gpt4 book ai didi

C# 创建具有动态属性的对象 : LINQ select List values by property names array
转载 作者:行者123 更新时间:2023-11-30 13:16:36 26 4
gpt4 key购买 nike

class OriginalObject
{
public string str1 {get;set;}
public string str2 { get; set; }
public string str3 { get; set; }
public string str4 { get; set; }

}
class Program
{
static void Main(string[] args)
{

List<OriginalObject> obj = new List<OriginalObject>();
obj.Add(new OriginalObject()
{
str1 ="hi",
str2 = "hello",
str3 = "how",
str4 = "r u"
});

obj.Add(new OriginalObject()
{
str1 = "i",
str2 = "am",
str3 = "fine",
str4 = "great"
});

var PropertyNames = new[] { "str1","str4"};

//var result = Select from obj only column names that present in PropertyName Array
// Expected
//obj --->
// {str1 = "hi",str4="r u"}
// {str1 = "i",str4="great"}


}
}

最佳答案

其中一种方法:

var properties = typeof(OriginalObject).GetProperties()
.Where(p => PropertyNames.Contains(p.Name))
.ToList();
var output = obj.Select(o => {
dynamic x = new ExpandoObject();
var temp = x as IDictionary<string, Object>;
foreach(var property in properties)
temp.Add(property.Name, property.GetValue(o));
return x;
});

转储结果:

foreach(dynamic x in output)
{
Console.WriteLine(x.str1);
Console.WriteLine(x.str4);
}

关于C# 创建具有动态属性的对象 : LINQ select List<object> values by property names array,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32263862/

26 4 0