MySqlHelp.cs
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using Microsoft.EntityFrameworkCore;
using System;
using System.Data;
using System.Data.SqlClient;
using MySql.Data.MySqlClient;
namespace WebRepository
{
public class MySqlHelp
{
private readonly string _cnString;
public MySqlHelp(string cnString)
{
_cnString = cnString;
}
/// <summary>
/// 数据操作
/// </summary>
public int DataOperator(string Cmstring)
{
int Line = 0;
MySqlCommand sqlCm = null;
MySqlConnection sqlCn = null;
try
{
using (sqlCn = new MySqlConnection(_cnString))
{
sqlCn.Open();
sqlCm = new MySqlCommand(Cmstring, sqlCn);
Line = sqlCm.ExecuteNonQuery();
sqlCn.Close();
}
}
catch (Exception ex)
{
Line = -1;
throw new Exception(ex.Message.Replace(Environment.NewLine, ""));
}
finally
{
sqlCn.Dispose();
if (sqlCm != null)
sqlCm.Dispose();
}
return Line;
}
/// <summary>
/// 查询信息
/// </summary>
public DataSet SelectGet(string CmString)
{
DataSet ds = new System.Data.DataSet();
MySqlConnection sqlCn = null;
MySqlDataAdapter sqlDa = null;
try
{
using (sqlCn = new MySqlConnection(_cnString))
{
sqlCn.Open();
sqlDa = new MySqlDataAdapter(CmString, sqlCn);
sqlDa.Fill(ds);
sqlCn.Close();
}
}
catch (Exception ex)
{
ds = null;
throw new Exception(ex.Message.Replace(Environment.NewLine, ""));
//App.ExFile.MessageLog(App.ExFile.Path_Emessage, "", ex.ToString());
}
finally
{
sqlCn.Dispose();
if (sqlDa != null)
sqlDa.Dispose();
}
return ds;
}
/// <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>
/// <returns></returns>
public int RunProcedure(string storedProcName, IDataParameter[] parameters)
{
int result = 0;
using (MySqlConnection connection = new MySqlConnection(_cnString))
{
connection.Open();
MySqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
int rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
connection.Close();
}
return result;
}
public int ProcOutput(SqlCommand cmd, string procName, SqlParameter[] paras)
{
int result = 0;
cmd.CommandType = CommandType.StoredProcedure;//设置此类型是存储过程类型
cmd.CommandText = procName;//设置执行的存储过程//添加para参数
if (paras != null)
{
foreach (SqlParameter parameter in paras)
cmd.Parameters.Add(parameter);
}
cmd.Parameters.Add(new SqlParameter("@ReturnValue",
SqlDbType.Int,
(int)ParameterDirection.Output));
int n = cmd.ExecuteNonQuery();//执行语句并返回受影响的行数
result = (int)cmd.Parameters["ReturnValue"].Value;
return result;
}
public int ProcOutput(MySqlCommand cmd, string procName, MySqlParameter[] paras)
{
int result = 0;
cmd.CommandType = CommandType.StoredProcedure;//设置此类型是存储过程类型
cmd.CommandText = procName;//设置执行的存储过程//添加para参数
if (paras != null)
{
foreach (MySqlParameter parameter in paras)
cmd.Parameters.Add(parameter);
}
cmd.Parameters.Add(new MySqlParameter("ReturnValue",
MySqlDbType.Int32, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
int n = cmd.ExecuteNonQuery();//执行语句并返回受影响的行数
result = (int)cmd.Parameters["ReturnValue"].Value;
return result;
}
public int ProcOutput(string procName, SqlParameter[] paras)
{
int result = 0;
MySqlConnection conn = new MySqlConnection(_cnString);//创建数据库连接对象
conn.Open();//打开数据库连接
//SqlCommand cmd = conn.CreateCommand();//创建并执行与此连接关联的T-Sql语句命令的对象，可以不用这段用下面两段
MySqlCommand cmd = new MySqlCommand
{
Connection = conn
};
cmd.CommandType = CommandType.StoredProcedure;//设置此类型是存储过程类型
cmd.CommandText = procName;//设置执行的存储过程//添加para参数
if (paras != null)
{
foreach (SqlParameter parameter in paras)
cmd.Parameters.Add(parameter);
}
cmd.Parameters.Add(new SqlParameter("@ReturnValue",
SqlDbType.Int,
(int)ParameterDirection.Output));
int n = cmd.ExecuteNonQuery();//执行语句并返回受影响的行数
result = (int)cmd.Parameters["ReturnValue"].Value;
conn.Close();//关闭连接
return result;
}
private MySqlCommand BuildIntCommand(MySqlConnection connection, string storedProcName, 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;
}
private MySqlCommand BuildQueryCommand(MySqlConnection connection, string storedProcName, IDataParameter[] parameters)
{
MySqlCommand command = new MySqlCommand(storedProcName, connection)
{
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;
}
/// <summary>
/// 调用存储过程Output参数方法
/// </summary>
/// <param name="procName">执行的存储过程语句</param>
/// <param name="paras">数据库的参数</param>
/// <param name="OutName">定义Output参数</param>
/// <returns>返回值</returns>
public object ProcOutput(string procName, SqlParameter[] paras, string OutName)
{
object o = null;
MySqlConnection conn = new MySqlConnection(_cnString);//创建数据库连接对象
conn.Open();//打开数据库连接
//SqlCommand cmd = conn.CreateCommand();//创建并执行与此连接关联的T-Sql语句命令的对象，可以不用这段用下面两段
MySqlCommand cmd = new MySqlCommand
{
Connection = conn,
CommandType = CommandType.StoredProcedure,//设置此类型是存储过程类型
CommandText = procName//设置执行的存储过程//添加para参数
};
if (paras != null)
{
foreach (SqlParameter parameter in paras)
cmd.Parameters.Add(parameter);
}
int n = cmd.ExecuteNonQuery();//执行语句并返回受影响的行数
o = cmd.Parameters[OutName].Value;//获取@CardID的值
conn.Close();//关闭连接
return o;
}
}
}