if i try to checkout an order, go wrong; this is the error

Server Error in '/complete' Application.
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'DropDownList1' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentOutOfRangeException: 'DropDownList1' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[ArgumentOutOfRangeException: 'DropDownList1' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value]
   System.Web.UI.WebControls.ListControl.PerformDataB inding(IEnumerable dataSource) +966
   System.Web.UI.WebControls.ListControl.OnDataBindin g(EventArgs e) +79
   System.Web.UI.WebControls.ListControl.PerformSelec t() +32
   System.Web.UI.WebControls.BaseDataBoundControl.Dat aBind() +99
   System.Web.UI.Control.DataBindChildren() +236
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +178
   System.Web.UI.Control.DataBind() +31
   System.Web.UI.Control.DataBindChildren() +236
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +178
   System.Web.UI.Control.DataBind() +31
   System.Web.UI.Control.DataBindChildren() +236
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +178
   System.Web.UI.Control.DataBind() +31
   System.Web.UI.Control.DataBindChildren() +236
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +178
   System.Web.UI.WebControls.FormView.CreateChildCont rols(IEnumerable dataSource, Boolean dataBinding) +3065
   System.Web.UI.WebControls.CompositeDataBoundContro l.PerformDataBinding(IEnumerable data) +89
   System.Web.UI.WebControls.FormView.PerformDataBind ing(IEnumerable data) +31
   System.Web.UI.WebControls.DataBoundControl.OnDataS ourceViewSelectCallback(IEnumerable data) +126
   System.Web.UI.DataSourceView.Select(DataSourceSele ctArguments arguments, DataSourceViewSelectCallback callback) +98
   System.Web.UI.WebControls.DataBoundControl.Perform Select() +154
   System.Web.UI.WebControls.BaseDataBoundControl.Dat aBind() +99
   System.Web.UI.WebControls.FormView.DataBind() +23
   System.Web.UI.WebControls.BaseDataBoundControl.Ens ureDataBound() +92
   System.Web.UI.WebControls.FormView.EnsureDataBound () +177
   System.Web.UI.WebControls.CompositeDataBoundContro l.CreateChildControls() +100
   System.Web.UI.Control.EnsureChildControls() +134
   System.Web.UI.Control.PreRenderRecursiveInternal() +109
   System.Web.UI.Control.PreRenderRecursiveInternal() +233
   System.Web.UI.Control.PreRenderRecursiveInternal() +233
   System.Web.UI.Control.PreRenderRecursiveInternal() +233
   System.Web.UI.Control.PreRenderRecursiveInternal() +233
   System.Web.UI.Control.PreRenderRecursiveInternal() +233
   System.Web.UI.Control.PreRenderRecursiveInternal() +233
   System.Web.UI.Control.PreRenderRecursiveInternal() +233
   System.Web.UI.Control.PreRenderRecursiveInternal() +233
   System.Web.UI.Control.PreRenderRecursiveInternal() +233
   System.Web.UI.Control.PreRenderRecursiveInternal() +233
   System.Web.UI.Control.PreRenderRecursiveInternal() +233
   System.Web.UI.Control.PreRenderRecursiveInternal() +233
   System.Web.UI.Control.PreRenderRecursiveInternal() +233
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4437




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Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42

The issue is with the code in the book. In the errata section it says to change your line to:

        e.InputParameters("DeliveryCharge") = ddl.SelectedValue


Hope this helps.
Kevin

That reply was for the wrong topic. I think your issue is that you changed either the spelling of pizza or drink in your database. If you have anything other than pizza or drink it will not work because the entries in the drop down list are hard coded.

Hope this helps.
Kevin