一个通用的存储过程调用类

2009-12-14 18:40| 发布者: admin| 查看: 35| 评论: 0|原作者: 云忆

△usingSystem; usingSy......

using System;
using System.IO;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections;
using System.Web;

namespace Forum.Component
{
///

/// 存储过程的返回值纪录类
/// DataSet : 表示返回的表
/// Output : 存储过程的输出参数
/// Value : 存储过程的返回值
///

public class SqlResult
{
public int Value;
public Hashtable Output;
public DataSet dataSet;

public SqlResult()
{
Value = 0;
Output = new Hashtable();
dataSet = new DataSet();
}
}

///

/// 用于调用数据库中的存储过程，返回一个DataSet、Output、Value的SqlResult类
///

public class SqlProcedure
{
private string sp_name;
private SqlConnection myConnection;
private SqlCommand myCommand;
private SqlParameter myParameter;

public string ProcedureName
{
get{ return this.sp_name; }
set{ this.sp_name = value; }
}

public SqlProcedure() : this("")
{
}

public SqlProcedure(string sp_name)
{
this.ProcedureName = sp_name;
}

public SqlResult Call(params object[] parameters)
{
SqlResult result = new SqlResult();

myConnection = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionString"]);

myCommand = new SqlCommand(this.ProcedureName, myConnection);
myCommand.CommandType = CommandType.StoredProcedure;

SqlDataAdapter myAdapter = new SqlDataAdapter(myCommand);

try
{
myConnection.Open();

GetProcedureParameter(parameters);

myAdapter.Fill(result.dataSet, "Table");

GetOutputValue(result);
}
catch(Exception e)
{
throw e;
}
finally
{
myAdapter.Dispose();
myCommand.Dispose();
myConnection.Close();
myConnection.Dispose();
}

return result;
}

private void GetProcedureParameter(params object[] parameters)
{
SqlCommand myCommand2 = new SqlCommand();

myCommand2.Connection = this.myConnection;
myCommand2.CommandText = "select * from INFORMATION_SCHEMA.PARAMETERS where SPECIFIC_NAME='" +this.ProcedureName+ "' order by ORDINAL_POSITION";

SqlDataReader reader = null;
try
{
reader = myCommand2.ExecuteReader();
myParameter = new SqlParameter();
myParameter.ParameterName = "@Value";
myParameter.SqlDbType = SqlDbType.Int;
myParameter.Direction = ParameterDirection.ReturnValue;

myCommand.Parameters.Add(myParameter);
int i = 0;
while(reader.Read())
{
myParameter = new SqlParameter();

myParameter.ParameterName = reader["PARAMETER_NAME"].ToString();
myParameter.Direction = reader["PARAMETER_MODE"].ToString()=="IN"?ParameterDirection.Input:ParameterDirection.Output;

switch(reader["DATA_TYPE"].ToString())
{
case "bit" :
if(myParameter.Direction == ParameterDirection.Input)
myParameter.Value = (bool)parameters[i];
myParameter.SqlDbType = SqlDbType.Bit;
break;

case "bigint" :
if(myParameter.Direction == ParameterDirection.Input)
myParameter.Value = (int)parameters[i];
myParameter.SqlDbType = SqlDbType.BigInt;
break;

case "int" :
if(myParameter.Direction == ParameterDirection.Input)
myParameter.Value = (int)parameters[i];
myParameter.SqlDbType = SqlDbType.Int;
break;

case "decimal" :
if(myParameter.Direction == ParameterDirection.Input)
myParameter.Value = (double)parameters[i];
myParameter.SqlDbType = SqlDbType.Decimal;
myParameter.Precision = (byte)reader["NUMERIC_PRECISION"];
myParameter.Scale = (byte)reader["NUMERIC_SCALE"];
break;

case "nvarchar" :
if(myParameter.Direction == ParameterDirection.Input)
myParameter.Value = (string)parameters[i];
myParameter.Size = (int)reader["CHARACTER_MAXIMUM_LENGTH"];
myParameter.SqlDbType = SqlDbType.NVarChar;
break;

case "varchar" :
if(myParameter.Direction == ParameterDirection.Input)
myParameter.Value = (string)parameters[i];
myParameter.Size = (int)reader["CHARACTER_MAXIMUM_LENGTH"];
myParameter.SqlDbType = SqlDbType.VarChar;
break;

case "nchar" :
if(myParameter.Direction == ParameterDirection.Input)
myParameter.Value = (string)parameters[i];
myParameter.Size = (int)reader["CHARACTER_MAXIMUM_LENGTH"];
myParameter.SqlDbType = SqlDbType.NChar;
break;

case "char" :
if(myParameter.Direction == ParameterDirection.Input)
myParameter.Value = (string)parameters[i];
myParameter.Size = (int)reader["CHARACTER_MAXIMUM_LENGTH"];
myParameter.SqlDbType = SqlDbType.Char;
break;

case "ntext" :
if(myParameter.Direction == ParameterDirection.Input)
myParameter.Value = (string)parameters[i];
myParameter.SqlDbType = SqlDbType.NText;
break;

case "text" :
if(myParameter.Direction == ParameterDirection.Input)
myParameter.Value = (string)parameters[i];
myParameter.SqlDbType = SqlDbType.Text;
break;

case "datetime" :
if(myParameter.Direction == ParameterDirection.Input)
myParameter.Value = (DateTime)parameters[i];
myParameter.SqlDbType = SqlDbType.DateTime;
break;
case "smalldatetime" :
if(myParameter.Direction == ParameterDirection.Input)
myParameter.Value = (DateTime)parameters[i];
myParameter.SqlDbType = SqlDbType.DateTime;
break;
case "image" :
if(myParameter.Direction == ParameterDirection.Input)
{
HttpPostedFile PostedFile = (HttpPostedFile)parameters[i];

Byte[] FileByteArray = new Byte[PostedFile.ContentLength];
Stream StreamObject = PostedFile.InputStream;
StreamObject.Read(FileByteArray,0,PostedFile.ContentLength);

myParameter.Value = FileByteArray;
}

myParameter.SqlDbType = SqlDbType.Image;
break;

case "uniqueidentifier" :
//myParameter.Value = (string)parameters[i];
myParameter.SqlDbType = SqlDbType.UniqueIdentifier;
break;

default : break;
}
i++;

myCommand.Parameters.Add(myParameter);
}
}
catch(Exception e)
{
throw e;

}
finally
{
if(reader!=null) reader.Close();
myCommand2.Dispose();
}
}

private void GetOutputValue(SqlResult result)
{
result.Value = (int)myCommand.Parameters["@Value"].Value;

foreach(SqlParameter parameter in myCommand.Parameters)
{
if(parameter.Direction == ParameterDirection.Output)
{
result.Output.Add(parameter.ParameterName, parameter.Value);
}
}
}
}
}

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一个通用的存储过程调用类

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