2019-03-25

namespace TagTools
{
    using System;
    using System.Data;
    using System.Data.SqlClient;

    public class SqlHelper
    {
        public static string DBString = string.Empty;

        public static int ExecuteNonQuery(string sql, CommandType commandType, params SqlParameter[] sqlp)
        {
            using (SqlConnection connection = new SqlConnection(DBString))
            {
                SqlCommand command = new SqlCommand(sql, connection) {
                    CommandType = commandType
                };
                if ((sqlp != null) && (sqlp.Length > 0))
                {
                    command.Parameters.AddRange(sqlp);
                }
                connection.Open();
                int num = command.ExecuteNonQuery();
                if (connection.State == ConnectionState.Open)
                {
                    connection.Close();
                    connection.Dispose();
                }
                return num;
            }
        }

        public static SqlDataReader ExecuteReader(SqlConnection sqlConnection, string sql, CommandType commandType, params SqlParameter[] sqlp)
        {
            if (sqlConnection == null)
            {
                throw new ArgumentNullException("sqlConnection");
            }
            sqlConnection = new SqlConnection(DBString);
            SqlCommand command = new SqlCommand(sql, sqlConnection) {
                CommandType = commandType
            };
            if ((sqlp != null) && (sqlp.Length > 0))
            {
                command.Parameters.AddRange(sqlp);
            }
            sqlConnection.Open();
            return command.ExecuteReader(CommandBehavior.CloseConnection);
        }

        public static object ExecuteScalar(string sql, CommandType commandType, params SqlParameter[] sqlp)
        {
            using (SqlConnection connection = new SqlConnection(DBString))
            {
                object obj2;
                SqlCommand command = new SqlCommand(sql, connection) {
                    CommandType = commandType
                };
                if ((sqlp != null) && (sqlp.Length > 0))
                {
                    command.Parameters.AddRange(sqlp);
                }
                try
                {
                    connection.Open();
                    obj2 = command.ExecuteScalar();
                }
                catch (Exception)
                {
                    obj2 = 0;
                }
                finally
                {
                    if (connection.State == ConnectionState.Open)
                    {
                        connection.Close();
                        connection.Dispose();
                    }
                }
                return obj2;
            }
        }

        public static DataTable GetDataTable(string sql, CommandType commandType, params SqlParameter[] sqlp)
        {
            using (SqlConnection connection = new SqlConnection(DBString))
            {
                DataTable dataTable = new DataTable();
                SqlCommand selectCommand = new SqlCommand(sql, connection) {
                    CommandType = commandType
                };
                if ((sqlp != null) && (sqlp.Length > 0))
                {
                    selectCommand.Parameters.AddRange(sqlp);
                }
                connection.Open();
                new SqlDataAdapter(selectCommand).Fill(dataTable);
                if (connection.State == ConnectionState.Open)
                {
                    connection.Close();
                    connection.Dispose();
                }
                return dataTable;
            }
        }
    }
}