Pass multiple select list value to objectdatasource parameter

Using an ObjectDataSource to get a listbox in multiple select mode.  I can grab the value as a single value but the value of the parameter doesn’t seem to pass when set as multiple.  Would really appreciate an example of how to make this work if you know.  

Asp.net
<asp:ListBox ID="lstAction" runat="server" Rows="3" SelectionMode="Multiple"></asp:ListBox>

<asp:ObjectDataSource ID="odsSalesSC" runat="server" OldValuesParameterFormatString="original_{0}" SelectMethod="GetData" TypeName="RapidFire.RFTableAdapters.USP_TOTAL_ORDERCALLSTableAdapter" OnSelecting="odsSalesSC_Selecting" OnSelected="odsSalesSC_Selected">
            <SelectParameters>
                <asp:ControlParameter ControlID="lstAction" Name="action" PropertyName="SelectedValue" Type="String" ConvertEmptyStringToNull="true" />                
            </SelectParameters>
        </asp:ObjectDataSource>

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Code behind

List<string> lAction = new List<string>();
        lAction.add("1");
        lAction.add("2");
        lAction.add("3");
        listAction.DataSource = lAction;

protected void odsSalesSC_Selecting(object sender, ObjectDataSourceSelectingEventArgs e)
        {
            String strAction = String.Empty;
            foreach (ListItem liAction in lstAction.Items)
            {
                if (liAction.Selected)
                {
                    strAction += "'" + liAction.Value + "',";
                }
            }
            strAction = strAction.Substring(0, strAction.Length - 1);
            e.InputParameters["action"] = strAction;
           //value when I debug is '1','2','3'
            }
}

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ALTER PROCEDURE [dbo].[USP_TOTAL_ORDERCALLS] 
      -- Add the parameters for the stored procedure here
@action as varchar(50) = null,
AS
BEGIN
      -- SET NOCOUNT ON added to prevent extra result sets from
      -- interfering with SELECT statements.
      SET NOCOUNT ON;

if (@action is null)
      begin
            select * from
            VIEW_TOTAL_ORDERSCALLS
            where
            SalesAction = coalesce(@action, SalesAction)
      end
else
      begin
            select * from 
            VIEW_TOTAL_ORDERSCALLS
            where
            SalesAction in (@action)
            
end

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Scarlett72Asked:
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Johny BravoConnect With a Mentor Commented:
Try adding
odsSalesSC.SelectParameters.Clear();
odsSalesSCSelectParameters.Add("YourParamName",paramValues);
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