?
Solved

Getting Scope_Identity / Output Value from Stored Procedure

Posted on 2011-03-14
7
Medium Priority
?
737 Views
Last Modified: 2012-05-11
Hello,
I am not able to extract the value of an output parameter. I am using an objectDataSource that references a SQL Stored Procedure. The error I get is "Object reference not set to an instance of an object."

here is the codebehind that fires the error
   protected void WorkOrderDataSource_Inserted(object sender, ObjectDataSourceStatusEventArgs e)
    {
        if (e.Exception == null)
        {
            FeedbackText.Text = e.OutputParameters["@WorkOrderID"].ToString();
        }
    }

Open in new window

BLL
    public static DataTable WorkOrderInsert(int WorkOrderID, string CustomerFirstName,
     string CustomerLastName, string CustomerPhone, string WorkDescription, 
     int DepartmentID, string DepartmentPhone, int LocationID, string LocationType, 
     string RPFirstName, string RPLastName, string RPEmail, string RPApprovalDate,
     string PMFirstName, string PMLastName, string PMEmail, string PMApprovalDate)
    {
        DataTable WorkOrderData = new DataTable();
        SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionAIMDB"].ConnectionString);

        //must check for null parameters
        if (CustomerFirstName == null) { CustomerFirstName = String.Empty; }
        if (CustomerLastName == null) { CustomerLastName = String.Empty; }
        if (CustomerPhone == null) { CustomerPhone = String.Empty; }
        if (WorkDescription == null) { WorkDescription = String.Empty; }
        if (DepartmentPhone == null) { DepartmentPhone = String.Empty; }
        if (LocationType == null) { LocationType = String.Empty; }
        if (RPFirstName == null) { RPFirstName = String.Empty; }
        if (RPLastName == null) { RPLastName = String.Empty; }
        if (RPEmail == null) { RPEmail = String.Empty; }
        if (RPApprovalDate == null) { RPApprovalDate = String.Empty; }
        if (PMFirstName == null) { PMFirstName = String.Empty; }
        if (PMLastName == null) { PMLastName = String.Empty; }
        if (PMEmail == null) { PMEmail = String.Empty; }
        if (PMApprovalDate == null) { PMApprovalDate = String.Empty; }


        try
        {
            SqlCommand cmd = new SqlCommand("WorkOrderInsert", connection);

            //create parameters
            //cmd.Parameters.AddWithValue("@WorkOrderID", WorkOrderID);
            cmd.Parameters.Add("@WorkOrderID", SqlDbType.Int);
            cmd.Parameters["@WorkOrderID"].Direction = ParameterDirection.Output;
            cmd.Parameters.AddWithValue("@CustomerFirstName", CustomerFirstName);
            cmd.Parameters.AddWithValue("@CustomerLastName", CustomerLastName);
            cmd.Parameters.AddWithValue("@CustomerPhone", CustomerPhone);
            cmd.Parameters.AddWithValue("@WorkDescription", WorkDescription);
            cmd.Parameters.AddWithValue("@DepartmentID", DepartmentID);
            cmd.Parameters.AddWithValue("@DepartmentPhone", DepartmentPhone);
            cmd.Parameters.AddWithValue("@LocationID", LocationID);
            cmd.Parameters.AddWithValue("@LocationType", LocationType);
            cmd.Parameters.AddWithValue("@RPFirstName", RPFirstName);
            cmd.Parameters.AddWithValue("@RPLastName", RPLastName);
            cmd.Parameters.AddWithValue("@RPEmail", RPEmail);
            cmd.Parameters.AddWithValue("@RPApprovalDate", RPApprovalDate);
            cmd.Parameters.AddWithValue("@PMFirstName", PMFirstName);
            cmd.Parameters.AddWithValue("@PMLastName", PMLastName);
            cmd.Parameters.AddWithValue("@PMEmail", PMEmail);
            cmd.Parameters.AddWithValue("@PMApprovalDate", PMApprovalDate);

            cmd.CommandType = CommandType.StoredProcedure;

            connection.Open();
            SqlDataAdapter adapter = new SqlDataAdapter(cmd);
            adapter.Fill(WorkOrderData);
            connection.Close();

        }
        catch
        {
            connection.Close();
        }
        return WorkOrderData;
    }

Open in new window

and finally the markup
    <asp:UpdatePanel ID="MainUpdatePanel" runat="server">
        <ContentTemplate>
            <div class="exampleWrapper">
                <div style="float: left; width: 600px">
                    <asp:Wizard ID="wzd" runat="Server" Width="100%" DisplaySideBar="False" BackColor="#F7F6F3"
                        BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px" Font-Names="Verdana"
                        Font-Size="0.8em" OnActiveStepChanged="wzd_ActiveStepChanged" ActiveStepIndex="3">
                        <HeaderStyle BackColor="#5D7B9D" BorderStyle="Solid" Font-Bold="True" Font-Size="0.9em"
                            ForeColor="White" HorizontalAlign="Left" />
                        <HeaderTemplate>
                            <table style="width: 100%" cellpadding="0" cellspacing="0">
                                <tr>
                                    <td class="wizardTitle">
                                        <%= wzd.ActiveStep.Title%>
                                    </td>
                                    <td>
                                        <table style="width: 100%; border-collapse: collapse;">
                                            <tr>
                                                <td style="text-align: right">
                                                    <span class="wizardProgress">Steps:</span>
                                                </td>
                                                <asp:Repeater ID="SideBarList" runat="server">
                                                    <ItemTemplate>
                                                        <td class="stepBreak">
                                                            &nbsp;
                                                        </td>
                                                        <td class="<%# GetClassForWizardStep(Container.DataItem) %>" title="<%# DataBinder.Eval(Container, "DataItem.Name")%>">
                                                            <%# wzd.WizardSteps.IndexOf(Container.DataItem as WizardStep) + 1 %>
                                                        </td>
                                                    </ItemTemplate>
                                                </asp:Repeater>
                                            </tr>
                                        </table>
                                    </td>
                                </tr>
                            </table>
                        </HeaderTemplate>
                        <NavigationButtonStyle BackColor="#FFFBFF" BorderColor="#CCCCCC" BorderStyle="Solid"
                            BorderWidth="1px" Font-Names="Verdana" Font-Size="0.8em" ForeColor="#284775" />
                        <SideBarButtonStyle BorderWidth="0px" Font-Names="Verdana" ForeColor="White" />
                        <SideBarStyle BackColor="#7C6F57" BorderWidth="0px" Font-Size="0.9em" VerticalAlign="Top" />
                        <SideBarTemplate>
                        </SideBarTemplate>
                        <StepStyle BorderWidth="0px" ForeColor="#5D7B9D" />
                        <WizardSteps>
                            <asp:WizardStep runat="server">
                                <div class="stepWrapper">
                                    <ucUserInfo:UserInfo ID="userinfoControl" runat="server" />
                                </div>
                            </asp:WizardStep>
                            <asp:WizardStep runat="server">
                                <div class="stepWrapper">
                                    <ucWorkOrder:WorkOrder ID="workorderControl" runat="server" />
                                </div>
                            </asp:WizardStep>
                            <asp:WizardStep runat="server">
                                <div class="stepWrapper">
                                    <ucApprovals:Approvals ID="approvalsControl" runat="server" />
                                </div>
                            </asp:WizardStep>
                            <asp:WizardStep runat="server" StepType="Complete">
                                <div class="stepWrapper">
                                    <div align="center">
                                        <asp:ObjectDataSource ID="WorkOrderDataSource" runat="server" InsertMethod="WorkOrderInsert"
                                            TypeName="WorkOrderBLL" OnInserted="WorkOrderDataSource_Inserted">
                                            <InsertParameters>
                                                <asp:Parameter Direction="Output" Name="WorkOrderID" Type="Int32" />
                                                <asp:ControlParameter ControlID="userInfoControl" Name="CustomerFirstName" PropertyName="CustomerFirstName"
                                                    Direction="Input" Type="String" />
                                                <asp:ControlParameter ControlID="userInfoControl" Name="CustomerLastName" PropertyName="CustomerLastName"
                                                    Direction="Input" Type="String" />
                                                <asp:ControlParameter ControlID="userInfoControl" Name="CustomerPhone" PropertyName="CustomerPhone"
                                                    Direction="Input" Type="String" />
                                                <asp:ControlParameter ControlID="workorderControl" Name="WorkDescription" PropertyName="WorkDescription"
                                                    Direction="Input" Type="String" />
                                                <asp:ControlParameter ControlID="workorderControl" Name="DepartmentID" PropertyName="Department"
                                                    Direction="Input" Type="Int32" />
                                                <asp:ControlParameter ControlID="workorderControl" Name="DepartmentPhone" PropertyName="DepartmentPhone"
                                                    Direction="Input" Type="String" />
                                                <asp:ControlParameter ControlID="workorderControl" Name="LocationID" PropertyName="Address"
                                                    Direction="Input" Type="Int32" />
                                                <asp:ControlParameter ControlID="workorderControl" Name="LocationType" PropertyName="LocationType"
                                                    Direction="Input" Type="String" />
                                                <asp:ControlParameter ControlID="approvalsControl" Name="RPFirstName" PropertyName="RPFirstName"
                                                    Direction="Input" Type="String" />
                                                <asp:ControlParameter ControlID="approvalsControl" Name="RPLastName" PropertyName="RPLastName"
                                                    Direction="Input" Type="String" />
                                                <asp:ControlParameter ControlID="approvalsControl" Name="RPEmail" PropertyName="RPEmail"
                                                    Direction="Input" Type="String" />
                                                <asp:ControlParameter ControlID="approvalsControl" Name="RPApprovalDate" PropertyName="RPApprovalDate"
                                                    Direction="Input" Type="String" />
                                                <asp:ControlParameter ControlID="approvalsControl" Name="PMFirstName" PropertyName="PMFirstName"
                                                    Direction="Input" Type="String" />
                                                <asp:ControlParameter ControlID="approvalsControl" Name="PMLastName" PropertyName="PMLastName"
                                                    Direction="Input" Type="String" />
                                                <asp:ControlParameter ControlID="approvalsControl" Name="PMEmail" PropertyName="PMEmail"
                                                    Direction="Input" Type="String" />
                                                <asp:ControlParameter ControlID="approvalsControl" Name="PMApprovalDate" PropertyName="PMApprovalDate"
                                                    Direction="Input" Type="String" />
                                            </InsertParameters>
                                            <SelectParameters>
                                                <asp:Parameter Name="WorkOrderID" Type="Int32" />
                                                <asp:Parameter Name="CustomerFirstName" Type="String" />
                                                <asp:Parameter Name="CustomerLastName" Type="String" />
                                                <asp:Parameter Name="CustomerPhone" Type="String" />
                                                <asp:Parameter Name="WorkDescription" Type="String" />
                                                <asp:Parameter Name="DepartmentID" Type="Int32" />
                                                <asp:Parameter Name="DepartmentPhone" Type="String" />
                                                <asp:Parameter Name="LocationID" Type="Int32" />
                                                <asp:Parameter Name="LocationType" Type="String" />
                                                <asp:Parameter Name="RPFirstName" Type="String" />
                                                <asp:Parameter Name="RPLastName" Type="String" />
                                                <asp:Parameter Name="RPEmail" Type="String" />
                                                <asp:Parameter Name="RPApprovalDate" Type="String" />
                                                <asp:Parameter Name="PMFirstName" Type="String" />
                                                <asp:Parameter Name="PMLastName" Type="String" />
                                                <asp:Parameter Name="PMEmail" Type="String" />
                                                <asp:Parameter Name="PMApprovalDate" Type="String" />
                                            </SelectParameters>
                                        </asp:ObjectDataSource>
                                        <asp:Button ID="SaveButton" runat="server" Text="Save" OnClick="SaveButton_Click">
                                        </asp:Button></div>
                                      
                                </div>
                            </asp:WizardStep>
                        </WizardSteps>
                    </asp:Wizard>
                </div>
                <div class="previewWrapper">
                    <ucPreview:Preview ID="previewControl" runat="server" />
                </div>
            </div>
              <asp:Label ID="FeedbackText" runat="server"></asp:Label>
        </ContentTemplate>
    </asp:UpdatePanel>

Open in new window

and for good measure, my stored procedure
USE [AIM]
GO
/****** Object:  StoredProcedure [dbo].[WorkOrderInsert]    Script Date: 03/14/2011 12:28:07 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:		Martin Jordan
-- Create date: 3/9/2011
-- Description:	Insert WorkOrder related information
-- =============================================
ALTER PROCEDURE [dbo].[WorkOrderInsert]
	-- Add the parameters for the stored procedure here
	(   
	   @WorkOrderID int OUTPUT,
       @CustomerFirstName nvarchar(25),
       @CustomerLastName nvarchar(50),
       @CustomerPhone nvarchar(20),
       @WorkDescription nvarchar(4000),
       @DepartmentID int,
       @DepartmentPhone nvarchar(20),
       @LocationID int,
       @LocationType nvarchar(20),
       @RPFirstName nvarchar(25),
       @RPLastName nvarchar(50),
       @RPEmail nvarchar(50),
       @RPApprovalDate date,
       @PMFirstName nvarchar(25),
       @PMLastName nvarchar(50),
       @PMEmail nvarchar(50),
       @PMApprovalDate date
       
     )	
AS
BEGIN TRANSACTION
	-- SET NOCOUNT ON added to prevent extra result sets from
	-- interfering with SELECT statements.
	SET NOCOUNT ON;

    -- select
		
	-- insert
	INSERT INTO [FAC_WorkOrder] 
	   ([CustomerFirstName],
       [CustomerLastName],
       [CustomerPhone],
       [WorkDescription],
       [DepartmentID],
       [DepartmentPhone],
       [LocationID],
       [LocationType],
       [RPFirstName],
       [RPLastName],
       [RPEmail],
       [RPApprovalDate],
       [PMFirstName],
       [PMLastName],
       [PMEmail],
       [PMApprovalDate])
     VALUES 
       (@CustomerFirstName,
       @CustomerLastName,
       @CustomerPhone,
       @WorkDescription,
       @DepartmentID,
       @DepartmentPhone,
       @LocationID,
       @LocationType,
       @RPFirstName,
       @RPLastName,
       @RPEmail,
       @RPApprovalDate,
       @PMFirstName,
       @PMLastName,
       @PMEmail,
       @PMApprovalDate)
	SET @WorkOrderID = SCOPE_IDENTITY()
	SELECT SCOPE_IDENTITY()
	
	IF @@ERROR <> 0
 BEGIN
    -- Rollback the transaction
    ROLLBACK

    -- Raise an error and return
    RAISERROR ('Error in inserting into FAC_Department.', 16, 1)
    RETURN
 END

COMMIT

Open in new window

been stuck on this for hours, it feels like I'm missing something very obvious and simple

Thank you for your consideration
0
Comment
Question by:dantcho
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
7 Comments
 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 35130097
in the procedure , you need 1 more line:

SET  @WorkOrderID = SCOPE_IDENTITY()
0
 

Author Comment

by:dantcho
ID: 35130244
Hmm? That's already in there, did I put it in the wrong place?
0
 
LVL 2

Expert Comment

by:enkor
ID: 35130334
Have you declared the parameter @WorkOrderID?
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:dantcho
ID: 35130521
yes, i define it in the SP here:          @WorkOrderID int OUTPUT,

in the BLL here:   cmd.Parameters.Add("@WorkOrderID", SqlDbType.Int);
            cmd.Parameters["@WorkOrderID"].Direction = ParameterDirection.Output;

in the markup here: <asp:Parameter Direction="Output" Name="WorkOrderID" Type="Int32" />
0
 

Accepted Solution

by:
dantcho earned 0 total points
ID: 35131774
Going to just switch to using typed datasets instead of writing the BLL and DAL myself, problem goes away when I do so.
0
 

Author Comment

by:dantcho
ID: 35131801
nm
0
 

Author Closing Comment

by:dantcho
ID: 35170987
not doing it this way.. have too little time to wait for someone to pore over my code and suggest where something might be changed.

this is a time sensitive project
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …
In this video you will find out how to export Office 365 mailboxes using the built in eDiscovery tool. Bear in mind that although this method might be useful in some cases, using PST files as Office 365 backup is troublesome in a long run (more on t…
Suggested Courses
Course of the Month14 days, 16 hours left to enroll

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question