存储过程动态配置

using System;
using System.Text.RegularExpressions;
using System.Web;
using System.Reflection;
using System.Configuration;
using System.Xml;
using System.Xml.Serialization;
using System.Xml.XPath;namespace WebApplication2
{
/// <summary>
/// ProcedureConfig 的摘要说明。
/// </summary>
public class ProcedureConfig:System.Configuration.IConfigurationSectionHandler
{

public ProcedureConfig()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
private Command[] _Commands;
[XmlArray("Commands")]
public Command[] Commands
{
get
{
return this._Commands;}
set
{
this._Commands=value;

}
}
public static ProcedureConfig Instance()
{
return ((ProcedureConfig)ConfigurationSettings.GetConfig("ProcedureConfig"));
}
public static System.Data.SqlClient.SqlCommand GetCommandByName(string cmdname)
{
ProcedureConfig cfg=ProcedureConfig.Instance ();
foreach(Command cmd in cfg.Commands)
{
if(cmd.CommandText.ToUpper ()==cmdname.ToUpper ())
return cmd.toSqlCommand ();
}
throw new Exception("Command Not Found");
}
public static System.Data.SqlClient.SqlConnection GetSqlConn() {
return new System.Data.SqlClient.SqlConnection("server=.;uid=sa;pwd=;database=ORM");
}
#region IConfigurationSectionHandler 成员
public object Create(object parent, object configContext, XmlNode section)
{
// TODO: 添加 ProcedureConfig.Create 实现
XPathNavigator nav = section.CreateNavigator();
string typename = (string) nav.Evaluate("string(@type)");
Type t = Type.GetType(typename);
XmlSerializer ser = new XmlSerializer(t);
return ser.Deserialize(new XmlNodeReader(section));
} #endregion
}
public class Pm
{
/*<Pm ParameterName="@ID" Direction="Output" SqlDbType="Int" Size="4"></Pm>*/ public Pm()
{
}
private string _ParameterName;
[XmlAttribute("ParameterName")]
public string ParameterName
{
get
{
return this._ParameterName;}
set
{
this._ParameterName=value;

}
}
private System.Data.ParameterDirection _Direction;
[XmlAttribute("Direction")]
public System.Data.ParameterDirection Direction
{
get
{
return this._Direction;}
set
{
this._Direction=value;

}
}
private System.Data.SqlDbType _SqlType;
[XmlAttribute("SqlDbType")]
public System.Data.SqlDbType SqlDbType
{
get
{
return this._SqlType;}
set
{
this._SqlType=value;

}
}
private int _Size;
[XmlAttribute("Size")]
public int Size
{
get
{
return this._Size;}
set
{
this._Size=value;

}
}
private readonly object HandlerLock = new object();
private ConstructorInfo constructor = null;
public object Instance()
{
if(constructor == null)
{
lock(HandlerLock)
{
if(constructor == null)
{
System.Type t = System.Type.GetType("WebApplication2.Pm,WebApplication2");
constructor = t.GetConstructor(new Type[0]);
}
}
}
return constructor.Invoke(null);
}
public System.Data.SqlClient.SqlParameter toSqlParameter()
{
System.Data.SqlClient.SqlParameter pa=new System.Data.SqlClient.SqlParameter();
pa.ParameterName=this.ParameterName;
pa.Direction=this.Direction ;
pa.Size=this.Size;
pa.SqlDbType=this.SqlDbType;
return pa;
}
}
public class Command
{
private string _CommandText;
[XmlAttribute("CommandText")]
public string CommandText
{
get
{
return this._CommandText;}
set
{
this._CommandText=value;

}
}
private Pm[] _Parameters;
[XmlArray("Parameters")]
public Pm[] Parameters
{
get
{
return this._Parameters;}
set
{
this._Parameters=value;

}
}
public Command()
{
}
private readonly object HandlerLock = new object();
private ConstructorInfo constructor = null;
public object Instance()
{
if(constructor == null)
{
lock(HandlerLock)
{
if(constructor == null)
{
System.Type t = System.Type.GetType("WebApplication2.Command,WebApplication2");
constructor = t.GetConstructor(new Type[0]);
}
}
}
return constructor.Invoke(null);
}
public System.Data.SqlClient.SqlCommand toSqlCommand()
{
System.Data.SqlClient.SqlCommand cmd=new System.Data.SqlClient.SqlCommand();
cmd.CommandText=this.CommandText;
cmd.CommandType=System.Data.CommandType.StoredProcedure;
foreach(Pm pm in this.Parameters)
{

cmd.Parameters.Add(pm.toSqlParameter ());
}
return cmd;
}

//<Command CommandText="tAdd" CommandType="StoredProcedure">
}
}
///////////////////自定义配置节<configSections>
<!--存储过程配置-->
<section name="ProcedureConfig" type="WebApplication2.ProcedureConfig,WebApplication2"></section>
</configSections>

<ProcedureConfig type="WebApplication2.ProcedureConfig,WebApplication2">
<Commands>
<Command CommandText="tAdd">
<Parameters>
<Pm ParameterName="@ID" Direction="Output" SqlDbType="Int" Size="4"></Pm>
<Pm ParameterName="@PC" Direction="Input" SqlDbType="VarChar" Size="50"></Pm>
</Parameters>
</Command>
</Commands>
</ProcedureConfig>
////////////////调用方式
using(System.Data.SqlClient.SqlConnection cnn=ProcedureConfig.GetSqlConn())
{
cnn.Open ();
System.Data.SqlClient.SqlCommand cmd=ProcedureConfig.GetCommandByName("tAdd");
cmd.Connection=cnn;
cmd.Parameters[1].Value="dhz";
cmd.ExecuteReader ();
cnn.Close ();
Response.Write(cmd.CommandText);
Response.Write(cmd.Parameters[0].Value .ToString ());
}
/////////////////////////////存储过程如下:
ALTER procedure tAdd
(
@id int output,
@pc varchar(50)
)
as
Begin
Select @id=4
select * from proTab where proName like '%'+@pc or proName like @pc+'%'

End
/////////////////////执行结果是正确的