Newbie Help! SqlDataSource + Select Parameter

May 21, 2008

 Why does this not work?

        <asp:SqlDataSource ID="employeeSource"
            runat="server"
            ConnectionString="<%$ ConnectionStrings:mainDB %>"
            DataSourceMode="DataReader"
            ProviderName="System.Data.SqlClient"
            OnSelecting="OnSourceSelecting"
            SelectCommand="SELECT * FROM Employees WHERE ID = @employeeID">
            
            <SelectParameters>
                <asp:Parameter Name="@employeeID" Type="Int32" />
            </SelectParameters>
        </asp:SqlDataSource>

In code behind:

        protected void OnSourceSelecting(object sender, SqlDataSourceCommandEventArgs args) {
            // THIS LINE THROWS EXCEPTION: An SqlParameter with ParameterName '@campaignID' is not contained by this SqlParameterCollection.
            args.Command.Parameters["@employeeID"].Value = 3;    // In future, will use dynamic value.
        }
        
If, instead I do this:    
        
        <asp:SqlDataSource ID="employeeSource"
            runat="server"
            ConnectionString="<%$ ConnectionStrings:mainDB %>"
            DataSourceMode="DataReader"
            ProviderName="System.Data.SqlClient"
            OnSelecting="OnSourceSelecting"
            SelectCommand="SELECT * FROM Employees WHERE ID = @employeeID">
            
            <SelectParameters>
                <asp:QueryStringParameter Name="@campaignID" QueryStringField="id" />
            </SelectParameters>
        </asp:SqlDataSource>

(Of course I call page with EmployeePage.aspx?id=123)
I get the exception: Must declare the scalar variable "@employeeID".

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<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:RentTodaySQL %>" DeleteCommand="DELETE FROM [Rentals] WHERE [RentalID] = @original_RentalID"
InsertCommand="INSERT INTO [Rentals] ([Headline], [Description], [MoveInSpecial], [MonthlyCost], [Deposit], [AvailableDate], [FeaturedListing], [UserID], [Address], [Address2], [City], [State], [Zip], [LeaseTermID], [LeaseDetails], [Section8], [Section8Details], [PetsAllowed], [PetsDetails], [PetDeposit], [ApplicationFee], [ApplicationDetails], [SmokingAllowed], [RentalCategoryID], [Bedrooms], [Bathrooms], [SqFootage], [LotSize], [YearBuilt], [DefaultImageID]) VALUES (@Headline, @Description, @MoveInSpecial, @MonthlyCost, @Deposit, @AvailableDate, @FeaturedListing, @UserID, @Address, @Address2, @City, @State, @Zip, @LeaseTermID, @LeaseDetails, @Section8, @Section8Details, @PetsAllowed, @PetsDetails, @PetDeposit, @ApplicationFee, @ApplicationDetails, @SmokingAllowed, @RentalCategoryID, @Bedrooms, @Bathrooms, @SqFootage, @LotSize, @YearBuilt, @DefaultImageID)"
OldValuesParameterFormatString="original_{0}" SelectCommand="SELECT * FROM [Rentals] WHERE ([UserID] = @UserID)"
UpdateCommand="UPDATE [Rentals] SET [Headline] = @Headline, [Description] = @Description, [MoveInSpecial] = @MoveInSpecial, [MonthlyCost] = @MonthlyCost, [Deposit] = @Deposit, [AvailableDate] = @AvailableDate, [FeaturedListing] = @FeaturedListing, [UserID] = @UserID, [Address] = @Address, [Address2] = @Address2, [City] = @City, [State] = @State, [Zip] = @Zip, [LeaseTermID] = @LeaseTermID, [LeaseDetails] = @LeaseDetails, [Section8] = @Section8, [Section8Details] = @Section8Details, [PetsAllowed] = @PetsAllowed, [PetsDetails] = @PetsDetails, [PetDeposit] = @PetDeposit, [ApplicationFee] = @ApplicationFee, [ApplicationDetails] = @ApplicationDetails, [SmokingAllowed] = @SmokingAllowed, [RentalCategoryID] = @RentalCategoryID, [Bedrooms] = @Bedrooms, [Bathrooms] = @Bathrooms, [SqFootage] = @SqFootage, [LotSize] = @LotSize, [YearBuilt] = @YearBuilt, [DefaultImageID] = @DefaultImageID WHERE [RentalID] = @original_RentalID">
<SelectParameters>
<asp:Parameter DefaultValue="<%= SessionHandler.User.ID %>" Name="UserID" Type="Int32" />
</SelectParameters>
 

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