基于微软企业库的分层代码框架

 

微软stringradiobuttonnullexceptiondataset

一般我们都采用分层架构，

先思考业务，要解决什么样的业务问题，再去思考技术实现。

l 正向思维：

界面(UI)—>业务逻辑（BLL）—>数据逻辑（DAL）—>数据实体（Model）—>数据存储（Db）

l 反向思维：

数据存储（Db）—>数据实体（Model）—>数据逻辑（DAL）—>业务逻辑（BLL）—>界面(UI)。

从数据库推导到界面，从界面推导到数据库。搞清楚类之间的关系。数据之间传递关系。

界面(UI):由控件组成。系统与用户交互的窗口。

业务逻辑（BLL）：封装业务处理功能。对象的组合，应用。

数据逻辑（DAL）：对数据的操作（算法）。（增删改查的多样性），对象函数，方法。

数据实体（Model）：操作的数据结构。对象属性

数据存储（Db）：数据的存储持久化。（表）。

体会：程序=数据结构+算法，程序=类对象+类对象之间的关系。

我们的很多项目都是基于微软企业库5.0搭建的。具体说一下我们在企业级项目中是怎么应用的。下面是架构图：

1.基于微软企业库的工具类

封装了微软企业库访问数据库常用的最基本的操作。

2.Model层（数据库表映射）

封装了很多属性。对应数据库表c_hbbb_code

代码：

[c-sharp] view plaincopy

odeusing System;
amespace SFS.Entity.Model

// summary
// c_hbbb_code
// summary
   [Serializable]
ublic class c_hbbb_code
   {
ublic c_hbbb_code()
       { }
rivate int _CodeID = 0;
// <summary>
//
// </summary>
ublic int CodeID
       {
et { return _CodeID; }
et { _CodeID = value; }
       }
rivate string _CODENO = "";
// <summary>
//
// </summary>
ublic string CODENO
       {
et { return _CODENO; }
et { _CODENO = value; }
       }
rivate string _CODENAME = "";
// <summary>
//
// </summary>
ublic string CODENAME
       {
et { return _CODENAME; }
et { _CODENAME = value; }
       }
rivate string _ISMX = "";
// <summary>
//
// </summary>
ublic string ISMX
       {
et { return _ISMX; }
et { _ISMX = value; }
       }
rivate string _ParentCodeNO = "";
// <summary>
//
// </summary>
ublic string ParentCodeNO
       {
et { return _ParentCodeNO; }
et { _ParentCodeNO = value; }
       }
rivate string _ZT = "";
// <summary>
//
// </summary>
ublic string ZT
       {
et { return _ZT; }
et { _ZT = value; }
       }
   }

3.Dal层（封装数据库操作增，删，改，查）

[c-sharp] view plaincopy

odenamespace SFS.DAL

ublic class c_hbbb_code
   {


rivate SFS.Utility.DbUtility.DbHelper db = null;

// <summary>
// 是否存在该记录
// </summary>
ublic bool Exists(string CodeID)
       {

tring strSql = "SELECT count(1) FROM c_hbbb_code WHERE  CodeID=@CodeID ";
           DbCommand dbCommand = db.GetSqlStringCommand(strSql);
           db.AddInParameter(dbCommand, "CodeID", DbType.String, CodeID);

nt result;
bject obj = db.ExecuteScalar(dbCommand);
nt.TryParse(obj.ToString(), out result);
f (result == 1)
           {
eturn true;
           }
lse
           {
eturn false;
           }
       }


// <summary>
//  增加一条数据
// </summary>
ublic int Add(SFS.Entity.Model.c_hbbb_code model)
       {
eturn Add(model, null);
       }

// <summary>
//  增加一条数据
// </summary>
ublic int Add(SFS.Entity.Model.c_hbbb_code model, DbTransaction transaction)
       {
ry
           {
tring strSql = "INSERT INTO c_hbbb_code(CodeID,CODENO,CODENAME,ISMX,ParentCodeNO,ZT)VALUES(@CodeID,@CODENO,@CODENAME,@ISMX,@ParentCodeNO,@ZT)";
               DbCommand dbCommand = db.GetSqlStringCommand(strSql);
               db.AddInParameter(dbCommand, "CodeID", DbType.Int32, model.CodeID);
               db.AddInParameter(dbCommand, "CODENO", DbType.String, model.CODENO);
               db.AddInParameter(dbCommand, "CODENAME", DbType.String, model.CODENAME);
               db.AddInParameter(dbCommand, "ISMX", DbType.String, model.ISMX);
               db.AddInParameter(dbCommand, "ParentCodeNO", DbType.String, model.ParentCodeNO);
               db.AddInParameter(dbCommand, "ZT", DbType.String, model.ZT);

f (transaction == null)
               {
eturn db.ExecuteNonQuery(dbCommand);
               }
lse
               {
eturn db.ExecuteNonQuery(dbCommand, transaction);
               }
           }
atch (AddException addex)
           {
               addex.DeveloperMessage = "添加c_hbbb_code记录失败！" + addex.Message + "在" + this.ToString() + ".Add(SFS.Entity.Model.c_hbbb_code model)中";
               addex.UserMessage = "添加c_hbbb_code记录失败！";
hrow addex;
           }
       }

// <summary>
//  更新一条数据
// </summary>
ublic int Update(SFS.Entity.Model.c_hbbb_code model)
       {
eturn Update(model, null);
       }

// <summary>
//  更新一条数据
// </summary>
ublic int Update(SFS.Entity.Model.c_hbbb_code model, DbTransaction transaction)
       {
ry
           {
tring strSql = "UPDATE c_hbbb_code SET CODENO=@CODENO,CODENAME=@CODENAME,ISMX=@ISMX,ParentCodeNO=@ParentCodeNO,ZT=@ZT  WHERE  CodeID=@CodeID ";
               DbCommand dbCommand = db.GetSqlStringCommand(strSql);
               db.AddInParameter(dbCommand, "CodeID", DbType.Int32, model.CodeID);
               db.AddInParameter(dbCommand, "CODENO", DbType.String, model.CODENO);
               db.AddInParameter(dbCommand, "CODENAME", DbType.String, model.CODENAME);
               db.AddInParameter(dbCommand, "ISMX", DbType.String, model.ISMX);
               db.AddInParameter(dbCommand, "ParentCodeNO", DbType.String, model.ParentCodeNO);
               db.AddInParameter(dbCommand, "ZT", DbType.String, model.ZT);

f (transaction == null)
               {
eturn db.ExecuteNonQuery(dbCommand);
               }
lse
               {
eturn db.ExecuteNonQuery(dbCommand, transaction);
               }
           }
atch (UpdateException updateex)
           {
               updateex.DeveloperMessage = "修改c_hbbb_code记录失败！" + updateex.Message + "在" + this.ToString() + ".Update(SFS.Entity.Model.c_hbbb_code model)中";
               updateex.UserMessage = "修改c_hbbb_code记录失败！";
hrow updateex;
           }
       }

// <summary>
// 删除一条数据
// </summary>
ublic int Delete(string CodeID)
       {
eturn Delete(CodeID, null);
       }

// <summary>
// 删除一条数据
// </summary>
ublic int Delete(string CodeID, DbTransaction transaction)
       {
ry
           {
f (string.IsNullOrEmpty(CodeID))
               {
                   NOIsNullOrEmptyException exception = new NOIsNullOrEmptyException();
                   exception.DeveloperMessage = "CodeID编号不能为空！在" + this.ToString() + ".Delete(string CodeID)中";
                   exception.UserMessage = "CodeID编号不能为空！";
hrow exception;
               }


tring strSql = "DELETE FROM c_hbbb_code WHERE  CodeID=@CodeID ";
               DbCommand dbCommand = db.GetSqlStringCommand(strSql);
               db.AddInParameter(dbCommand, "CodeID", DbType.String, CodeID);

f (transaction == null)
               {
eturn db.ExecuteNonQuery(dbCommand);
               }
lse
               {
eturn db.ExecuteNonQuery(dbCommand, transaction);
               }
           }
atch (DeleteException deleteex)
           {
               deleteex.DeveloperMessage = "删除c_hbbb_code记录失败！" + deleteex.Message + "在" + this.ToString() + ".Delete(string CodeID)中";
               deleteex.UserMessage = "删除c_hbbb_code记录失败！";
hrow deleteex;
           }
       }

// <summary>
// 得到一个对象实体
// </summary>
ublic SFS.Entity.Model.c_hbbb_code GetModel(string CodeID)
       {
f (string.IsNullOrEmpty(CodeID))
           {
               NOIsNullOrEmptyException exception = new NOIsNullOrEmptyException();
               exception.DeveloperMessage = "CodeID编号不能为空！在" + this.ToString() + ".GetModel(string CodeID)中";
               exception.UserMessage = "CodeID编号不能为空！";
hrow exception;
           }

           StringBuilder strSql = new StringBuilder();
           strSql.Append("SELECT CodeID,CODENO,CODENAME,ISMX,ParentCodeNO,ZT ");
           strSql.Append(" FROM c_hbbb_code ");
           strSql.Append(" WHERE  CodeID=@CodeID ");

           DbCommand dbCommand = db.GetSqlStringCommand(strSql.ToString());
           db.AddInParameter(dbCommand, "CodeID", DbType.String, CodeID);


           SFS.Entity.Model.c_hbbb_code model = null;
sing (IDataReader dataReader = db.ExecuteReader(dbCommand))
           {
f (dataReader.Read())
               {
                   model = ReaderBind(dataReader);
               }
           }
eturn model;
       }

// <summary>
// 获得数据列表
// </summary>
ublic DataSet GetDataSet(string strWhere)
       {
ry
           {
               StringBuilder strSql = new StringBuilder();
               strSql.Append("SELECT CodeID,CODENO,CODENAME,ISMX,ParentCodeNO,ZT ");
               strSql.Append(" FROM c_hbbb_code ");
f (strWhere.Trim() != "")
               {
                   strSql.Append(" WHERE " + strWhere);
               }
eturn db.ExecuteDataSet(CommandType.Text, strSql.ToString());
           }
atch (SelectException selectex)
           {
               selectex.DeveloperMessage = "查询记录失败！" + selectex.Message + "在" + this.ToString() + ".GetDataSet(string strWhere)中";
               selectex.UserMessage = "查询记录失败！";
hrow selectex;
           }
       }

// <summary>
// 获得数据列表（比DataSet效率高，推荐使用）
// </summary>
ublic List<SFS.Entity.Model.c_hbbb_code> GetList(string strWhere)
       {
ry
           {
               StringBuilder strSql = new StringBuilder();
               strSql.Append("SELECT CodeID,CODENO,CODENAME,ISMX,ParentCodeNO,ZT ");
               strSql.Append(" FROM c_hbbb_code ");
f (strWhere.Trim() != "")
               {
                   strSql.Append(" WHERE " + strWhere);
               }
               List<SFS.Entity.Model.c_hbbb_code> list = new List<SFS.Entity.Model.c_hbbb_code>();
sing (IDataReader dataReader = db.ExecuteReader(CommandType.Text, strSql.ToString()))
               {
hile (dataReader.Read())
                   {
                       list.Add(ReaderBind(dataReader));
                   }
               }
eturn list;
           }
atch (SelectException selectex)
           {
               selectex.DeveloperMessage = "查询记录失败！" + selectex.Message + "在" + this.ToString() + ".GetList(string strWhere)中";
               selectex.UserMessage = "查询记录失败！";
hrow selectex;
           }
       }


// <summary>
// 对象实体绑定数据
// </summary>
ublic SFS.Entity.Model.c_hbbb_code ReaderBind(IDataReader dataReader)
       {
           SFS.Entity.Model.c_hbbb_code model = new SFS.Entity.Model.c_hbbb_code();
bject obj;

           obj = dataReader["CodeID"];
f (obj != null && obj != DBNull.Value)
           {
               model.CodeID = (int)obj;
           }

           obj = dataReader["CODENO"];
f (obj != null && obj != DBNull.Value)
           {
               model.CODENO = obj.ToString();
           }

           obj = dataReader["CODENAME"];
f (obj != null && obj != DBNull.Value)
           {
               model.CODENAME = obj.ToString();
           }

           obj = dataReader["ISMX"];
f (obj != null && obj != DBNull.Value)
           {
               model.ISMX = obj.ToString();
           }

           obj = dataReader["ParentCodeNO"];
f (obj != null && obj != DBNull.Value)
           {
               model.ParentCodeNO = obj.ToString();
           }

           obj = dataReader["ZT"];
f (obj != null && obj != DBNull.Value)
           {
               model.ZT = obj.ToString();
           }

eturn model;
       }

     }

 
4.Bll层（跟具体业务有关的逻辑）

[c-sharp] view plaincopy

odenamespace SFS.BLL

// <summary>
// 业务逻辑类bllADDRESS 的摘要说明。
// </summary>
ublic class c_hbbb_code
   {
rivate readonly SFS.DAL.c_hbbb_code dal = new SFS.DAL.c_hbbb_code();
ublic c_hbbb_code()
       { }
       #region  成员方法
// <summary>
// 是否存在该记录
// </summary>
ublic bool Exists(string CodeID)
       {
ry
           {
eturn dal.Exists(CodeID);
           }
atch (ExceptionBase ex)
           {
               SFS.Utility.ExceptionUtility.ExceptionHelper.HandleException(ex, Policy.BLLPolicy);
eturn false;
           }
       }

// <summary>
// 增加一条数据
// </summary>
ublic int Add(SFS.Entity.Model.c_hbbb_code model)
       {
ry
           {
eturn dal.Add(model);
           }
atch (ExceptionBase ex)
           {
               SFS.Utility.ExceptionUtility.ExceptionHelper.HandleException(ex, Policy.BLLPolicy);
eturn 0;
           }
       }

// <summary>
// 更新一条数据
// </summary>
ublic int Update(SFS.Entity.Model.c_hbbb_code model)
       {
ry
           {
eturn dal.Update(model);
           }
atch (ExceptionBase ex)
           {
               SFS.Utility.ExceptionUtility.ExceptionHelper.HandleException(ex, Policy.BLLPolicy);
eturn 0;
           }
       }

// <summary>
// 删除一条数据
// </summary>
ublic int Delete(string CodeID)
       {
ry
           {
eturn dal.Delete(CodeID);
           }
atch (ExceptionBase ex)
           {
               SFS.Utility.ExceptionUtility.ExceptionHelper.HandleException(ex, Policy.BLLPolicy);
eturn 0;
           }
       }

// <summary>
// 得到一个对象实体
// </summary>
ublic SFS.Entity.Model.c_hbbb_code GetModel(string CodeID)
       {
ry
           {
eturn dal.GetModel(CodeID);
           }
atch (ExceptionBase ex)
           {
               SFS.Utility.ExceptionUtility.ExceptionHelper.HandleException(ex, Policy.BLLPolicy);
eturn null;
           }
       }


// <summary>
// 获得数据列表
// </summary>
ublic DataSet GetDataSet(string strWhere)
       {
ry
           {
eturn dal.GetDataSet(strWhere);
           }
atch (ExceptionBase ex)
           {
               SFS.Utility.ExceptionUtility.ExceptionHelper.HandleException(ex, Policy.BLLPolicy);
eturn null;
           }
       }

// <summary>
// <summary>
// 获得数据列表
// </summary>
ublic List<SFS.Entity.Model.c_hbbb_code> GetList(string strWhere)
       {
ry
           {
eturn dal.GetList(strWhere);
           }
atch (ExceptionBase ex)
           {
               SFS.Utility.ExceptionUtility.ExceptionHelper.HandleException(ex, Policy.BLLPolicy);
eturn null;
           }
       }


       #endregion  成员方法



   }

5.UI层（用户界面）

常用界面功能代码

加载数据

private void LoadData(string SJJG)

{

SFS.Bll.c_hbbb_code objC_SUBCOMPANY=new SFS.Bll.c_hbbb_code();

this.GridView1.DataSource = objC_SUBCOMPANY.GetList(“”);

this.GridView1.DataBind();

}

分页

protected voidGridView1_PageIndexChanging(objectsender,GridViewPageEventArgs e)

{

this.GridView1.PageIndex = e.NewPageIndex;

LoadData(“”);

}

绑定时自动加入序号

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowType == DataControlRowType.DataRow)

{

RadioButton rb = (RadioButton)e.Row.FindControl("rbSelect");

rb.Attributes.Add("onclick", "CheckOne(this);");

e.Row.Cells[1].Text = Convert.ToString(e.Row.RowIndex + 1);

}

}

添加

protected void btnAdd_Click(object sender, EventArgs e)

{

Response.Redirect("Add.aspx?JGDM=" + SJJG);

}

删除

protected void btnUpdate_Click(object sender, EventArgs e)

{

foreach (GridViewRow row in GridView1.Rows)

{

RadioButton radio = row.FindControl("rbSelect") as RadioButton;

if (radio != null && radio.Checked)

{

Label lblID = (Label)row.FindControl("lblJGDM");

Response.Redirect("Delete.aspx?JGDM=" + SJJG);

break;

}

}

}

修改

protected void btnUpdate_Click(object sender, EventArgs e)

{

foreach (GridViewRow row in GridView1.Rows)

{

RadioButton radio = row.FindControl("rbSelect") as RadioButton;

if (radio != null && radio.Checked)

{

Label lblID = (Label)row.FindControl("lblJGDM");

Response.Redirect("Update.aspx?JGDM=" + SJJG);

break;

}

}

}

一般写界面代码逻辑顺序