数据访问基础类(基于MYSQL)
/// <summary>
/// Copyright (C) 2006-2010 Kolee
/// 数据访问基础类(基于MYSQL)
/// </summary>
public class MySqlHelper2
{
public MySqlHelper2()
{
}
#region 公用方法
public static int GetMaxId(string fieldName, string tableName, string connStr)
{
string strsql = "select max(" + fieldName + ")+1 from " + tableName;
object obj = GetSingle(strsql, connStr);
if (obj == null)
return 1;
return int.Parse(obj.ToString());
}
public static bool Exists(string sqlStr, string connStr, params MySqlParameter[] cmdParms)
{
object obj = GetSingle(sqlStr, connStr, cmdParms);
int cmdresult;
if ((Equals(obj, null)) || (Equals(obj, DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
return false;
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="sqlStr">SQL语句</param>
/// <param name="connStr"></param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string sqlStr, string connStr)
{
using (var connection = new MySqlConnection(connStr))
{
using (var cmd = new MySqlCommand(sqlStr, connection))
{
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (Exception E)
{
connection.Close();
throw E;
}
}
}
}
/// <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>
/// <param name="connStr"></param>
public static void ExecuteSqlTran(ArrayList sqlStringList, string connStr)
{
using (var conn = new MySqlConnection(connStr))
{
conn.Open();
var cmd = new MySqlCommand();
cmd.Connection = conn;
MySqlTransaction 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 (Exception e)
{
tx.Rollback();
throw e;
}
}
}
/// <summary>
/// 执行带一个存储过程参数的的SQL语句。
/// </summary>
/// <param name="sqlStr">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>
/// <param name="connStr"></param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string sqlStr, string content, string connStr)
{
using (var connection = new MySqlConnection(connStr))
{
var cmd = new MySqlCommand(sqlStr, connection);
var myParameter = new System.Data.SqlClient.SqlParameter("@content", SqlDbType.NText) { Value = content };
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (Exception E)
{
throw E;
}
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="sqlStr">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>
/// <param name="connStr"></param>
/// <returns>影响的记录数</returns>
public static int ExecuteSqlInsertImg(string sqlStr, byte[] fs, string connStr)
{
using (var connection = new MySqlConnection(connStr))
{
var cmd = new MySqlCommand(sqlStr, connection);
var myParameter = new System.Data.SqlClient.SqlParameter("@fs", SqlDbType.Image) { Value = fs };
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (Exception E)
{
throw E;
}
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="sqlStr">计算查询结果语句</param>
/// <param name="connStr"></param>
/// <returns>查询结果（object）</returns>
public static object GetSingle(string sqlStr, string connStr)
{
using (var connection = new MySqlConnection(connStr))
{
using (var cmd = new MySqlCommand(sqlStr, connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Equals(obj, null)) || (Equals(obj, DBNull.Value)))
{
return null;
}
return obj;
}
catch (Exception e)
{
connection.Close();
throw e;
}
}
}
}
/// <summary>
/// 执行查询语句，返回SqlDataReader
/// </summary>
/// <param name="sqlStr">查询语句</param>
/// <param name="sqlStr"></param>
/// <param name="connStr"></param>
/// <returns>SqlDataReader</returns>
public static MySqlDataReader ExecuteReader(string sqlStr, string connStr)
{
var connection = new MySqlConnection(connStr);
var cmd = new MySqlCommand(sqlStr, connection);
try
{
connection.Open();
MySqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return myReader;
}
catch (Exception e)
{
throw e;
}
finally
{
connection.Close();
}
}
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="sqlString">查询语句</param>
/// <param name="connStr"></param>
/// <returns>DataSet</returns>
public static DataSet Query(string sqlString, string connStr)
{
using (var connection = new MySqlConnection(connStr))
{
var ds = new DataSet();
try
{
connection.Open();
var command = new MySqlDataAdapter(sqlString, connection);
command.Fill(ds, "ds");
}
catch (Exception ex)
{
throw ex;
}
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="sqlStr">SQL语句</param>
/// <param name="cmdParms"></param>
/// <param name="connStr"></param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string sqlStr, string connStr, params MySqlParameter[] cmdParms)
{
using (var connection = new MySqlConnection(connStr))
{
using (var cmd = new MySqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, sqlStr, cmdParms);
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (Exception e)
{
throw e;
}
}
}
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="sqlStrList">SQL语句的哈希表（key为sql语句，value是该语句的SqlParameter[]）</param>
/// <param name="connStr"></param>
public static void ExecuteSqlTran(Hashtable sqlStrList, string connStr)
{
using (var conn = new MySqlConnection(connStr))
{
conn.Open();
using (MySqlTransaction trans = conn.BeginTransaction())
{
var cmd = new MySqlCommand();
try
{
//循环
foreach (DictionaryEntry myDe in sqlStrList)
{
string cmdText = myDe.Key.ToString();
var cmdParms = (MySqlParameter[])myDe.Value;
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
trans.Commit();
}
}
catch (Exception ex)
{
trans.Rollback();
throw ex;
}
}
}
}
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name="sqlStr">计算查询结果语句</param>
/// <param name="connStr"></param>
/// <param name="cmdParms"></param>
/// <returns>查询结果（object）</returns>
public static object GetSingle(string sqlStr, string connStr, params MySqlParameter[] cmdParms)
{
using (var connection = new MySqlConnection(connStr))
{
using (var cmd = new MySqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, sqlStr, cmdParms);
object obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
if ((Equals(obj, null)) || (Equals(obj, DBNull.Value)))
{
return null;
}
return obj;
}
catch (Exception e)
{
throw e;
}
}
}
}
/// <summary>
/// 执行查询语句，返回SqlDataReader
/// </summary>
/// <param name="sqlStr">查询语句</param>
/// <param name="connStr"></param>
/// <param name="cmdParms"></param>
/// <returns>SqlDataReader</returns>
public static MySqlDataReader ExecuteReader(string sqlStr, string connStr, params MySqlParameter[] cmdParms)
{
var connection = new MySqlConnection(connStr);
var cmd = new MySqlCommand();
try
{
PrepareCommand(cmd, connection, null, sqlStr, cmdParms);
MySqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return myReader;
}
catch (Exception e)
{
throw e;
}
finally
{
connection.Close();
}
}
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="sqlStr">查询语句</param>
/// <param name="connStr"></param>
/// <param name="cmdParms"></param>
/// <returns>DataSet</returns>
public static DataSet Query(string sqlStr, string connStr, params MySqlParameter[] cmdParms)
{
using (var connection = new MySqlConnection(connStr))
{
var cmd = new MySqlCommand();
PrepareCommand(cmd, connection, null, sqlStr, cmdParms);
using (var da = new MySqlDataAdapter(cmd))
{
var ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (Exception ex)
{
throw ex;
}
return ds;
}
}
}
private static void PrepareCommand(MySqlCommand cmd, MySqlConnection conn, MySqlTransaction trans, string cmdText, MySqlParameter[] 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 (MySqlParameter 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="connStr"></param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlDataReader</returns>
public static MySqlDataReader RunProcedure(string storedProcName, string connStr, IDataParameter[] parameters)
{
var connection = new MySqlConnection(connStr);
MySqlDataReader returnReader;
connection.Open();
MySqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.CommandType = CommandType.StoredProcedure;
returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);
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, string connStr, IDataParameter[] parameters, string tableName)
{
using (var connection = new MySqlConnection(connStr))
{
var dataSet = new DataSet();
connection.Open();
var sqlDa = new MySqlDataAdapter();
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 MySqlCommand BuildQueryCommand(MySqlConnection connection, string storedProcName, IEnumerable<IDataParameter> parameters)
{
var command = new MySqlCommand(storedProcName, connection) {CommandType = CommandType.StoredProcedure};
foreach (MySqlParameter 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="connStr"></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, string connStr, IDataParameter[] parameters, out int rowsAffected)
{
using (var connection = new MySqlConnection(connStr))
{
int result;
connection.Open();
MySqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
rowsAffected = 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="connection"></param>
/// <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 MySqlCommand BuildIntCommand(MySqlConnection connection, string storedProcName, IEnumerable<IDataParameter> parameters)
{
MySqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.Parameters.Add(new MySqlParameter("ReturnValue",
MySqlDbType.Int32, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
return command;
}
#endregion
}
/// Copyright (C) 2006-2010 Kolee
/// 数据访问基础类(基于MYSQL)
/// </summary>
public class MySqlHelper2
{
public MySqlHelper2()
{
}
#region 公用方法
public static int GetMaxId(string fieldName, string tableName, string connStr)
{
string strsql = "select max(" + fieldName + ")+1 from " + tableName;
object obj = GetSingle(strsql, connStr);
if (obj == null)
return 1;
return int.Parse(obj.ToString());
}
public static bool Exists(string sqlStr, string connStr, params MySqlParameter[] cmdParms)
{
object obj = GetSingle(sqlStr, connStr, cmdParms);
int cmdresult;
if ((Equals(obj, null)) || (Equals(obj, DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
return false;
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="sqlStr">SQL语句</param>
/// <param name="connStr"></param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string sqlStr, string connStr)
{
using (var connection = new MySqlConnection(connStr))
{
using (var cmd = new MySqlCommand(sqlStr, connection))
{
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (Exception E)
{
connection.Close();
throw E;
}
}
}
}
/// <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>
/// <param name="connStr"></param>
public static void ExecuteSqlTran(ArrayList sqlStringList, string connStr)
{
using (var conn = new MySqlConnection(connStr))
{
conn.Open();
var cmd = new MySqlCommand();
cmd.Connection = conn;
MySqlTransaction 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 (Exception e)
{
tx.Rollback();
throw e;
}
}
}
/// <summary>
/// 执行带一个存储过程参数的的SQL语句。
/// </summary>
/// <param name="sqlStr">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>
/// <param name="connStr"></param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string sqlStr, string content, string connStr)
{
using (var connection = new MySqlConnection(connStr))
{
var cmd = new MySqlCommand(sqlStr, connection);
var myParameter = new System.Data.SqlClient.SqlParameter("@content", SqlDbType.NText) { Value = content };
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (Exception E)
{
throw E;
}
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="sqlStr">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>
/// <param name="connStr"></param>
/// <returns>影响的记录数</returns>
public static int ExecuteSqlInsertImg(string sqlStr, byte[] fs, string connStr)
{
using (var connection = new MySqlConnection(connStr))
{
var cmd = new MySqlCommand(sqlStr, connection);
var myParameter = new System.Data.SqlClient.SqlParameter("@fs", SqlDbType.Image) { Value = fs };
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (Exception E)
{
throw E;
}
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="sqlStr">计算查询结果语句</param>
/// <param name="connStr"></param>
/// <returns>查询结果（object）</returns>
public static object GetSingle(string sqlStr, string connStr)
{
using (var connection = new MySqlConnection(connStr))
{
using (var cmd = new MySqlCommand(sqlStr, connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Equals(obj, null)) || (Equals(obj, DBNull.Value)))
{
return null;
}
return obj;
}
catch (Exception e)
{
connection.Close();
throw e;
}
}
}
}
/// <summary>
/// 执行查询语句，返回SqlDataReader
/// </summary>
/// <param name="sqlStr">查询语句</param>
/// <param name="sqlStr"></param>
/// <param name="connStr"></param>
/// <returns>SqlDataReader</returns>
public static MySqlDataReader ExecuteReader(string sqlStr, string connStr)
{
var connection = new MySqlConnection(connStr);
var cmd = new MySqlCommand(sqlStr, connection);
try
{
connection.Open();
MySqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return myReader;
}
catch (Exception e)
{
throw e;
}
finally
{
connection.Close();
}
}
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="sqlString">查询语句</param>
/// <param name="connStr"></param>
/// <returns>DataSet</returns>
public static DataSet Query(string sqlString, string connStr)
{
using (var connection = new MySqlConnection(connStr))
{
var ds = new DataSet();
try
{
connection.Open();
var command = new MySqlDataAdapter(sqlString, connection);
command.Fill(ds, "ds");
}
catch (Exception ex)
{
throw ex;
}
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="sqlStr">SQL语句</param>
/// <param name="cmdParms"></param>
/// <param name="connStr"></param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string sqlStr, string connStr, params MySqlParameter[] cmdParms)
{
using (var connection = new MySqlConnection(connStr))
{
using (var cmd = new MySqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, sqlStr, cmdParms);
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (Exception e)
{
throw e;
}
}
}
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="sqlStrList">SQL语句的哈希表（key为sql语句，value是该语句的SqlParameter[]）</param>
/// <param name="connStr"></param>
public static void ExecuteSqlTran(Hashtable sqlStrList, string connStr)
{
using (var conn = new MySqlConnection(connStr))
{
conn.Open();
using (MySqlTransaction trans = conn.BeginTransaction())
{
var cmd = new MySqlCommand();
try
{
//循环
foreach (DictionaryEntry myDe in sqlStrList)
{
string cmdText = myDe.Key.ToString();
var cmdParms = (MySqlParameter[])myDe.Value;
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
trans.Commit();
}
}
catch (Exception ex)
{
trans.Rollback();
throw ex;
}
}
}
}
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）。
/// </summary>
/// <param name="sqlStr">计算查询结果语句</param>
/// <param name="connStr"></param>
/// <param name="cmdParms"></param>
/// <returns>查询结果（object）</returns>
public static object GetSingle(string sqlStr, string connStr, params MySqlParameter[] cmdParms)
{
using (var connection = new MySqlConnection(connStr))
{
using (var cmd = new MySqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, sqlStr, cmdParms);
object obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
if ((Equals(obj, null)) || (Equals(obj, DBNull.Value)))
{
return null;
}
return obj;
}
catch (Exception e)
{
throw e;
}
}
}
}
/// <summary>
/// 执行查询语句，返回SqlDataReader
/// </summary>
/// <param name="sqlStr">查询语句</param>
/// <param name="connStr"></param>
/// <param name="cmdParms"></param>
/// <returns>SqlDataReader</returns>
public static MySqlDataReader ExecuteReader(string sqlStr, string connStr, params MySqlParameter[] cmdParms)
{
var connection = new MySqlConnection(connStr);
var cmd = new MySqlCommand();
try
{
PrepareCommand(cmd, connection, null, sqlStr, cmdParms);
MySqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return myReader;
}
catch (Exception e)
{
throw e;
}
finally
{
connection.Close();
}
}
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="sqlStr">查询语句</param>
/// <param name="connStr"></param>
/// <param name="cmdParms"></param>
/// <returns>DataSet</returns>
public static DataSet Query(string sqlStr, string connStr, params MySqlParameter[] cmdParms)
{
using (var connection = new MySqlConnection(connStr))
{
var cmd = new MySqlCommand();
PrepareCommand(cmd, connection, null, sqlStr, cmdParms);
using (var da = new MySqlDataAdapter(cmd))
{
var ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (Exception ex)
{
throw ex;
}
return ds;
}
}
}
private static void PrepareCommand(MySqlCommand cmd, MySqlConnection conn, MySqlTransaction trans, string cmdText, MySqlParameter[] 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 (MySqlParameter 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="connStr"></param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlDataReader</returns>
public static MySqlDataReader RunProcedure(string storedProcName, string connStr, IDataParameter[] parameters)
{
var connection = new MySqlConnection(connStr);
MySqlDataReader returnReader;
connection.Open();
MySqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.CommandType = CommandType.StoredProcedure;
returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);
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, string connStr, IDataParameter[] parameters, string tableName)
{
using (var connection = new MySqlConnection(connStr))
{
var dataSet = new DataSet();
connection.Open();
var sqlDa = new MySqlDataAdapter();
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 MySqlCommand BuildQueryCommand(MySqlConnection connection, string storedProcName, IEnumerable<IDataParameter> parameters)
{
var command = new MySqlCommand(storedProcName, connection) {CommandType = CommandType.StoredProcedure};
foreach (MySqlParameter 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="connStr"></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, string connStr, IDataParameter[] parameters, out int rowsAffected)
{
using (var connection = new MySqlConnection(connStr))
{
int result;
connection.Open();
MySqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
rowsAffected = 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="connection"></param>
/// <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 MySqlCommand BuildIntCommand(MySqlConnection connection, string storedProcName, IEnumerable<IDataParameter> parameters)
{
MySqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.Parameters.Add(new MySqlParameter("ReturnValue",
MySqlDbType.Int32, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
return command;
}
#endregion
}
