Hi Laura,

I'm not completely sure how the value of this datatype is stored, but best way to find out is to check the umbraco.config from the /data folder, find a document which has a property of type 'Checkbox list' and see how that data is stored. Once the format is known, you should probably have to do the same with your custom member property.

Hope this helps.

Regards,

/Dirk

c# code for saving member properties would be something like this:

newMember.getProperty("alias").Value = "value";

newMember.XmlGenerate(new System.Xml.XmlDocument());
newMember.Save();

Have a look at this post

http://our.umbraco.org/forum/developers/extending-umbraco/2209-Custom-DataType---DropDownList-Value-Being-Lost

I'm still not having any luck with this, after many unfruitful hours.. I've delved into the umbraco database and can see in the cmsPropertyData table where member additional member info is saved. I see that the umbraco checkboxlist datatype stores as a comma delimited list of the prevalue ID. So I need to iterate through my asp.net checkbox list, and save the value (not text) of the checked items as a string. The value I need is the ID from the cmsDataTypePreValues table.. But I can't get this to work... what am I missing?

To populate my checkbox list I successfully use this code:

Protected Sub LoadTechList()
        Dim TechTypeDataTypeNodeID As Integer = 1079
        Dim dataType As New Document(TechTypeDataTypeNodeID)
        Dim preValueRootElementIterator As XPathNodeIterator = umbraco.library.GetPreValues(1079)
        preValueRootElementIterator.MoveNext()
        'move to first

        Dim preValueIterator As XPathNodeIterator = preValueRootElementIterator.Current.SelectChildren("preValue", "")
        Dim TechTypeListItems As New ListItemCollection()

        While preValueIterator.MoveNext()
            TechTypeListItems.Add(New ListItem(" " + preValueIterator.Current.Value, preValueIterator.Current.GetAttribute("id", "")))
        End While

        'Bind data to checkbox list
        TechType.DataSource = TechTypeListItems
        TechType.DataTextField = "Text"
        TechType.DataValueField = "Value"
        TechType.DataBind()
    End Sub

And to iterate through the checkboxlist control and save the selections to string:

Dim checkedValues As String = ""
            For Each item As ListItem In TechType.Items
                If item.Selected Then
                    checkedValues += item.Value + ","
                End If
            Next
            newMember.getProperty("TechType").Value = checkedValues
            newMember.Save()

I think the DataValueField binding isn't working. The form works without errors, but nothing from the checkboxlist is saved to the db. All my other custom member fields save to the table without problems.

FYI: I gave up on having the checkboxlist values bind to the umbraco prevalues. I ended up recreating the list, with the values in the ascx uercontrol matching the values in the umbraco db. It wasn't worth the effort, since I don't think this form will be updated very much, if at all. However, it would have been a nice feature, if I could have gotten it to work, since then the site administrator wouldn't need me to update the ascx file if he decides to change the values in the checkboxlist.

I use the following code to bind prevalues to an asp.net control:

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If Not Page.IsPostBack Then
            ddlType.DataSource = PreValues.GetPreValues(1079).GetValueList()
            ddlType.DataTextField = "Value"
            ddlType.DataValueField = "ID"
            ddlType.DataBind()
        End If
    End Sub

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