using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
/// <summary>
/// Summary description for DataManager
/// </summary>
public sealed class DataManager
{
private SqlConnection _connection;
#region Constructors
private static DataManager instance = new DataManager();
public static DataManager Default
{
get
{
return instance;
}
}
private DataManager()
{
}
#endregion Constructor
private SqlConnection RequestConnection()
{
// TODO: Add logic
SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings[Parameters.DefaultConnectionName].ConnectionString);
connection.Open();
return connection;
}
private void ReleaseConnect(SqlConnection connection)
{
// TODO Here
if (connection == null)
{
throw new ArgumentNullException("connection");
}
//connection.Close();
}
public int ExecuteCommand(string text)
{
if (text == null)
{
throw new ArgumentNullException("text");
}
SqlConnection connection = null;
try
{
connection = this.RequestConnection();
SqlCommand command = new SqlCommand(text, connection);
return command.ExecuteNonQuery();
}
catch (SqlException exception)
{
return -1;
}
finally
{
this.ReleaseConnect(connection);
}
}
public SqlDataReader ExecuteCommandAndReturnReader(string text)
{
if (text == null)
{
throw new ArgumentNullException("text");
}
SqlConnection connection = null;
try
{
connection = this.RequestConnection();
SqlCommand command = new SqlCommand(text, connection);
return command.ExecuteReader();
}
catch (Exception e)
{
return null;
}
finally
{
this.ReleaseConnect(connection);
}
}
public SqlDataReader ExecuteSpCommandAndReturnReader(string text)
{
if (text == null)
{
throw new ArgumentNullException("text");
}
SqlConnection connection = null;
try
{
connection = this.RequestConnection();
SqlCommand command = new SqlCommand(text, connection);
command.CommandType = CommandType.StoredProcedure;
return command.ExecuteReader();
}
catch (Exception e)
{
return null;
}
finally
{
this.ReleaseConnect(connection);
}
}
public SqlDataReader ExecuteSpCommandAndReturnReader(string text,string parameter, int id)
{
if (text == null)
{
throw new ArgumentNullException("text");
}
SqlConnection connection = null;
try
{
connection = this.RequestConnection();
SqlCommand command = new SqlCommand(text, connection);
command.CommandType = CommandType.StoredProcedure;
command.Parameters.Add(parameter, SqlDbType.Int).Value = id;
return command.ExecuteReader();
}
catch (Exception e)
{
return null;
}
finally
{
this.ReleaseConnect(connection);
}
}
}
转载于:https://www.cnblogs.com/shilei/archive/2008/01/06/1028043.html
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