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目錄
目錄X

用CodeSmith生成自定義模板

  當生成應(yīng)用程序時,無論是編寫數(shù)據(jù)訪問代碼還是生成自定義實體自定義集合,你會發(fā)現(xiàn)經(jīng)常需要重復完成某些特定的任務(wù)。最近用CodeSmith編寫了界面層到數(shù)據(jù)庫訪問層的模板以及用于生成存儲過程的模板,感覺CodeSmith非常不錯,不僅有利于提高團隊的工作效率,自動完成那些最為乏味的任務(wù),而且有利于讓大家的代碼保持一定的一致性和規(guī)范性。下面詳細介紹一下如何生成自定義模板(以自定義實體為列),以作為總結(jié),也希望對您有所幫助。

第一步是添加模板頭,聲明模板的語言、目標語言以及簡要模板說明:

以下是代碼片段:
<%@ CodeTemplate Language="C#" TargetLanguage="Text" Src="" Inherits="" Debug="False" Description="Template description here." %>

指明這是一個C#語言的模板。CodeSmith 包括一個名為 SchemaExplorer 的特殊的程序集,可用來從表、存儲過程或幾乎任何其他 SQL Server對象生成模板。下面引入該集合和命名空間:

以下是代碼片段:
<%@ Assembly Name="System.Data" %>
<%@ Import Namespace="System.Data" %>
<%@ Assembly Name="SchemaExplorer" %>
<%@ Import Namespace="SchemaExplorer" %>

第二步,屬性聲明,在這里可聲明將在模板每次運行時指定的屬性,以方便設(shè)置一系列需要傳入的參數(shù):

以下是代碼片段:
<%@ Property Name="DataBase" Type="SchemaExplorer.DatabaseSchema" Category="Context" Description="aaa" %>

如上邊所示,在進行代碼生成時,在CodeSmith Explorer中選擇模板后生成代碼的窗口中,變量的名稱為DataBase,類型是SchemaExplorer.DatabaseSchema,類別是Context,當用戶選中這個屬性時對于屬性的描述Description。

以下是代碼片段:
<%@ Property Name="TableName" Type="System.String" Default="" Optional="False" Category="Strings" Description="bbb" %>
<%@ Property Name="NameSpace" Type="System.String" Default="" Optional="True" Category="Strings" Description="cccc" %>

如上邊所示,變量的名稱為TableName,NameSpace,類型是String,類別是Strings,當用戶選中這個屬性時對于屬性的描述Description。

以下是代碼片段:
<%@ Property Name="Author" Type="System.String" Default="Author" Optional="False" Category="" Description="??" %>
<%@ Property Name="Description" Type="System.String" Default="Description" Optional="False" Category="" Description="?????" %>

如上面所示,變量的名稱為Author,Description,類型是String,類別為空(顯示為“雜項”),當用戶選中這個屬性時對于屬性的描述Description。

相應(yīng)屬性界面顯示如下圖所示:

第三步,編寫C#語言模板類部分代碼。CodeSmith模板腳本格式:

以下是代碼片段:
CodeTemplateRule rule=new CodeTemplateRule();

public class CodeTemplateRule
{

實例化類CodeTemplateRule。

以下是代碼片段:
public ColumnSchemaCollection GetColumnCollection(DatabaseSchema dataBase,string tableName)
{
TableSchemaCollection tables = new TableSchemaCollection(dataBase.Tables);
ColumnSchemaCollection columns=null;
for(int i=0;i {
if(tables[i].Name.ToUpper()==tableName.ToUpper())
{
TableSchema ts=tables[i];
columns=new ColumnSchemaCollection(ts.Columns);
}
}
return columns;
}

函數(shù)作用:輸入數(shù)據(jù)庫名和表名,得到列集合信息。用內(nèi)部函數(shù)ColumnSchemaCollection可以得到某張表的所有列的集合。

以下是代碼片段:
public string GetTableName(string tableName)
{
int i=tableName.IndexOf("_");
return tableName.Substring(i+1,tableName.Length-(i+1));
}

函數(shù)作用:對輸入的表名格式化,得到去掉前綴的表名,如PE_User,返回User。

以下是代碼片段:
public string GetType(ColumnSchema column)
{
if (column.Name.EndsWith("TypeCode")) return column.Name;

switch (column.DataType)
{
case DbType.AnsiString: return "string";
case DbType.AnsiStringFixedLength: return "string";
case DbType.Binary: return "byte[]";
case DbType.Boolean: return "bool";
case DbType.Byte: return "int";
case DbType.Currency: return "decimal";
case DbType.Date: return "DateTime";
case DbType.DateTime: return "DateTime";
case DbType.Decimal: return "decimal";
case DbType.Double: return "double";
case DbType.Guid: return "Guid";
case DbType.Int16: return "short";
case DbType.Int32: return "int";
case DbType.Int64: return "long";
case DbType.Object: return "object";
case DbType.SByte: return "sbyte";
case DbType.Single: return "float";
case DbType.String: return "string";
case DbType.StringFixedLength: return "string";
case DbType.Time: return "TimeSpan";
case DbType.UInt16: return "ushort";
case DbType.UInt32: return "uint";
case DbType.UInt64: return "ulong";
case DbType.VarNumeric: return "decimal";
default:
{
return "__UNKNOWN__" + column.NativeType;
}
}
}

函數(shù)作用:得到表字段的類型。

以下是代碼片段:
public string GetDefaultValue(ColumnSchema column)
{
if (column.Name.EndsWith("TypeCode")) return column.Name;

switch (column.DataType)
{
case DbType.AnsiString: return "\"\"";
case DbType.AnsiStringFixedLength: return "\"\"";
case DbType.Binary: return "null";
case DbType.Boolean: return "false";
case DbType.Byte: return "0";
case DbType.Currency: return "0";
case DbType.Date: return "DateTime.Parse(\"1900-1-1\")";
case DbType.DateTime: return "DateTime.Parse(\"1900-1-1\")";
case DbType.Decimal: return "0";
case DbType.Double: return "0";
case DbType.Guid: return "Guid.NewGuid().ToString()";
case DbType.Int16: return "0";
case DbType.Int32: return "0";
case DbType.Int64: return "0";
case DbType.Object: return "\"\"";
case DbType.SByte: return "0";
case DbType.Single: return "0";
case DbType.String: return "\"\"";
case DbType.StringFixedLength: return "";
case DbType.Time: return "DateTime.Parse(\"1900-1-1\")";
case DbType.UInt16: return "0";
case DbType.UInt32: return "0";
case DbType.UInt64: return "0";
case DbType.VarNumeric: return "0";
default:
{
return "__UNKNOWN__" + column.NativeType;
}
}
}

函數(shù)作用:得到表字段的默認值。

以下是代碼片段:
public string ConvPropertyName(string name)
{
return name.Substring(0,1).ToUpper() +
name.Substring(1);
}

函數(shù)作用:對輸入的名稱格式化,得到首字母為大寫的名稱,如user,返回User。

第四步,編寫實際生成模板主體的代碼,根據(jù)你需要的格式輸出。代碼如下:

以下是代碼片段:

using System;
using System.Collections.Generic;
using System.Text;

namespace PowerEasy.Model.<%= NameSpace %>
{
///


/// Description:<%= Description %>
///

public class <%= rule.ConvPropertyName(rule.GetTableName(TableName)) %>Info
{
///
///<%= Description %>
///

public <%= rule.ConvPropertyName(rule.GetTableName(TableName)) %>Info()
{
}

<%
ColumnSchemaCollection columns=rule.GetColumnCollection(DataBase,TableName);
for(int i=0;i {
Response.Write(" //"+columns[i].Description+"\r\n");
Response.Write(" private "+rule.GetType(columns[i])+" m_"+columns[i].Name+";\r\n");
}
%>

#region
<%
for(int i=0;i {
%>
///
///<%= columns[i].Description %>
///

public <%= rule.GetType(columns[i]) %> <%= rule.ConvPropertyName(columns[i].Name) %>
{
get { return m_<%= columns[i].Name %>; }
set { m_<%= columns[i].Name %>=value; }
}
<%
}
%>
#endregion
}
}

最后,CodeSmithStudio.exe運行模板 。填寫你的參數(shù),運行后就得到了你需要的實體代碼:

以下是引用片段:
using System;
using System.Collections.Generic;
using System.Text;

namespace AAA
{
///


/// Description:BBB實體
///

public class OrderInfo
{
///
///Description
///

public OrderInfo()
{
}

//訂單ID
private int m_OrderId;
//訂單編號
private string m_OrderNum;
//用戶名
private string m_UserName;
//代理商名
private string m_AgentName;
//客戶ID
private int m_ClientId;
//訂單總金額
private decimal m_MoneyTotal;
//購買商品合計金額
private decimal m_MoneyGoods;
//是否需要開發(fā)票
private bool m_NeedInvoice;
//發(fā)表內(nèi)容,包括抬頭、商品名稱、金額等
private string m_InvoiceContent;
//是否已開發(fā)票
private bool m_Invoiced;
//備注
private string m_Remark;
//已收款
private decimal m_MoneyReceipt;
//開始服務(wù)日期
private DateTime m_BeginDate;
//錄入時間
private DateTime m_InputTime;
//受貨人姓名
private string m_ContacterName;
//收貨人地址
private string m_Address;
//郵編
private string m_ZipCode;
//手機
private string m_Mobile;
//聯(lián)系電話
private string m_Phone;
//EMAIL
private string m_Email;
//付款方式
private int m_PaymentType;
//送貨方式
private int m_DeliverType;
//訂單狀態(tài)
private int m_Status;
//物流狀態(tài)
private int m_DeliverStatus;
//是否開通下載
private bool m_EnableDownload;
//返還的現(xiàn)金券
private decimal m_PresentMoney;
//贈送點券
private int m_PresentPoint;
//得到的積分
private int m_PresentExp;
//付款方式的折扣
private double m_Discount_Payment;
//運費
private decimal m_Charge_Deliver;
private string m_ClientName;

#region
///


///訂單ID
///

public int OrderId
{
get { return m_OrderId; }
set { m_OrderId = value; }
}
///
///訂單編號
///

public string OrderNum
{
get { return m_OrderNum; }
set { m_OrderNum = value; }
}
///
///用戶名
///

public string UserName
{
get { return m_UserName; }
set { m_UserName = value; }
}
///
///代理商名
///

public string AgentName
{
get { return m_AgentName; }
set { m_AgentName = value; }
}
///
///客戶ID
///

public int ClientId
{
get { return m_ClientId; }
set { m_ClientId = value; }
}
///
///訂單總金額
///

public decimal MoneyTotal
{
get { return m_MoneyTotal; }
set { m_MoneyTotal = value; }
}
///
///購買商品合計金額
///

public decimal MoneyGoods
{
get { return m_MoneyGoods; }
set { m_MoneyGoods = value; }
}
///
///是否需要開發(fā)票
///

public bool NeedInvoice
{
get { return m_NeedInvoice; }
set { m_NeedInvoice = value; }
}
///
///發(fā)表內(nèi)容,包括抬頭、商品名稱、金額等
///

public string InvoiceContent
{
get { return m_InvoiceContent; }
set { m_InvoiceContent = value; }
}
///
///是否已開發(fā)票
///

public bool Invoiced
{
get { return m_Invoiced; }
set { m_Invoiced = value; }
}
///
///備注
///

public string Remark
{
get { return m_Remark; }
set { m_Remark = value; }
}
///
///已收款
///

public decimal MoneyReceipt
{
get { return m_MoneyReceipt; }
set { m_MoneyReceipt = value; }
}
///
///開始服務(wù)日期
///

public DateTime BeginDate
{
get { return m_BeginDate; }
set { m_BeginDate = value; }
}
///
///錄入時間
///

public DateTime InputTime
{
get { return m_InputTime; }
set { m_InputTime = value; }
}
///
///受貨人姓名
///

public string ContacterName
{
get { return m_ContacterName; }
set { m_ContacterName = value; }
}
///
///收貨人地址
///

public string Address
{
get { return m_Address; }
set { m_Address = value; }
}
///
///郵編
///

public string ZipCode
{
get { return m_ZipCode; }
set { m_ZipCode = value; }
}
///
///手機
///

public string Mobile
{
get { return m_Mobile; }
set { m_Mobile = value; }
}
///
///聯(lián)系電話
///

public string Phone
{
get { return m_Phone; }
set { m_Phone = value; }
}
///
///EMAIL
///

public string Email
{
get { return m_Email; }
set { m_Email = value; }
}
///
///付款方式
///

public int PaymentType
{
get { return m_PaymentType; }
set { m_PaymentType = value; }
}
///
///送貨方式
///

public int DeliverType
{
get { return m_DeliverType; }
set { m_DeliverType = value; }
}
///
///訂單狀態(tài)
///

public int Status
{
get { return m_Status; }
set { m_Status = value; }
}
///
///物流狀態(tài)
///

public int DeliverStatus
{
get { return m_DeliverStatus; }
set { m_DeliverStatus = value; }
}
///
///是否開通下載
///

public bool EnableDownload
{
get { return m_EnableDownload; }
set { m_EnableDownload = value; }
}
///
///返還的現(xiàn)金券
///

public decimal PresentMoney
{
get { return m_PresentMoney; }
set { m_PresentMoney = value; }
}
///
///贈送點券
///

public int PresentPoint
{
get { return m_PresentPoint; }
set { m_PresentPoint = value; }
}
///
///得到的積分
///

public int PresentExp
{
get { return m_PresentExp; }
set { m_PresentExp = value; }
}
///
///付款方式的折扣
///

public double DiscountPayment
{
get { return m_Discount_Payment; }
set { m_Discount_Payment = value; }
}
///
///運費
///

public decimal ChargeDeliver
{
get { return m_Charge_Deliver; }
set { m_Charge_Deliver = value; }
}
///
///客戶姓名
///

public string ClientName
{
get { return m_ClientName; }
set { m_ClientName = value; }
}
#endregion
}
}

CodeSmith 由 Eric J. Smith 編寫,下載地址是:

【打印正文】 發(fā)布時間:2006-09-03 12:49:51 瀏覽次數(shù): 作者:必武 來源:本站原創(chuàng)
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