Question

我正在寻找一种将包含动态对象的<?php require 'vendor/autoload.php'; use Medoo\Medoo; $database = new Medoo([ 'database_type' => 'mssql', 'database_name' => 'name', 'server' => 'localhost', 'username' => 'your_username', 'password' => 'your_password' ]); $result = $database->select("account", [ "user_name", "email" ];转换为字典的方法，该字典的键是属性名，值是该属性的不同值。

当前我使用了这段代码，但是我觉得必须有一种更优雅/更快的方式来做到这一点？

List<object>

Answer 1

批准探针的方式很好，但是您需要进行一些更改以使该方法更快。

private static Dictionary <Type, List <PropertyInfo>> Props = new Dictionary<Type, List<PropertyInfo>> (); 
public Dictionary <string,IList<String>> Convert(List <object> records) {                                  
    var result = new Dictionary <string,IList <string>>();                                                 
    foreach(object record in records) {                                                                    
        if (!Props.ContainsKey(record.GetType()))                                                          
            Props.Add(record.GetType(), record.GetType().GetProperties());                                 

        foreach(var prop in Props[record.GetType()]) {                                                     
            var colValue = prop.GetValue(record, null);                                                    
            if (colValue != null) {                                                                        
                if (result.ContainsKey(prop.Name)) {                                                       
                    result[prop.Name].Add(colValue.ToString());                                            
                }                                                                                          
                else {                                                                                     
                    result.Add(prop.Name, new List <string> () {colValue.ToString()});                     
                }                                                                                          
            }                                                                                              
        }                                                                                                  
    }                                                                                                      
    return result;                                                                                         
}

Answer 2

您是否正在寻找类似的东西？

var result = properties.ToDictionary(
    keySelector: propertyName => propertyName,
    elementSelector: propertyName => records
          .Select(record => record.GetType().GetProperty(propertyName)?.GetValue(record, null).ToString())
          .Where(colValue => colValue != null));

将动态对象列表转换为Dictionary <属性名，值=“”>

2 个答案: