C# 如何获取 List<object> 的单个值
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How to get single value of List<object>
提问by vyclarks
I'm a new to ASPX, hope you dont mind if my problem is so simple with somebody.
我是 ASPX 的新手，希望您不介意我的问题对某人来说如此简单。
I use a List<object> selectedValues;
我用一个 List<object> selectedValues;
selectedValues=...list of object(item1, item2,..)
Each object has 3 fields: id, title, and content.
每个对象有3个字段：id，title，和content。
foreach (object[] item in selectedValues)
{
foreach (object value in item)
{
string result += string.Format("{0} ", value);
Textbox1.Text= result;--> all field is displayed in one Textbox.
}
}
My problem is: how can I get the single field, I mean:
我的问题是：我怎样才能得到单个字段，我的意思是：
foreach (object value in item)
{
TextBox1.Text = id...???
TextBox2.Text= title...???
TextBox3.Text= content...???
}
采纳答案by Alex
You can access the fields by indexing the object array:
您可以通过索引对象数组来访问字段：
foreach (object[] item in selectedValues)
{
idTextBox.Text = item[0];
titleTextBox.Text = item[1];
contentTextBox.Text = item[2];
}
That said, you'd be better off storing the fields in a small class of your own if the number of items is not dynamic:
也就是说，如果项目数量不是动态的，您最好将字段存储在您自己的一个小类中：
public class MyObject
{
public int Id { get; set; }
public string Title { get; set; }
public string Content { get; set; }
}
Then you can do:
然后你可以这样做：
foreach (MyObject item in selectedValues)
{
idTextBox.Text = item.Id;
titleTextBox.Text = item.Title;
contentTextBox.Text = item.Content;
}
回答by User1551892
Define a class like this :
定义一个这样的类：
public class myclass {
string id ;
string title ;
string content;
}
public class program {
public void Main () {
List<myclass> objlist = new List<myclass> () ;
foreach (var value in objlist) {
TextBox1.Text = value.id ;
TextBox2.Text= value.title;
TextBox3.Text= value.content ;
}
}
}
I tried to draw a sketch and you can improve it in many ways. Instead of defining class "myclass", you can define struct.
我试着画一个草图，你可以在很多方面改进它。您可以定义结构，而不是定义类“myclass”。
