c#------MySqlHelper
时间：2021-07-01 10:21:17
帮助过：2人阅读
MySqlHelper
{
//从配置文件读取连接字符串
private static readonly string connstr = ConfigurationManager.ConnectionStrings[
"connStrs"].ConnectionString;
//创建连接
public static MySqlConnection CreateConnection()
{
MySqlConnection conn =
new MySqlConnection(connstr);
conn.Open();
return conn;
}
public static int ExecuteNonQuery(MySqlConnection conn,
string sql,
params MySqlParameter[]parameters)
{
using (MySqlCommand cmd =
conn.CreateCommand())
{
cmd.CommandText =
sql;
cmd.Parameters.AddRange(parameters);
return cmd.ExecuteNonQuery();
}
}
public static int ExecuteNonQuery(
string sql,
params MySqlParameter[] parameters)
{
using (MySqlConnection conn =
CreateConnection())
{
return ExecuteNonQuery(conn,sql,parameters);
}
}
public static object ExecuteScalar(MySqlConnection conn,
string sql,
params MySqlParameter[] parameters)
{
using (MySqlCommand cmd =
conn.CreateCommand())
{
cmd.CommandText =
sql;
cmd.Parameters.AddRange(parameters);
return cmd.ExecuteScalar();
}
}
public static object ExecuteScalar(
string sql,
params MySqlParameter[] parameters)
{
using (MySqlConnection conn =
CreateConnection())
{
return ExecuteScalar(conn,sql,parameters);
}
}
public static DataTable ExecuteQuery(MySqlConnection conn,
string sql, MySqlParameter[] parameters)
{
DataTable table =
new DataTable();
using (MySqlCommand cmd =
conn.CreateCommand())
{
cmd.CommandText =
sql;
cmd.Parameters.AddRange(parameters);
using (MySqlDataReader reader =
cmd.ExecuteReader())
{
table.Load(reader);
}
}
return table;
}
public static DataTable ExecuteQuery(
string sql,
params MySqlParameter[] parameters)
{
using (MySqlConnection conn =
CreateConnection())
{
return ExecuteQuery(conn,sql,parameters);
}
}
}
c#------MySqlHelper
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