Get table information in mysql database

 

 

 

 

 #regionGet database table information list
         ///  <summary> 
        /// Get database table information list
         ///  </ summary> 
        ///  <param name = "input"> </ param> 
        ///  <returns> < / returns> 
        public Task <List <DetailMessageInfoDto >> GetTableList ( string input) 
        { 
            using (MySqlConnection conn = GetConnection ()) 
            { 
                List <DetailMessageInfoDto> dic = new List <DetailMessageInfoDto> (); 
                MySqlCommand cmd = conn.CreateCommand ();
                if (string.IsNullOrEmpty(input))
                {
                    cmd.CommandText = "select table_name from information_schema.tables  where table_schema='"+ dataName + "' and table_name <>'__efmigrationshistory'";
                }
                else
                {
                    cmd.CommandText =string.Format("select table_name from information_schema.tables  where table_schema='"+ dataName + "' and table_name like '%{0}%'",input);
                }
                using (MySqlDataReader reader = cmd.ExecuteReader())
                {
                   
                    while (reader.Read())
                    {
                        string table = reader.GetString("table_name");
                        DetailMessageInfoDto model = new DetailMessageInfoDto() { TableName = table };
                        dic.Add(model);
                    }


                }
                conn.Close();
                return Task.FromResult(dic);
              
            }

        

        }
        #endregion

  #regionGet database table field information based on table name
         ///  <summary> 
        /// Get database table field information based on table name
         ///  </ summary> 
        ///  <param name = "table"> </ param> 
        / //  <returns> </ returns> 
        public Task <List <MyTable >> GetFieldList ( string table) 
        { 
            using (MySqlConnection conn = GetConnection ()) 
            { 
                Dictionary < string , MyTable> dic = new Dictionary < string , MyTable> () ; 
                MySqlCommand cmd = conn.CreateCommand ();
                
                    cmd.CommandText =string.Format("select table_name,column_name,data_type,column_comment from information_schema.columns  where table_schema='"+ dataName + "' and table_name='{0}'",table);

                using (MySqlDataReader reader = cmd.ExecuteReader())
                {
                    while (reader.Read())
                    {
                    
                        Columns columns = new Columns();
                        string column = reader.GetString("column_name");
                        string types = reader.GetString("data_type");
                        string comment = reader.GetString("column_comment");
                        columns.ColumnName = column;
                        columns.TypeName = types;
                        columns.comment = comment;
                        if (dic.ContainsKey(table))
                        {
                            dic[table].ColumnList.Add(columns);
                        }
                        else
                        {
                            MyTable t = new MyTable();
                            t.Table = table;
                            t.ColumnList.Add(columns);
                            dic.Add(t.Table, t);
                        }
                    }
                }
                conn.Close();
                
                return Task.FromResult(dic.Values.ToList());
            }
        }
        #endregion


        public MySqlConnection GetConnection()
        {
            MySqlConnection conn = new MySqlConnection(ConfigurationManager.conns);
            conn.Open();
            return conn;
        }

public  class MyTable
    {
        public string Table { get; set; }
        public List<Columns> ColumnList { get; set; } = new List<Columns>();
    }

    public class Columns
    { 
    public string ColumnName { get; set; }
    public string TypeName { get; set; }
     public string comment { get; set; }
    }

 public class DetailMessageInfoDto
    {
        /// <summary>
        /// 描述
        /// </summary>
        public string TableName { get; set; }
    }