我正在玩类生成（表的一个类 - 继承等。暂时不考虑......）。所以我从这里无耻地复制了 Reflection.Emit 代码。将其重新设计为在给定数据库中的每个表中生成，并在项目的 bin 文件夹中使用以下批处理调用创建文件： for /f "tokens=*" %%i in ('dir *.xsd /b') do " C:\Program Files\Microsoft SDKs\Windows\v6.0A\bin\xsd.exe" -c -l:c# -n:BusinessObjects %i
到现在为止还挺好。这个想法是每次新的数据库版本到来时重新生成类并将它们复制到“真实项目”中（我不需要任何运行时生成）并且也想享受 Intellisense。这种方法可能会出现什么陷阱、困难和问题，对那些描述松散的需求有什么更好的建议吗？！
这是创建程序集的控制台应用程序的生成代码：
using System;
using System.Collections.Generic;
using System.Text;
using log4net;
using log4net.Config;
using System.Data;
using System.Data.SqlClient;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;
namespace GenerateAssemblies
{
class Program
{
private static readonly ILog logger =
LogManager.GetLogger ( typeof ( Program ) );
static void Main ( string[] args )
{
DOMConfigurator.Configure(); //tis configures the logger
logger.Debug ( "APP START" );
DataTable dtTables = Program.GetTablesFromDb ( "POC" ) ;
foreach (DataRow dr in dtTables.Rows)
{
string strTableName = dr[0].ToString () ;
CodeEmitGeneratingAssemblies.DllGenerator.WriteXmlAndTxtFileOutOfDataTableByName ( strTableName);
CodeEmitGeneratingAssemblies.DllGenerator.CreateAssembly ( strTableName );
}
Console.WriteLine ( " Should have now all the dll's " );
Console.ReadLine ();
} //eof method
static DataTable GetTablesFromDb ( string strDbName )
{
DataTable dt = new DataTable ( "tables" );
string connectionString = "Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=" + strDbName + ";Data Source=ysg";
using (SqlConnection connection = new SqlConnection ( connectionString ))
{
SqlCommand command = connection.CreateCommand ();
command.CommandText = string.Format ( "SELECT name from sys.tables" );
connection.Open ();
dt.Load ( command.ExecuteReader ( CommandBehavior.CloseConnection ) );
}
return dt;
} //eof method
} //eof class
namespace CodeEmitGeneratingAssemblies
{
public class DllGenerator
{
private static readonly ILog logger =
LogManager.GetLogger ( typeof ( DllGenerator ) );
public static void WriteXmlAndTxtFileOutOfDataTableByName (string strDataTableName)
{
DOMConfigurator.Configure (); //tis configures the logger
DataTable tableData = new DataTable ( strDataTableName );
string connectionString = "Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=POC;Data Source=ysg";
using (SqlConnection connection = new SqlConnection ( connectionString ))
{
SqlCommand command = connection.CreateCommand ();
command.CommandText = string.Format ( "SELECT * FROM [" + strDataTableName + "]");
logger.Debug ( "command.CommandText is " + command.CommandText );
connection.Open ();
tableData.Load ( command.ExecuteReader ( CommandBehavior.CloseConnection ) );
}
tableData.WriteXml ( strDataTableName + ".xml" );
tableData.WriteXmlSchema ( strDataTableName + ".xsd" );
} //eof method
public static void CreateAssembly ( string strDataTableName )
{
AppDomain currentDomain = Thread.GetDomain ();
AssemblyName myAssemblyName = new AssemblyName ( );
myAssemblyName.Name = strDataTableName;
AssemblyBuilder builder = currentDomain.DefineDynamicAssembly (
myAssemblyName,
AssemblyBuilderAccess.RunAndSave );
builder.AddResourceFile ( "TableXml", strDataTableName + ".xml" );
builder.AddResourceFile ( "TableXsd", strDataTableName + ".xsd" );
builder.Save ( strDataTableName + ".dll" );
}
} //eof class
} //eof namespace
} //eof namespace