I inherited a site which I am in the middle of updating which has a DropDownList and a RangeValidator assigned to it. The data is bound to the dropdown on Page_Load. The values are retrieved from the database so the value property of each item is set to the unique ID of the item in the DB.
The RangeValidator looks something like:
<asp:rangevalidator id="ddRangeValidator" runat="server" ControlToValidate="ddMenu" ErrorMessage="Please select value in range" MinimumValue="1" MaximumValue="100000" Type="Integer">*</asp:rangevalidator>
I have a method which automatically populates this value in jQuery e.g.
$("#ddMenu").val("An Option");
This works, however, when I try to post the page the range validation fails. Then even if I manually select that value, or select another valid value it still won't validate. The only way to make it validate is to select non-valid value and then re-selecting a valid one.
Any ideas?
Update
Here is the data binding code:
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load, Me.Load
If Not Page.IsPostBack Then
Dim ds As New DataSet()
Dim myDbObject As New myDbObject()
ds = myDbObject.ToDataSet() // retrieves all objects from the database
// store the results in a temporary view to filter
Dim dv As DataView
dv = New DataView(ds.Tables(0), "IsLive = True", "ID", DataViewRowState.CurrentRows)
Dim i As Integer = 0
ddMenu.Items.Add("Select a value")
ddMenu.Items.Item(0).Value = 0
// add all objects from filtered list into drop down menu
For i = 0 To dv.Count - 1
With ddMenu.Items
// add a new item
.Add(dv.Item(i).Item("Name"))
// set the Value property as unique ID of object
.Item(i + 1).Value = dv.Item(i).Item("ID")
End With
Next
End If
End If