using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
namespace Utility
{
public abstract class SqlHelper
{
protected static string connectionString = ConfigurationSettings.AppSettings["ConnectionString"];
#region 執(zhí)行簡(jiǎn)單SQL語(yǔ)句
/// <summary>
/// 執(zhí)行SQL語(yǔ)句，返回影響的記錄數(shù)
/// </summary>
/// <param name="SQLString">SQL語(yǔ)句</param>
/// <returns>影響的記錄數(shù)</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)
{
connection.Close();
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 執(zhí)行多條SQL語(yǔ)句，實(shí)現(xiàn)數(shù)據(jù)庫(kù)事務(wù)。
/// </summary>
/// <param name="SQLStringList">多條SQL語(yǔ)句</param>
public static void ExecuteSqlTran(ArrayList SQLStringList)
{
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.ToString();
if (strsql.Trim().Length > 1)
{
cmd.CommandText = strsql;
cmd.ExecuteNonQuery();
}
}
tx.Commit();
}
catch (System.Data.SqlClient.SqlException E)
{
tx.Rollback();
throw new Exception(E.Message);
}
}
}
/// <summary>
/// 執(zhí)行帶一個(gè)存儲(chǔ)過(guò)程參數(shù)的的SQL語(yǔ)句。
/// </summary>
/// <param name="SQLString">SQL語(yǔ)句</param>
/// <param name="content">參數(shù)內(nèi)容,比如一個(gè)字段是格式復(fù)雜的文章，有特殊符號(hào)，可以通過(guò)這個(gè)方式添加</param>
/// <returns>影響的記錄數(shù)</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>
/// 向數(shù)據(jù)庫(kù)里插入圖像格式的字段(和上面情況類(lèi)似的另一種實(shí)例)
/// </summary>
/// <param name="strSQL">SQL語(yǔ)句</param>
/// <param name="fs">圖像字節(jié),數(shù)據(jù)庫(kù)的字段類(lèi)型為image的情況</param>
/// <returns>影響的記錄數(shù)</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>
/// 執(zhí)行一條計(jì)算查詢結(jié)果語(yǔ)句，返回查詢結(jié)果（object）。
/// </summary>
/// <param name="SQLString">計(jì)算查詢結(jié)果語(yǔ)句</param>
/// <returns>查詢結(jié)果（object）</returns>
public static object GetSingle(string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (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)
{
connection.Close();
throw new Exception(e.Message);
}
}
}
}
/// <summary>
/// 執(zhí)行查詢語(yǔ)句，返回SqlDataReader
/// </summary>
/// <param name="strSQL">查詢語(yǔ)句</param>
/// <returns>SqlDataReader</returns>
public static SqlDataReader ExecuteReader(string strSQL)
{
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand(strSQL, connection);
try
{
connection.Open();
SqlDataReader myReader = cmd.ExecuteReader();
return myReader;
}
catch (System.Data.SqlClient.SqlException e)
{
throw new Exception(e.Message);
}
}
/// <summary>
/// 執(zhí)行查詢語(yǔ)句，返回DataSet
/// </summary>
/// <param name="SQLString">查詢語(yǔ)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, "ds");
}
catch (System.Data.SqlClient.SqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
#endregion
#region 執(zhí)行帶參數(shù)的SQL語(yǔ)句
/// <summary>
/// 執(zhí)行SQL語(yǔ)句，返回影響的記錄數(shù)
/// </summary>
/// <param name="SQLString">SQL語(yǔ)句</param>
/// <returns>影響的記錄數(shù)</returns>
public static int ExecuteSql(string SQLString, params SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (System.Data.SqlClient.SqlException E)
{
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 執(zhí)行多條SQL語(yǔ)句，實(shí)現(xiàn)數(shù)據(jù)庫(kù)事務(wù)。
/// </summary>
/// <param name="SQLStringList">SQL語(yǔ)句的哈希表（key為sql語(yǔ)句，value是該語(yǔ)句的SqlParameter[]）</param>
public static void ExecuteSqlTran(Hashtable SQLStringList)
{
using (SqlConnection conn = new SqlConnection(connectionString))
{
conn.Open();
using (SqlTransaction trans = conn.BeginTransaction())
{
SqlCommand cmd = new SqlCommand();
try
{
//循環(huán)
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();
}
}
catch
{
trans.Rollback();
throw;
}
}
}
}
/// <summary>
/// 執(zhí)行一條計(jì)算查詢結(jié)果語(yǔ)句，返回查詢結(jié)果（object）。
/// </summary>
/// <param name="SQLString">計(jì)算查詢結(jié)果語(yǔ)句</param>
/// <returns>查詢結(jié)果（object）</returns>
public static object GetSingle(string SQLString, params SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
object obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
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);
}
}
}
}
/// <summary>
/// 執(zhí)行查詢語(yǔ)句，返回SqlDataReader
/// </summary>
/// <param name="strSQL">查詢語(yǔ)句</param>
/// <returns>SqlDataReader</returns>
public static SqlDataReader ExecuteReader(string SQLString, params SqlParameter[] cmdParms)
{
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand();
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
SqlDataReader myReader = cmd.ExecuteReader();
cmd.Parameters.Clear();
return myReader;
}
catch (System.Data.SqlClient.SqlException e)
{
throw new Exception(e.Message);
}
}
/// <summary>
/// 執(zhí)行查詢語(yǔ)句，返回DataSet
/// </summary>
/// <param name="SQLString">查詢語(yǔ)句</param>
/// <returns>DataSet</returns>
public static DataSet Query(string SQLString, params SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand();
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)
{
throw new Exception(ex.Message);
}
return ds;
}
}
}
private 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 存儲(chǔ)過(guò)程操作
/// <summary>
/// 執(zhí)行存儲(chǔ)過(guò)程
/// </summary>
/// <param name="storedProcName">存儲(chǔ)過(guò)程名</param>
/// <param name="parameters">存儲(chǔ)過(guò)程參數(shù)</param>
/// <returns>SqlDataReader</returns>
public static SqlDataReader RunProcedure(string storedProcName, IDataParameter[] parameters)
{
SqlConnection connection = new SqlConnection(connectionString);
SqlDataReader returnReader;
connection.Open();
SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.CommandType = CommandType.StoredProcedure;
returnReader = command.ExecuteReader();
return returnReader;
}
/// <summary>
/// 執(zhí)行存儲(chǔ)過(guò)程
/// </summary>
/// <param name="storedProcName">存儲(chǔ)過(guò)程名</param>
/// <param name="parameters">存儲(chǔ)過(guò)程參數(shù)</param>
/// <param name="tableName">DataSet結(jié)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>
/// 構(gòu)建 SqlCommand 對(duì)象(用來(lái)返回一個(gè)結(jié)果集，而不是一個(gè)整數(shù)值)
/// </summary>
/// <param name="connection">數(shù)據(jù)庫(kù)連接</param>
/// <param name="storedProcName">存儲(chǔ)過(guò)程名</param>
/// <param name="parameters">存儲(chǔ)過(guò)程參數(shù)</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>
/// 執(zhí)行存儲(chǔ)過(guò)程，返回影響的行數(shù)
/// </summary>
/// <param name="storedProcName">存儲(chǔ)過(guò)程名</param>
/// <param name="parameters">存儲(chǔ)過(guò)程參數(shù)</param>
/// <param name="rowsAffected">影響的行數(shù)</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;
}
}
/// <summary>
/// 創(chuàng)建 SqlCommand 對(duì)象實(shí)例(用來(lái)返回一個(gè)整數(shù)值)
/// </summary>
/// <param name="storedProcName">存儲(chǔ)過(guò)程名</param>
/// <param name="parameters">存儲(chǔ)過(guò)程參數(shù)</param>
/// <returns>SqlCommand 對(duì)象實(shí)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
public static int GetMaxID(string FieldName, string TableName)
{
string strsql = "select max(" + FieldName + ")+1 from " + TableName;
object obj = SqlHelper.GetSingle(strsql);
if (obj == null)
{
return 1;
}
else
{
return int.Parse(obj.ToString());
}
}
}
}
本文來(lái)自CSDN博客，轉(zhuǎn)載請(qǐng)標(biāo)明出處：http://blog.csdn.net/yunduan/archive/2009/03/20/4006412.aspx
