封装的ADO.NET对数据库操作经典类
2013年12月12日
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using System;
using System.Collections;
using System.Collections.Specialized;
using System.Runtime.Remoting.Messaging;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
Namespace LTPnamespace LTP.SQLServerDAL
{
/// <summary>
/// ADO.NET数据库操作基础类。
/// </summary>
public abstract Class DbManagerSQLclass DbManagerSQL
{
//数据库连接字符串
protected static string connectionString = ConfigurationSettings.AppSettings['ConnectionString'];
public DbManagerSQL()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
/// <summary>
/// 执行SQL语句，返回影响的记录数
/// </summary>
/// <param name='SQLString'></param>
/// <returns></returns>
public static int ExecuteSql(string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand(SQLString,connection))
{
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(System.Data.SqlClient.SqlException E)
{
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 执行两条SQL语句，实现数据库事务。
/// </summary>
/// <param name='SQLString1'></param>
/// <param name='SQLString2'></param>
public static void ExecuteSqlTran(string SQLString1,string SQLString2)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection=connection;
SqlTransaction tx=connection.BeginTransaction();
cmd.Transaction=tx;
try
{
cmd.CommandText=SQLString1;
cmd.ExecuteNonQuery();
cmd.CommandText=SQLString2;
cmd.ExecuteNonQuery();
tx.Commit();
}
catch(System.Data.SqlClient.SqlException E)
{
tx.Rollback();
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务，每条语句以“;”分割。
/// </summary>
/// <param name='SQLStringList'></param>
public static void ExecuteSqlTran(string SQLStringList)
{
using (OdbcConnection conn = new OdbcConnection(connectionString))
{
conn.Open();
OdbcCommand cmd = new OdbcCommand();
cmd.Connection=conn;
OdbcTransaction tx=conn.BeginTransaction();
cmd.Transaction=tx;
try
{
string [] split= SQLStringList.Split(new Char [] { ';'});
foreach (string strsql in split)
{
if (strsql.Trim()!='')
{
cmd.CommandText=strsql;
cmd.ExecuteNonQuery();
}
}
tx.Commit();
}
catch(System.Data.Odbc.OdbcException E)
{
tx.Rollback();
throw new Exception(E.Message);
}
}
}
/// <summary>
/// 执行带一个存储过程参数的的SQL语句。
/// </summary>
/// <param name='SQLString'></param>
/// <param name='content'></param>
/// <returns></returns>
public static int ExecuteSql(string SQLString,string content)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(SQLString,connection);
System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter ( '@content', SqlDbType.NText);
myParameter.Value = content ;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(System.Data.SqlClient.SqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 向数据库里插入图像格式的字段
/// </summary>
/// <param name='strSQL'></param>
/// <param name='fs'></param>
/// <returns></returns>
public static int ExecuteSqlInsertImg(string strSQL,byte[] fs)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(strSQL,connection);
System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter ( '@fs', SqlDbType.Image);
myParameter.Value = fs ;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(System.Data.SqlClient.SqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（整数）。
/// </summary>
/// <param name='strSQL'></param>
/// <returns></returns>
public static int GetCount(string strSQL)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(strSQL,connection);
try
{
connection.Open();
SqlDataReader result = cmd.ExecuteReader();
int i=0;
while(result.Read())
{
i=result.GetInt32(0);
}
result.Close();
return i;
}
catch(System.Data.SqlClient.SqlException e)
{
throw new Exception(e.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name='SQLString'></param>
/// <returns></returns>
public static object GetSingle(string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(SQLString,connection);
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if((Object.Equals(obj,null))||(Object.Equals(obj,System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch(System.Data.SqlClient.SqlException e)
{
throw new Exception(e.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 执行查询语句，返回SqlDataReader
/// </summary>
/// <param name='strSQL'></param>
/// <returns></returns>
public static SqlDataReader ExecuteReader(string strSQL)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(strSQL,connection);
SqlDataReader myReader;
try
{
connection.Open();
myReader = cmd.ExecuteReader();
return myReader;
}
catch(System.Data.SqlClient.SqlException e)
{
throw new Exception(e.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name='SQLString'></param>
/// <returns></returns>
public static DataSet Query(