C# 如何将列表作为列表对象访问?
对于这个新问题我深表歉意,但我很难理解如何访问通用列表中的int列表,然后将所有这些信息显示到listview winform中。这是我到目前为止所拥有的C# 如何将列表作为列表对象访问?,c#,winforms,listview,nested-lists,listviewitem,C#,Winforms,Listview,Nested Lists,Listviewitem,对于这个新问题我深表歉意,但我很难理解如何访问通用列表中的int列表,然后将所有这些信息显示到listview winform中。这是我到目前为止所拥有的 } List<Student> students; public class Student { public string First { get; set; } public string Last { get; set; } public
}
List<Student> students;
public class Student
{
public string First { get; set; }
public string Last { get; set; }
public List<int> Scores { get; set; }
public int ID { get; set; }
public string[] ToListViewItem()
{
return new string[] {
First,
Last,
ID.ToString(),
Scores.ToString()
};
}
}
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
students = new List<Student>
{
new Student {First="Svetlana", Last="Omelchenko", ID=111, Scores= new List<int> {97, 92, 81, 60}},
new Student {First="Claire", Last="O’Donnell", ID=112, Scores= new List<int> {75, 84, 91, 39}},
new Student {First="Sven", Last="Mortensen", ID=113, Scores= new List<int> {88, 94, 65, 91}},
new Student {First="Cesar", Last="Garcia", ID=114, Scores= new List<int> {97, 89, 85, 82}},
new Student {First="Debra", Last="Garcia", ID=115, Scores= new List<int> {35, 72, 91, 70}},
new Student {First="Fadi", Last="Fakhouri", ID=116, Scores= new List<int> {99, 86, 90, 94}},
new Student {First="Hanying", Last="Feng", ID=117, Scores= new List<int> {93, 92, 80, 87}},
new Student {First="Hugo", Last="Garcia", ID=118, Scores= new List<int> {92, 90, 83, 78}},
new Student {First="Lance", Last="Tucker", ID=119, Scores= new List<int> {68, 79, 88, 92}},
new Student {First="Terry", Last="Adams", ID=120, Scores= new List<int> {99, 82, 81, 79}},
new Student {First="Eugene", Last="Zabokritski", ID=121, Scores= new List<int> {96, 85, 91, 60}},
new Student {First="Michael", Last="Tucker", ID=122, Scores= new List<int> {94, 92, 91, 91} }
};
PopulateListView(students);
GetAverageGrade();
}
public void GetAverageGrade()
{
foreach (Student s in students)
{
double avg = s.Scores.Average();
}
}
public void PopulateListView(List<Student> list)
{
listView1.SuspendLayout();
for (int i = 0; i < list.Count; i++)
{
// create a list view item
var lvi = new ListViewItem(list[i].ToListViewItem());
// assign class reference to lvi Tag for later use
lvi.Tag = list[i];
// add to list view
listView1.Items.Add(lvi);
//This adjust the width of 1st column to fit data.
listView1.AutoResizeColumn(0, ColumnHeaderAutoResizeStyle.ColumnContent);
listView1.ResumeLayout();
}
}
}
到目前为止,我已经能够使用名称和学生ID填充listview的前三列,但最后一列中只包含Systems.Collections.Generic…,等等
非常感谢您的帮助。您可能正在使用返回类名的Scores.ToString方法。您可以尝试:string.Join,改为Scores。这将包含所有用、、分隔的值
这就是得分。ToString返回
如果要显示有用的信息,则需要编写使用列表并返回有用信息的代码
从看字符串开始。加入。谢谢,@J.范·兰根!非常有效。谢谢@Slaks。我感谢你的指导。
public string[] ToListViewItem()
{
return new string[] {
First,
Last,
ID.ToString(),
string.Join(", ", Scores)
};
}