给定一个具有属性对象数组的对象，如何在C＃中设置所述属性的特定实例？

Question

我有两个对象：'表'和'记录'。 'Table'有一个属性'Items'，它是一个'Record []'类型的数组。

如何将“Table”的特定实例（例如table.Items [0]）的“Items”属性设置为“Record”的特定实例（例如first_record）？

我尝试按如下方式编写代码，但是我的代码导致“NullReferenceException未处理”错误。

Record first_record = new Record();
first_record.Field1 = "r1f1";
first_record.Field2 = "r1f2";
first_record.Field3 = "r1f3";

Record second_record = new Record();
second_record.Field1 = "r2f1";
second_record.Field2 = "r2f2";
second_record.Field3 = "r2f3";

Table table = new Table();
table.Items[0] = first_record;
table.Items[1] = second_record;

谢谢

Answer 1

Stackoverflow建议similar question提供了我的答案。我没能初始化数组。这是我失踪的那条线：

table.Items = new Record[2];

将该行插入原始问题的代码中会产生以下结果：

Record first_record = new Record();
first_record.Field1 = "r1f1";
first_record.Field2 = "r1f2";
first_record.Field3 = "r1f3";

Record second_record = new Record();
second_record.Field1 = "r2f1";
second_record.Field2 = "r2f2";
second_record.Field3 = "r2f3";

Table table = new Table();
table.Items = new Record[2];
table.Items[0] = first_record;
table.Items[1] = second_record;

这就是诀窍。谢谢Stackoverflow！