE
Next
Click to expand...

The problem is that 'Site' is not an object of type 'ListItem' which is
what the cboSites.Items.Add method is expecting.

Try this (untested):

Me.cboSites.Items.Add(New ListItem(Site.Name, Site.Server))

What this does is create a new ListItem object, assign the properties
of your Site object to the text and value properties of the ListItem
and then finally adds the ListItem to the combo.
 
multisync,

I assume that the cbo is a dropdownlist.

As Marina wrote already can you not add an object to it, in a not databound
situation is it subpossed to get a string.

You can however use the datasource, the datatextfield and the
datavaluefield, however that is a complete other way of doing this.

I hope this helps,

Cor
 
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