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KeleyiSQLHelper (v1.1)sql server操作类

包含对sql server数据库的各种操作方法,包括存储过程的操作
使用例子:http://hovertree.com/h/bjaf/69muengj.htm
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;

namespace HoverTree.DBTools
{
/// <summary>
/// Copyright (C) 2009-2016 hovertree.com
/// 柯乐义SQLServer访问类
/// 修改:何问起 修改时间 20160325
/// v 1.1
/// </summary>
public class KeleyiSQLHelper
{
/// <summary>
/// 修改连接串适应具体环境
/// http://keleyi.com/a/bjac/b0d180c6b6cfb356.htm
/// </summary>
public string connectionString;

public KeleyiSQLHelper()
{
connectionString = ConfigurationManager.ConnectionStrings["hovertreedb"].ConnectionString;
}
/// <summary>
/// 可以自定连接串 by 何问起
/// </summary>
/// <param name="conStr"></param>
public KeleyiSQLHelper(string conStr)
{
connectionString = conStr;
}

public static readonly KeleyiSQLHelper HoverTreeSql = new KeleyiSQLHelper();


#region 公用方法
public 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 bool Exists(string strSql, params SqlParameter[] cmdParms)
{
object obj = GetSingle(strSql, cmdParms);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
#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 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 (SqlException E)
{
connection.Close();
throw new Exception(E.Message);
}
}
}
}

/// <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 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[n].ToString();
if (strsql.Trim().Length > 1)
{
cmd.CommandText = strsql;
cmd.ExecuteNonQuery();
}
}
tx.Commit();
}
catch (SqlException 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">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 int ExecuteSql(string SQLString, string content)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(SQLString, connection);
SqlParameter myParameter = new SqlParameter("@content", SqlDbType.NText);
myParameter.Value = content;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (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(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 int ExecuteSqlInsertImg(string strSQL, byte[] fs)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(strSQL, connection);
SqlParameter myParameter = new SqlParameter("@fs", SqlDbType.Image);
myParameter.Value = fs;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (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)。
/// http://keleyi.com/nenu/net/
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <returns>查询结果(object)</returns>
public 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 (SqlException e)
{
connection.Close();
throw new Exception(e.Message);
}
}
}
}
/// <summary>
/// 执行查询语句,返回SqlDataReader
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>SqlDataReader</returns>
public 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 (SqlException e)
{
throw new Exception(e.Message);
}

}

/// <summary>
/// 执行查询语句,返回DataSet
/// http://keleyi.com/nenu/net/
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public 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 (SqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}

public DataTable QueryTable(string SQLString)
{
DataSet ds = new DataSet();
ds = Query(SQLString);
DataTable dt = new DataTable();
if (ds != null)
dt = ds.Tables[0];

return dt;
}

public DataRow QueryRow(string SQLString)
{
DataTable dt = QueryTable(SQLString);

if (dt != null)
if(dt.Rows.Count>0)
return dt.Rows[0];
return null;
}

#endregion
#region 执行带参数的SQL语句 http://keleyi.com/menu/csharp/
/// <summary>
/// 执行SQL语句,返回影响的记录数
/// http://keleyi.com/nenu/net/
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public 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 (SqlException E)
{
throw new Exception(E.Message);
}
}
}
}


/// <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 void ExecuteSqlTran(Hashtable SQLStringList)
{
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();
}
}
catch
{
trans.Rollback();
throw;
}
}
}
}


/// <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 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 (SqlException e)
{
throw new Exception(e.Message);
}
}
}
}

/// <summary>
/// 执行查询语句,返回SqlDataReader
/// http://keleyi.com/menu/csharp/
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>SqlDataReader</returns>
public 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 (SqlException e)
{
throw new Exception(e.Message);
}

}

/// <summary>
/// 执行查询语句,返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public 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 (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 柯乐义存储过程操作
/// <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 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;
}
//http://keleyi.com/menu/csharp/

/// <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 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;
}
}

public DataTable RunProcedureDataTable(string storedProcName, IDataParameter[] parameters)
{
DataSet m_ds = RunProcedure(storedProcName, parameters, "hovertree");

if (m_ds.Tables.Count < 1)
return null;

return m_ds.Tables[0];
}

public DataRow RunProcedureDataRow(string storedProcName, IDataParameter[] parameters)
{
DataTable m_dt = RunProcedureDataTable(storedProcName, parameters);

if (m_dt == null)
return null;
if (m_dt.Rows.Count < 1)
return null;

return m_dt.Rows[0];
}

/// <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 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>
/// 执行存储过程,返回" 返回值"
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>执行存储过程的返回值</returns>
public int RunProcedureWithReturn(string storedProcName, IDataParameter[] parameters)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
int result;
connection.Open();
SqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
//Connection.Close();
return result;
}
}


/// <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;
}


/// <summary>
/// 分页查询,by 何问起
/// 需配合存储过程P_HvtPage使用
/// </summary>
/// <param name="tableName"></param>
/// <param name="fieldList"></param>
/// <param name="primaryKey"></param>
/// <param name="wherePart"></param>
/// <param name="orderPart"></param>
/// <param name="sortType"></param>
/// <param name="pageSize"></param>
/// <param name="pageIndex"></param>
/// <param name="recorderCount"></param>
/// <param name="totalCount"></param>
/// <param name="totalPageCount"></param>
/// <returns></returns>
public DataTable HvtPageQuery(string tableName, string fieldList, string primaryKey, string wherePart, string orderPart
, int sortType,int pageSize, int pageIndex, int recorderCount, out int totalCount, out int totalPageCount)
{
IDataParameter[] m_parameters=new SqlParameter[11];

m_parameters[0] = new SqlParameter("@TableName", SqlDbType.VarChar, 200);
m_parameters[1] = new SqlParameter("@FieldList",SqlDbType.VarChar,2000);
m_parameters[2] = new SqlParameter("@PrimaryKey", SqlDbType.VarChar, 100);
m_parameters[3] = new SqlParameter("@Where", SqlDbType.VarChar, 2000);
m_parameters[4] = new SqlParameter("@Order", SqlDbType.VarChar, 1000);
m_parameters[5] = new SqlParameter("@SortType", SqlDbType.Int);
m_parameters[6] = new SqlParameter("@PageSize", SqlDbType.Int);
m_parameters[7] = new SqlParameter("@PageIndex", SqlDbType.Int);
m_parameters[8] = new SqlParameter("@RecorderCount", SqlDbType.Int);
m_parameters[9] = new SqlParameter("@TotalCount", SqlDbType.Int);
m_parameters[10] = new SqlParameter("@TotalPageCount", SqlDbType.Int);

m_parameters[0].Value = tableName;
m_parameters[1].Value = fieldList;
m_parameters[2].Value = primaryKey;
m_parameters[3].Value = wherePart;
m_parameters[4].Value = orderPart;
m_parameters[5].Value = sortType;
m_parameters[6].Value = pageSize;
m_parameters[7].Value = pageIndex;
m_parameters[8].Value = recorderCount;
m_parameters[9].Direction = ParameterDirection.Output;
m_parameters[10].Direction = ParameterDirection.Output;


DataTable m_dt= RunProcedure("P_HvtPage", m_parameters, "keleyi").Tables[0];
totalCount =Convert.ToInt32( m_parameters[9].Value);
totalPageCount = Convert.ToInt32(m_parameters[10].Value);

return m_dt;
}

#endregion
}
}