dbsql
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Collections;
using System.Data;
using System.IO;
using System.Web;
using System.Web.Util;
namespace FML.Utility
{
/// <summary>
/// Copyright (C) 2004-2008 LiTianPing
/// 数据访问基础类(基于SQLServer)
/// 用户可以修改满足自己项目的需要。
/// </summary>
public abstract class DbHelperSQL
{
//数据库连接字符串(web.config来配置)
// public static string connectionString = @"server=127.0.0.1;user id=sa;password=123456;database=msgData";//
public static string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
public DbHelperSQL()
{
}
#region 记录日志文件 LastModified:2009-6-8 by uEyoogoCommon
private static void writeLog(Exception ex, string ExecuteString,string strSql)
{
string LogFilename = VirtualPathUtility.ToAbsolute("~/") + "log/sqlErrorLog" + StrObj.FormatDatetime(DateTime.Now, 10) + ".txt";
string BR = Environment.NewLine, BRBR = string.Format("{0}{1}", Environment.NewLine, Environment.NewLine);
string errmsg = "";
try { errmsg = string.Format("{0}{1}{2}{3}", ex.Message, BR, ex.StackTrace, BR); }
catch { }
string log = string.Concat(new object[]{
"["
, ExecuteString
,"-"
, StrObj.FormatDatetime(DateTime.Now, 6)
,"]:"
,strSql
, BR
, errmsg
, BR
, HttpContext.Current.Request.RawUrl
, BRBR
});
try
{
IO.WriteTxtFile(LogFilename, log, true);
}
catch {}
}
#endregion
#region 公用方法
public static int GetMaxID(string FieldName, string TableName)
{
string strsql = "select max(" + FieldName + ")+1 from " + TableName;
object obj = GetSingle(strsql);
if (obj == null)
{
return 1;
}
else
{
return int.Parse(obj.ToString());
}
}
public static int GetRecordCount(string TableName, string strWhere)
{
string strSql = "select count(1) from " + TableName;
if (strWhere.Trim() != "")
{
strSql = strSql +strWhere;
}
object obj = GetSingle(strSql);
if (obj == null)
{
return -1;
}
else
{
return int.Parse(obj.ToString());
}
}
public static bool Exists(string strSql, params SqlParameter[] cmdParms)
{
object obj = GetSingle(strSql, cmdParms);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
//public static void writelog(string loginfo)
//{
// string FullFileName = ("d:\\log.txt");
// // string FullFileName = Session["RootPath"];
// FileStream fs = new FileStream(FullFileName, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.Read);
// fs.Seek(0, SeekOrigin.End);
// StreamWriter sw = new StreamWriter(fs);
// sw.WriteLine(loginfo);
// sw.Close();
// fs.Close();/**/
//}
#endregion
#region 执行简单SQL语句
/// <summary>
/// 执行SQL语句，返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string SQLString)
{
int rows = 0;
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand(SQLString, connection))
{
try
{
// writelog(SQLString);
connection.Open();
rows = cmd.ExecuteNonQuery();
}
catch (System.Data.SqlClient.SqlException E)
{
connection.Close();
writeLog(E, "ExecuteSql",SQLString);
//throw new Exception(E.Message);
}
}
}
return rows;
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">多条SQL语句</param>
public static bool ExecuteSqlTran(ArrayList SQLStringList)
{
bool success = false;
using (SqlConnection conn = new SqlConnection(connectionString))
{
conn.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
SqlTransaction tx = conn.BeginTransaction();
cmd.Transaction = tx;
try
{
for (int n = 0; n < SQLStringList.Count; n++)
{
string strsql = SQLStringList[n].ToString();
if (strsql.Trim().Length > 1)
{
cmd.CommandText = strsql;
cmd.ExecuteNonQuery();
}
}
tx.Commit();
success = true;
}
catch (System.Data.SqlClient.SqlException E)
{
tx.Rollback();
writeLog(E,"ExecuteSqlTran",SQLStringList.ToString());
//throw E;
}
finally
{
conn.Close();
}
}
return success;
}
/// <summary>
/// 执行带一个存储过程参数的的SQL语句。
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string SQLString, string content)
{
int rows = 0;
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();
rows = cmd.ExecuteNonQuery();
//return rows;
}
catch (System.Data.SqlClient.SqlException E)
{
writeLog(E,"ExecuteSql",SQLString);
//throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
return rows;
}
/// <summary>
/// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
/// </summary>
/// <param name="strSQL">SQL语句</param>
/// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
{
int rows = 0;
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();
rows = cmd.ExecuteNonQuery();
//return rows;
}
catch (System.Data.SqlClient.SqlException E)
{
writeLog(E, "ExecuteSqlInsertImg", strSQL);
//throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
return rows;
}
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <returns>查询结果（object）</returns>
public static object GetSingle(string SQLString)
{
object obj = null;
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand(SQLString, connection))
{
try
{
connection.Open();
obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
//return null;
obj = "";
}
//else
//{
// return obj;
//}
}
catch (System.Data.SqlClient.SqlException e)
{
connection.Close();
writeLog(e,"GetSingle",SQLString);
}
}
}
return obj;
}
/// <summary>
/// 执行查询语句，返回SqlDataReader
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>SqlDataReader</returns>
public static SqlDataReader ExecuteReader(string strSQL)
{
SqlDataReader myReader = null;
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand(strSQL, connection);
try
{
connection.Open();
myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
//return myReader;
}
catch (System.Data.SqlClient.SqlException e)
{
connection.Close();
writeLog(e, "SqlDataReader", strSQL);
}
return myReader;
}
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public static DataSet Query(string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
SqlDataAdapter command = new SqlDataAdapter(SQLString, connection);
command.Fill(ds);
}
catch (System.Data.SqlClient.SqlException ex)
{
connection.Close();
writeLog(ex,"Query",SQLString);
}
return ds;
}
}
#endregion
#region 执行带参数的SQL语句
/// <summary>
/// 执行SQL语句，返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string SQLString, params SqlParameter[] cmdParms)
{
int rows = 0;
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
}
catch (System.Data.SqlClient.SqlException E)
{
connection.Close();
writeLog(E, "ExecuteSql", SQLString);
}
}
}
return rows;
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的SqlParameter[]）</param>
public static bool ExecuteSqlTran(Hashtable SQLStringList)
{
bool success = false;
using (SqlConnection conn = new SqlConnection(connectionString))
{
conn.Open();
using (SqlTransaction trans = conn.BeginTransaction())
{
SqlCommand cmd = new SqlCommand();
try
{
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText = myDE.Key.ToString();
SqlParameter[] cmdParms = (SqlParameter[])myDE.Value;
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
}
trans.Commit();
success = true;
}
catch (System.Exception e)
{
success = false;
trans.Rollback();
writeLog(e, "ExecuteSqlTran", SQLStringList.ToString());
}
finally
{
conn.Close();
}
}
}
return success;
}
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <returns>查询结果（object）</returns>
public static object GetSingle(string SQLString, params SqlParameter[] cmdParms)
{
object obj = null;
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
obj = null;
}
}
catch (System.Data.SqlClient.SqlException e)
{
connection.Close();
writeLog(e, "GetSingle", SQLString);
}
}
}
return obj;
}
/// <summary>
/// 执行查询语句，返回SqlDataReader
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>SqlDataReader</returns>
public static SqlDataReader ExecuteReader(string SQLString, params SqlParameter[] cmdParms)
{
SqlDataReader myReader = null;
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand();
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
//return myReader;
}
catch (System.Data.SqlClient.SqlException e)
{
connection.Close();
writeLog(e, "ExecuteReader", SQLString);
}
return myReader;
}
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public static DataSet Query(string SQLString, params SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand();
cmd.CommandTimeout = 120;
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
using (SqlDataAdapter da = new SqlDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (System.Data.SqlClient.SqlException ex)
{
connection.Close();
writeLog(ex, "Query", SQLString);
}
return ds;
}
}
}
public static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, string cmdText, SqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = CommandType.Text;//cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
#endregion
#region 存储过程操作
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlDataReader</returns>
public static SqlDataReader RunProcedure(string storedProcName, IDataParameter[] parameters)
{
SqlConnection connection = new SqlConnection(connectionString);
SqlDataReader returnReader = null;
connection.Open();
SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.CommandType = CommandType.StoredProcedure;
try
{
returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception ex)
{
connection.Close();
writeLog(ex, "RunProcedure", storedProcName);
}
return returnReader;
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="tableName">DataSet结果中的表名</param>
/// <returns>DataSet</returns>
public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
DataSet dataSet = new DataSet();
connection.Open();
SqlDataAdapter sqlDA = new SqlDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
sqlDA.Fill(dataSet, tableName);
//connection.Close();
return dataSet;
}
}
/// <summary>
/// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand</returns>
private static SqlCommand BuildQueryCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = new SqlCommand(storedProcName, connection);
command.CommandType = CommandType.StoredProcedure;
foreach (SqlParameter parameter in parameters)
{
command.Parameters.Add(parameter);
}
return command;
}
/// <summary>
/// 执行存储过程，返回影响的行数
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="rowsAffected">影响的行数</param>
/// <returns></returns>
public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
int result;
connection.Open();
SqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
//Connection.Close();
return result;
}
}
//存储过程操作
public static bool ExecuteProcedure(string storedProcName, IDataParameter[] parameters)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
try
{
connection.Open();
SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters); ;
command.ExecuteNonQuery();
return true;
}
catch (SqlException ex)
{
connection.Close();
writeLog(ex, "ExecuteProcedure", storedProcName);
return false;
}
}
}
/// <summary>
/// 创建 SqlCommand 对象实例(用来返回一个整数值)
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand 对象实例</returns>
private static SqlCommand BuildIntCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.Parameters.Add(new SqlParameter("ReturnValue",
SqlDbType.Int, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
return command;
}
#endregion
#region 自定义 存储过程操作
/// <summary>
/// 创建 SqlCommand 对象实例
/// by gaoll 2007-05-16
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand 对象实例</returns>
private static SqlCommand BuildStringCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
return command;
}
/// <summary>
/// 执行存储过程，返回return值
/// by crl 2007-05-16
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns></returns>
public static DataSet QueryProcedure(string storedProcName, IDataParameter[] parameters)
{
DataSet ds = new DataSet();
try
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
SqlCommand command = BuildStringCommand(connection, storedProcName, parameters);
command.ExecuteNonQuery();
SqlDataAdapter dp = new SqlDataAdapter(command);
ds = new DataSet();
dp.Fill(ds);
return ds;
}
}
catch (SqlException ex)
{
writeLog(ex, "QueryProcedure", storedProcName);
return ds;
}
}
#endregion 自定义 存储过程操作
}
}