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  1. 1. ® Library Project As Implemented By: Alan P. Weir 860-649-7603
  2. 2. ® uses a progressive Library Project consisting of four distinct phases throughout the curriculum. The library project is an intensive, hands-on, project where knowledge and experience is gained in the key components necessary to roll out Windows, ASP.Net, and WCF applications. It encompasses: • Developing solutions for diverse programming scenarios in C# • Developing queries using MS SQL Server 2008 Transact-SQL (T-SQL) • Using C#, LINQ and ADO.NET to define and implement secure middle-tier components • Creating and deploying XML Web Services using ASP.NET and Windows Communication Foundation (WCF) • Consuming Web Services from Windows forms and ASP.NET web applications • Creating Deployment projects for .NET applications using Microsoft’s MSI packages
  3. 3. Phase I— Create a Windows front end User A database has been created to support the principal functions of a lending library’s day- today operations: adding new members (adult and juvenile) and checking books in and out. An assembly has been created that contains classes and interfaces that provide access to the database for these functions. What is needed is a Windows Forms-based front- end application that will provide a librarian with a visual interface through which he or she may perform the desired functions.
  4. 4. Code Showing the Add Juvenile Form public partial class frmStart : Form { #region Add Juvenile /// <summary> /// Tool Strip Menu - Add Juvenile Member /// Button Click Add Juvenile /// </summary> /// <param name=”sender”></param> /// <param name=”e”></param> private void addJuvenileToolStripMenuItem_Click(object sender, EventArgs e) { UtilityMethods ja = new UtilityMethods(); ja.frmJuvenileAddShow(); } private void btnAddJuvenile_Click(object sender, EventArgs e) { UtilityMethods ja = new UtilityMethods(); ja.frmJuvenileAddShow(); } #endregion //Juvenile add /// <summary>Utility Methods</summary> public class UtilityMethods { #region Show Forms /// <summary>Show Juvenile Add</summary> public void frmJuvenileAddShow() { frmAddJuvenile frm = new frmAddJuvenile(); frm.Show(); } }
  5. 5. Add Juvenile Member—Preprocessing
  6. 6. Juvenile Member Added
  7. 7. Add Juvenile Member Code #region Add Juvenile member Add Button Click if (response == DialogResult.OK) /// <summary>Add Juvenile Member Add Button { Click</summary> txtAdultID.Text = string.Empty; /// <param name=”sender”></param> txtFirstName.Text = string.Empty; /// <param name=”e”></param> txtMiddleInitial.Text = string.Empty; private void btnAddJuvenile_Click(object sender, txtLastName.Text = string.Empty; EventArgs e) txtAdultFirstName.Text = string.Empty; { txtAdultLastName.Text = string.Empty; try txtState.Text = string.Empty; { txtStreet.Text = string.Empty; //Create a new Instance of Jevenile member txtCity.Text = string.Empty; //and populate some of the fields with the txtZipCode.Text = string.Empty; information provided in the text boxes txtPhone.Text = string.Empty; } var myJevMember = new Member(); else { myJevMember.firstname = this.Close(); txtFirstName.Text; } if (txtMiddleInitial.Text == null) } { catch (LibraryException ex) txtMiddleInitial.Text = “ “; { } switch (ex.LibraryErrorCode) myJevMember.middleinitial = { tMiddleInitial.Text[0]; case ErrorCode.MissingAdultMember: myJevMember.lastname = txtLastName.Text; tssMessage.Text =”Missing myJevMember.adult_member_no = mId; AdultMember Failure”; myJevMember.birth_date = break; dateTimePicker1.MinDate; case ErrorCode.NoSuchMember: tssMessage.Text = “Adult Member BusinessLayer bl = new BusinessLayer(); Not Found”; bl.AddJuvenileMember(myJevMember); break; case ErrorCode.None: DialogResult response = tssMessage.Text = ex.Message; MessageBox.Show(string.Format(“{0} ‘s new break; member number is {1}”, default: tssMessage.Text = myJevMember.firstname, ex.Message; myJevMember.member_no.ToString()), break; “Juvenile Added”, } MessageBoxButtons.OKCancel); } catch (Exception ex) { tssMessage.Text = ex.Message; } } #endregion Add Juvenile member Add Button Click
  8. 8. Phase II— Design and Create the Business and Data Requirements: • Develop code that is easily maintainable. • Provide adequate error handling. • Use database-programming techniques that provide maximum programming flexibility and control while minimizing resource utilization. • Work with your instructor who will act as the project DBA for any required SQL help.
  9. 9. Required Functionality: In Phase 1 of this ongoing project, you Focus your efforts on the following: were provided with an assembly that • Add Adult: Rows are added to both the encapsulated all the data access logic for member table and the adult table. your application. The assembly in Phase 1 • Add Juvenile: Verification that the employed ADO.NET to provide access to sponsoring adult member’s record exists the library database. It did not, however, use (and is unexpired) must be performed. any stored procedures, which could have made database operations more efficient. In • The juvenile’s age should be verified that Phase 2, you are to design and implement it is an acceptable age of a juvenile. Rows your own business and data access tiers. Use are added to both the member table and stored procedures which must be commented the juvenile table. thoroughly and your code should not contain • Checkout item: Verification that item any SQL statements. exists and is not already on loan must be performed. You were also provided an assembly that • Verification that item is loanable must be contained business entity classes needed performed. Row is added to loan table. for the project (e.g., Item, ItemsDataSet, Update copy table’s on_loan field to ‘Y’. Member, etc.). You must not use either of the assemblies that were provided to you in your • Checkin item: Verify that the item exists Phase 2 project. You must implement the and is on loan. Delete row from loan table. business entity classes yourself. You are not Add row to loanhist table. Update copy obligated to use the same interface that the table’s on_loan field to ‘N’. data access object in the assembly provided The data access tier has to be stateless. in Phase 1 employed. If you wish to redesign Stateless means that the data access class this interface, you may do so, provided that must not maintain variable state between all required functionality is supported. method calls. Variable state should be kept to local variables. In Phase 1 of this ongoing project, verification that an item presented for Remember to treat operations that involve checkout is loanable was not a requirement. multiple tables as transactions, and In this phase, you must perform that validate against null inputs in each relevant verification and prevent an item that is not procedure. loanable from being checked out.
  10. 10. Add Juvenile Stored Procedure USE [library] BEGIN GO RAISERROR(‘AdultMember Not Found’, 11, 2) SET ANSI_NULLS ON RETURN GO SET NOCOUNT ON; SET QUOTED_IDENTIFIER ON GO BEGIN TRANSACTION INSERT dbo.MEMBER IF OBJECT_ID(‘[dbo].[uspJuvenileMemberI ( nsert]’) IS NOT NULL Lastname DROP PROCEDURE ,Firstname [dbo].[uspJuvenileMemberInsert] ,Middleinitial GO ) VALUES ( CREATE PROCEDURE @lastname [dbo].[uspJuvenileMemberInsert] ,@firstname @member_no smallint OUTPUT ,@middleinitial ,@lastname varchar (15) ) ,@firstname varchar (15) IF @@error <> 0 ,@middleinitial char (1) = NULL BEGIN ,@adultmemberno smallint ROLLBACK TRAN ,@birthdate datetime RETURN AS END BEGIN SET @member_no = Scope_Identity() IF INSERT dbo.juvenile( @lastname IS NULL OR member_no @firstname IS NULL OR ,adult_member_no @adultmemberno IS NULL OR ,birth_date @birthdate IS NULL ) BEGIN VALUES ( @member_no RAISERROR(‘You Must provide ,@adultmemberno Member Info’,11,1) ,@birthdate RETURN ) END IF @@error <> 0 BEGIN IF NOT EXISTS ROLLBACK TRAN (SELECT * FROM WHERE RETURN member_no = @adultmemberno) END COMMIT TRANSACTION END
  11. 11. Retrieve Books on Loan By Member— Load a LINQ Dataset Business Layer Code /// <summary>Get Books on loan by members</summary> /// <param name=”myMember”></param> /// <returns></returns> public AW.LibraryEntitiesLINQ.ItemsDSLINQ getItems(short myMember) { //Create a Library data access object DataAccessLINQcode dalc = new DataAccessLINQcode(); return dalc.getItems(myMember); } Data Access Layer /// <summary>Data Access Class </summary> #region Data Access Class public class DataAccessLINQcode { /// <summary>Get The Items Data Set Info</summary> /// <param name=”member_no”></param> /// <returns>Books on Loan for this Member</returns> public ItemsDSLINQ getItems(short member_no) { try { var itemsDSL = new ItemsDSLINQ(); using (ItemsTALINQ ita = new ItemsTALINQ()) { ita.Fill(itemsDSL.ItemsLINQ, member_no); } return itemsDSL; } catch (SqlException ex) { if (ex.State == 1) { throw new LbraryException(ex.ToString(), ErrorCode.MissingAdultMember, ex); } else } throw new LibraryException(ex.ToString(), ErrorCode.GenericException, ex); } } }
  12. 12. Phase III— Web Application (ADO.NET, ASP.NET, LINQ, AJAX Controls) Requirements: Create a web application that supports all the functionality required for Phase I and II of the Library project. Additional requirements: you must add all necessary records for the • When displaying an adult’s information, new ISBN and a new copy number 1 for the application should detect if the card is that ISBN. expired and give the librarian a chance to • On the Member Information page the renew the card. Librarian must be able to design must be altered to use two AJAX choose whether or not to renew the card. controls, the Update Panel control and The renewal date is today plus one year. the Update progress control. The Update Members cannot check out books if the Panel control will need to be placed on card is expired. the form and the grid view that displays • When dealing with juveniles, the checked out items will then be placed application should detect if the juvenile within the Update Panel control. The check is 18 years old or older and convert in functionality will reside within the panel the member to an adult (row deleted and when an item is checked in a postback in the juvenile table, row added to the for the entire page should not be triggered. adult table). This operation is not at the Only the information within the Update discretion of the librarian; i.e. the upgrade Panel should be updated. Additionally, the must take place automatically and the Update Progress control should display librarian must be notified that the upgrade the progress of the check in action. (If your has taken place. project does not currently have a page that displays the member’s information, • Overdue books, shown in any display, must with a grid that displays the items that are be highlighted. checked out, one will need to be added. • The librarian must be able to enter a new The librarian should be able to select a row book into the database. If the ISBN already and click a check in button to check the exists in the database, all that is needed is item back into the library). to add a record for a new copy number. If • Use hyperlinks to navigate between pages. the ISBN does not yet exist in the database,
  13. 13. Add Member—both Adult and Juvenile— using LINQ–Data Access Code ///<summary>Data Access Class </summary> #region Data Access Class #region Data Access Class public class DataAccessLINQcode public class DataAccessLINQcode ,myJuvenileMember.adult_member_no #region Add Member - Adult and Juvenile ,myJuvenileMember.birth_date); /// <summary>Add Member</summary> public AW.LibraryEntitiesLINQ.Member if (tempID.HasValue) addMember(Member myMember) { { myJuvenileMember.member_no = var ldc = new (short)tempID AW_LibraryObjectModelDataContext(); } short? tempID = myMember.member_no else ldc.AdultInsert(ref tempID { ,myMember.lastname throw new ,myMember.firstname LibraryException(ErrorCode.MemberNumberCame ,myMember.middleinitial BackNull, “Member No Came Back Null”); ,myMember.street } , return myJuvenileMember; ,myMember.state }// end Method Add uvenile , #endregion //Add Member - Adult and Juvenile ,myMember.phone_no); if (tempID.HasValue) { myMember.member_no = (short)tempID; } else { throw new LibraryException (ErrorCode.MemberNumberCameBackNull, “Member No Came Back Null”); } return myMember; } //method add Adult /// <summary>Add Juv’y Member</summary> public AW.LibraryEntitiesLINQ.Member addMemberJev(Member myJuvenileMember) { var ldc = new AW_LibraryObjectModelDataContext(); short? tempID = myJuvenileMember.member_no; ldc.JuvenileInsert(ref tempID ,myJuvenileMember.firstname ,myJuvenileMember.lastname ,myJuvenileMember.middleinitial
  14. 14. Retrieve Member Information— Highlighted Over Due Book(s) protected void // update the CheckIn arguments booksGridView_RowDataBound(object sender, Int32 isbn = (Int32)row[“isbn”]; GridViewRowEventArgs e) Int16 copyNo = (Int16)row[“copy_no”]; { LinkButton cmdCheckIn = if (e.Row.RowType != (LinkButton)e.Row.FindControl(“cmdCheckIn”); DataControlRowType.DataRow) return; cmdCheckIn.CommandArgument = try String.Format(“{0}|{1}”, row[“isbn”], { row[“copy_no”]); // 1|3 DataRowView row = e.Row.DataItem as } DataRowView; catch BusinessLayer bl = new BusinessLayer(); { If (bl.IsOverDue((DateTime)row[“due_date”])) tssMessage.ForeColor = Color.Red; { tssMessage.Text = (“An unexpected error occured”); e.Row.ForeColor = System.Drawing.Color.Red; } tssMessage.ForeColor = } system.Drawing.Color.Red; tssMessageExpired.Visible = true; tssMessageExpired.Text = “Book is Over Due”; } }
  15. 15. Phase IV— WCF Service Our library system rollout has been very successful. As the potential to acquire libraries and creating partnerships with others increases, we see the need to take the library system to the next level—allow interoperability with other systems. With the success on the library system thus far, we are tasking you to provide a proof of concept implementation that utilizes Web services. Use Windows Communication Foundation (WCF) to implement the service. To provide the proof of concept system, you must implement a system that uses Web services to offer access to the business layer. Due to the possibility of utilizing the service between our own systems and those of our partners, security must be employed. Use your existing presentation front-end for the client layer. Requirements: • Create a WCF service that calls into the business layer. Do not re-write the business layer. Simply have the service call into the layer. • Update the presentation (UI) layer to call the WCF service. This will require changing some namespaces and references to accommodate the service. • The WCF Service must be implemented with or support the following: – WCF Service Library project – WCF Service Website – Uses the WCF Service Library project – Uses WsHttpBinding – Authentication using ASP.NET membership—must be a member of the LibraryPartner role – Authorization using ASP.NET roles—LibraryPartner role – Use PrinciplePermission to secure service operations – Use DataContracts for entities – Support previous project functionality
  16. 16. WEB Service— Interface and Contracts namespace AWPhase4ServiceLibrary /// <summary>Retrieve book Info</summary> { /// <param name=”ISBN”></param> <param /// <summary>WEB Service</summary> name=”Copy_no”></param> [ServiceContract(Namespace = /// <returns>Book Info</returns> “”)] [OperationContract] public interface IAWPhase4Service [FaultContract(typeof(LibraryFaultErrors))] { Item GetItemInformation(int ISBN, short Copy_no); /// <summary>Contract</summary> /// <param name=”ISBN”></param> /// <summary>Add Book</summary> /// <param name=”Copy_no”></param> /// <param name=”myTCIView”></param> [OperationContract] /// <returns></returns> [FaultContract(typeof(LibraryFaultErrors))] [OperationContract] void CheckBookIn(int ISBN, short Copy_no); [FaultContract(typeof(LibraryFaultErrors))] AW.LibraryEntitiesLINQ.TCIViews /// <summary>Retrieve Member Info</summary> addBook(TCIViews myTCIView); /// <param name=”memberID”></param> // <param name=”rv”></param> /// <summary>Check book out</summary> /// <returns></returns> /// <param name=”memberID”></param> [OperationContract] /// <param name=”itemISBN”></param> [FaultContract(typeof(LibraryFaultErrors))] /// <param name=”itemCopy”></param> Member getMember(short memberID, ref int rv); [FaultContract(typeof(LibraryFaultErrors))] [OperationContract] /// <summary>Add Adult Member</summary> void CheckOutItem(short memberID, int itemISBN, /// <param name=”myMember”></param> short itemCopy); [OperationContract] } [FaultContract(typeof(LibraryFaultErrors))] } Member addMember(Member myMember); /// <summary>Add Juvenile Member </summary> /// <param name=”myJuvMember”></param> [OperationContract] [FaultContract(typeof(LibraryFaultErrors))] Juvenile addJuvenileMember(Juvenile myJuvMember); /// <summary>Get Copy No for Book Add</summary> /// <param name=”ISBN”></param> /// <returns>Copy Number</returns> [OperationContract] [FaultContract(typeof(LibraryFaultErrors))] CopyNumber getCopyNumber(int ISBN);
  17. 17. Web Service (typical)— Phase IV Visual Studio Solution namespace AWPhase4ServiceLibrary { /// <summary>Web Service AWPhase4</summary> public class AWPhase4Service : IAWPhase4Service { /// <summary>Check Book In</summary> [PrincipalPermission(SecurityAction.Demand, Role = “LibraryPartner”)] public void CheckBookIn(int ISBN, short Copy_no) { try { BusinessLayer bl = new BusinessLayer(); bl.CheckInItem(ISBN, Copy_no); } catch (LibraryException ex) { var lfe = new LibraryFaultErrors(); lfe.Message = ex.Message; lfe.LibraryErrorCode = ex.LibraryErrorCode; throw new FaultException<LibraryFaultErrors>(lfe, lfe.Message); } } /// <summary>Check Book Out</summary> [PrincipalPermission(SecurityAction.Demand, Role = “LibraryPartner”)] public void CheckOutItem(short memberID, int ISBN, short copy_no) { try { var bl = new BusinessLayer(); bl.CheckOutItem(memberID, ISBN, copy_no); } catch (LibraryException ex) { var lfe = new LibraryFaultErrors(); lfe.Message = ex.Message; lfe.LibraryErrorCode = ex.LibraryErrorCode; throw new FaultException<LibraryFaultErrors>(lfe, lfe.Message); } }