DBLayer wizard ，一个国外写的数据库访问和实体映射的自动生成工具

Introduction

This is the first version of DBLayer Wizard. It's a tool to generate the Data Layer in N-tier architectures in CS file format. This helps developers to save their time from writing the same code every time they work in a new project. We tried to provide the best ways in coding and data access patterns to satisfy speed, ease of use, reliability, robustness, and portability.
As we stated above, our main goal for this tool was to save developer time in N-tier applications using .NET languages. We also tried very hard to cover many methods for data access; for that we studied many data layer frameworks, so we provide here many ways and options for database operations.

Features

Creates a class that is called

DB

which includes common data access functionality in any application like executing in-line SQL, executing a Stored Procedure and executing a transaction.
Creates a class for each table that performs the most common operations like select by primary key, select by foreign key, select all records, insert, update and delete.
Creates a class to execute Stored Procedures. For each Stored Procedure, gives the ability to return (

DataSet

,

DataReader

, or a return value).
Generated code is based on templates so developer can customize with save and open customized templates.
All generated CS files saved to folder that you choose.

Using the DataLayer wizard code generator

Define SQL Server information (server name, authentication method, database name).
Select tables for which you want to generate a .NET class for.
Select Stored Procedures for which you want to generate methods for.
Select the return data types for tables [

DataSet

or

DataReader

or both] and for Stored Procedures.
Define the template which will be used to generate the .NET code.
Define the folder which the code will be generated in.

Using the generated code from your application

Here we will see some examples of how to use the generated code. We are working on the NorthWind as the sample DB. This should act as a guide for the class developer.
How to execute in-line SQL:

//DBlayer is the namespace of generated code
//all classes and method are static method
//Execute Common method form the base class
DataSet ds=DBLayer.DB.Execute("SELECT * FROM Customers");
//Execute Scalar (Avg,Count,Sum,..)
object result=DBLayer.DB.ExecuteScalar("SELECT COUNT(*) FROM Customers");
//Execute Non Query like (Insert,Update,Delete)
int AffectedRows=DBLayer.DB.ExecuteNonQuery(insert sql statment);

As you see above, all methods are

static

and the base namespace is

DBlayer

.

How to insert into a table: As you will see, in the insert operation, we have three different ways for inserting.

//Insert
bool result= DBLayer.DBTableShippers.Insert("New Tech","123456");
//Insert DataRow
DataRow row=DBLayer.DBTableShippers.GetSchema();
row["CompanyName"]="New Tech";
row["Phone"]="123456";
bool result= DBLayer.DBTableShippers.Insert(row);
//Insert DataTable
DataTable table=DBLayer.DBTableShippers.GetSchemaTable();
DataRow row1=table.NewRow();
row1["CompanyName"]="New Tech";
row1["Phone"]="123456";
table.Rows.Add(row1);

DataRow row2=table.NewRow();
row2["CompanyName"]="New Tech";
row2["Phone"]="123456";
table.Rows.Add(row2);

bool result= DBLayer.DBTableShippers.Insert(table);

How to update data in a table:

//Update
bool result=DBLayer.DBTableShippers.Update(1,"Home","12365");
//Update DataRow
DataRow row=DBLayer.DBTableShippers.GetSchema();
row["ShipperID"]=1;
row["CompanyName"]="New Tech";
row["Phone"]="123456";
bool result=DBLayer.DBTableShippers.Update(row);

//Update Data Table
DataTable table=DBLayer.DBTableShippers.GetSchemaTable();
DataRow row1=table.NewRow();
row1["ShipperID"]=1;
row1["CompanyName"]="New Tech";
row1["Phone"]="123456";
table.Rows.Add(row1);

DataRow row2=table.NewRow();
row2["ShipperID"]=2;
row2["CompanyName"]="Ok";
row2["Phone"]="123456";
table.Rows.Add(row2);

bool result=DBLayer.DBTableShippers.Update(table);

How to delete data from a table:

//Delete All the Rows
int DeletedRows=DBLayer.DBTableOrders.DeleteAll();

//Delete By PK
bool result=DBLayer.DBTableOrders.DeleteByPK(int.Parse(txtPK.Text));

//Delete By FK
bool result=DBLayer.DBTableOrders.DeleteByFK(txtFK.Text);

How to select from a table:

//Select All Rows
DataSet ds= DBLayer.DBTableOrders.SelectAll();
//Select By Primary Key
DataSet ds= DBLayer.DBTableOrders.SelectByPK(int.Parse(txtPKds.Text));
//Select By Foreign Key
DataSet ds= DBLayer.DBTableOrders.SelectByFK(txtFKds.Text);

How to execute a transaction:

//the method takes array of strings which
//is the SQL statements of the transaction
bool result=DBLayer.DB.ExecuteTransaction(txtSQL.Lines);

相关详细说明和源代码请访问http://www.codeproject.com/cs/database/DBLayer_Wizard.asp