使用MySql.Data.dll，它.Net访问MySQL数据库的一个驱动 下载
DbHelperMySql.CS
using System;
using System.Collections;
using System.Collections.Specialized;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using MySql.Data.Types;
using MySql.Data.MySqlClient;
///
/// C#操作MYSQL数据库基类
///
public abstract class DbHelperMySql
{
//数据库连接字符串(web.config来配置)
public static string connectionString = ConfigurationManager.AppSettings["MyString"];
public DbHelperMySql()
{}
#region 执行简单SQL语句
///
/// 执行SQL语句，返回影响的记录数
///
/// SQL语句
/// 影响的记录数
public static int ExecuteSql(string SQLString)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
{
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (MySqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
}
///
/// 执行SQL语句，设置命令的执行等待时间
///
///
///
///
public static int ExecuteSqlByTime(string SQLString, int Times)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
{
try
{
connection.Open();
cmd.CommandTimeout = Times;
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (MySqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
}
///
/// 执行多条SQL语句，实现数据库事务。
///
/// 多条SQL语句
public static void ExecuteSqlTran(ArrayList SQLStringList)
{
using (MySqlConnection conn = new MySqlConnection(connectionString))
{
conn.Open();
MySqlCommand 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 (MySqlException E)
{
tx.Rollback();
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
conn.Close();
}
}
}
///
/// 执行带一个存储过程参数的的SQL语句。
///
/// SQL语句
/// 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
/// 影响的记录数
public static int ExecuteSql(string SQLString, string content)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand(SQLString, connection);
MySqlParameter myParameter = new MySqlParameter("@content", MySqlDbType.Text);
myParameter.Value = content;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (MySqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
///
/// 执行带一个存储过程参数的的SQL语句。
///
/// SQL语句
/// 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
/// 影响的记录数
public static object ExecuteSqlGet(string SQLString, string content)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand(SQLString, connection);
MySqlParameter myParameter = new MySqlParameter("@content", MySqlDbType.Text);
myParameter.Value = content;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (MySqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
///
/// 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)
///
/// SQL语句
/// 图像字节,数据库的字段类型为image的情况
/// 影响的记录数
public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand(strSQL, connection);
MySqlParameter myParameter = new MySqlParameter("@fs", MySqlDbType.Binary);
myParameter.Value = fs;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (MySqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
///
/// 执行一条计算查询结果语句，返回查询结果(object)。
///
/// 计算查询结果语句
/// 查询结果(object)
public static object GetSingle(string SQLString)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand(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 (MySqlException e)
{
throw new Exception(e.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
}
///
/// 执行查询语句，返回MySqlDataReader(使用该方法切记要手工关闭MySqlDataReader和连接)
///
/// 查询语句
/// MySqlDataReader
public static MySqlDataReader ExecuteReader(string strSQL)
{
MySqlConnection connection = new MySqlConnection(connectionString);
MySqlCommand cmd = new MySqlCommand(strSQL, connection);
try
{
connection.Open();
MySqlDataReader myReader = cmd.ExecuteReader();
return myReader;
}
catch (MySqlException e)
{
throw new Exception(e.Message);
}
//finally //不能在此关闭，否则，返回的对象将无法使用
//{
// cmd.Dispose();
// connection.Close();
//}
}
///
/// 执行查询语句，返回DataSet
///
/// 查询语句
/// DataSet
public static DataSet Query(string SQLString)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
MySqlDataAdapter da = new MySqlDataAdapter(SQLString, connection);
da.Fill(ds);
}
catch (MySqlException ex)
{
connection.Close();
throw new Exception(ex.Message);
}
finally
{
connection.Close();
}
return ds;
}
}
///
/// 执行查询语句，返回DataSet,设置命令的执行等待时间
///
///
///
///
public static DataSet Query(string SQLString, int Times)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
MySqlDataAdapter command = new MySqlDataAdapter(SQLString, connection);
command.SelectCommand.CommandTimeout = Times;
command.Fill(ds, "ds");
}
catch (MySqlException ex)
{
throw new Exception(ex.Message);
}
finally
{
connection.Close();
}
return ds;
}
}
///
/// 获取SQL查询记录条数
///
/// SQL语句
///
public static int GetRowsNum(string SQLString)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
MySqlDataAdapter command = new MySqlDataAdapter(SQLString, connection);
command.Fill(ds, "ds");
return ds.Tables[0].Rows.Count;
}
catch (MySqlException ex)
{
throw new Exception(ex.Message);
}
finally
{
connection.Close();
}
}
}
#endregion
#region 执行带参数的SQL语句
///
/// 执行SQL语句，返回影响的记录数
///
/// SQL语句
/// 影响的记录数
public static int ExecuteSql(string SQLString, params Object[] cmdParms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (MySqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
}
///
/// 执行多条SQL语句，实现数据库事务。
///
/// SQL语句的哈希表(key为sql语句，value是该语句的 Object[])
public static void ExecuteSqlTran(Hashtable SQLStringList)
{
using (MySqlConnection conn = new MySqlConnection(connectionString))
{
conn.Open();
using (MySqlTransaction trans = conn.BeginTransaction())
{
MySqlCommand cmd = new MySqlCommand();
try
{
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText = myDE.Key.ToString();
Object[] cmdParms = (Object[])myDE.Value;
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
trans.Commit();
}
}
catch
{
trans.Rollback();
throw;
}
finally
{
cmd.Dispose();
conn.Close();
}
}
}
}
///
/// 执行一条计算查询结果语句，返回查询结果(object)。
///
/// 计算查询结果语句
/// 查询结果(object)
public static object GetSingle(string SQLString, params Object[] cmdParms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand())
{
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 (MySqlException e)
{
throw new Exception(e.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
}
///
/// 执行查询语句，返回MySqlDataReader (使用该方法切记要手工关闭MySqlDataReader和连接)
///
/// 查询语句
/// MySqlDataReader
public static MySqlDataReader ExecuteReader(string SQLString, params Object[] cmdParms)
{
MySqlConnection connection = new MySqlConnection(connectionString);
MySqlCommand cmd = new MySqlCommand();
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
MySqlDataReader myReader = cmd.ExecuteReader();
cmd.Parameters.Clear();
return myReader;
}
catch (MySqlException e)
{
throw new Exception(e.Message);
}
//finally //不能在此关闭，否则，返回的对象将无法使用
//{
// cmd.Dispose();
// connection.Close();
//}
}
///
/// 执行查询语句，返回DataSet
///
/// 查询语句
/// DataSet
public static DataSet Query(string SQLString, params Object[] cmdParms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (MySqlException ex)
{
throw new Exception(ex.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
return ds;
}
}
}
private static void PrepareCommand(MySqlCommand cmd, MySqlConnection conn, MySqlTransaction trans, string cmdText, Object[] 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 parameter in cmdParms)
{
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
(parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
cmd.Parameters.Add(parameter);
}
}
}
#endregion
#region 存储过程操作
///
/// 执行存储过程 (使用该方法切记要手工关闭MySqlDataReader和连接)
/// 手动关闭不了，所以少用，MySql.Data组组件还没解决该问题
///
/// 存储过程名
/// 存储过程参数
/// MySqlDataReader
public static MySqlDataReader RunProcedure(string storedProcName, Object[] parameters)
{
MySqlConnection connection = new MySqlConnection(connectionString);
MySqlDataReader returnReader;
connection.Open();
MySqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.CommandType = CommandType.StoredProcedure;
returnReader = command.ExecuteReader();
//Connection.Close(); 不能在此关闭，否则，返回的对象将无法使用
return returnReader;
}
///
/// 执行存储过程
///
/// 存储过程名
/// 存储过程参数
/// DataSet结果中的表名
/// DataSet
public static DataSet RunProcedure(string storedProcName, Object[] parameters, string tableName)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
DataSet dataSet = new DataSet();
connection.Open();
MySqlDataAdapter sqlDA = new MySqlDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
sqlDA.Fill(dataSet, tableName);
connection.Close();
return dataSet;
}
}
public static DataSet RunProcedure(string storedProcName, Object[] parameters, string tableName, int Times)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
DataSet dataSet = new DataSet();
connection.Open();
MySqlDataAdapter sqlDA = new MySqlDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
sqlDA.SelectCommand.CommandTimeout = Times;
sqlDA.Fill(dataSet, tableName);
connection.Close();
return dataSet;
}
}
///
/// 执行存储过程
///
/// 存储过程名
/// 存储过程参数
///
public static void RunProcedureNull(string storedProcName, Object[] parameters)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
connection.Open();
MySqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
command.ExecuteNonQuery();
connection.Close();
}
}
///
/// 执行
///
/// T-SQL语句；例如："pr_shell 'dir *.exe'"或"select * from sysobjects where xtype=@xtype"
/// SQL参数
/// 返回第一行第一列
public object ExecuteScaler(string storedProcName, Object[] parameters)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
object returnObjectValue;
connection.Open();
MySqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
returnObjectValue = command.ExecuteScalar();
connection.Close();
return returnObjectValue;
}
}
///
/// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
///
/// 数据库连接
/// 存储过程名
/// 存储过程参数
/// SqlCommand
private static MySqlCommand BuildQueryCommand(MySqlConnection connection, string storedProcName, Object[] parameters)
{
MySqlCommand command = new MySqlCommand(storedProcName, connection);
command.CommandType = CommandType.StoredProcedure;
foreach (MySqlParameter parameter in parameters)
{
if (parameter != null)
{
// 检查未分配值的输出参数,将其分配以DBNull.Value.
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
(parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
command.Parameters.Add(parameter);
}
}
return command;
}
///
/// 创建 MySqlCommand 对象实例(用来返回一个整数值)
///
/// 存储过程名
/// 存储过程参数
/// MySqlCommand 对象实例
private static MySqlCommand BuildIntCommand(MySqlConnection connection, string storedProcName, Object[] 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
///
/// MySqlDataReader转换成DataTable
///
///
///
public static DataTable GetNewDataTable(MySqlDataReader dataReader)
{
DataTable datatable = new DataTable();
DataTable schemaTable = dataReader.GetSchemaTable();
//动态添加列
try
{
foreach (DataRow myRow in schemaTable.Rows)
{
DataColumn myDataColumn = new DataColumn();
myDataColumn.DataType = myRow.GetType();
myDataColumn.ColumnName = myRow[0].ToString();
datatable.Columns.Add(myDataColumn);
}
//添加数据
while (dataReader.Read())
{
DataRow myDataRow = datatable.NewRow();
for (int i = 0; i < schemaTable.Rows.Count; i++)
{
myDataRow[i] = dataReader[i].ToString();
}
datatable.Rows.Add(myDataRow);
myDataRow = null;
}
schemaTable = null;
dataReader.Close();
return datatable;
}
catch (Exception ex)
{
throw new Exception("转换出错出错!", ex);
}
}
}
