删除C#中Collection的指定索引处的元素
要删除Collection的指定索引处的元素,代码如下-
示例
using System;using System.Collections.ObjectModel;
public class Demo {
public static void Main() {
Collection<string> col = new Collection<string>();
col.Add("Andy");
col.Add("Kevin");
col.Add("John");
col.Add("Kevin");
col.Add("Mary");
col.Add("Katie");
col.Add("Barry");
col.Add("Nathan");
col.Add("Mark");
Console.WriteLine("Count of elements = "+ col.Count);
Console.WriteLine("Iterating through the collection...");
var enumerator = col.GetEnumerator();
while (enumerator.MoveNext()) {
Console.WriteLine(enumerator.Current);
}
col.RemoveAt(3);
Console.WriteLine("Count of elements (updated) = "+ col.Count);
Console.WriteLine("Iterating through the collection... (updated)");
enumerator = col.GetEnumerator();
while (enumerator.MoveNext()) {
Console.WriteLine(enumerator.Current);
}
}
}
输出结果
这将产生以下输出-
Count of elements = 9Iterating through the collection...
Andy
Kevin
John
Kevin
Mary
Katie
Barry
Nathan
Mark
Count of elements (updated) = 8
Iterating through the collection... (updated)
Andy
Kevin
John
Mary
Katie
Barry
Nathan
Mark
示例
让我们看另一个例子-
using System;using System.Collections.ObjectModel;
public class Demo {
public static void Main() {
Collection<string> col = new Collection<string>();
col.Add("One");
col.Add("Two");
col.Add("Three");
col.Add("Four");
col.Add("Five");
col.Add("Six");
Console.WriteLine("Count of elements = "+ col.Count);
Console.WriteLine("Iterating through the collection...");
var enumerator = col.GetEnumerator();
while (enumerator.MoveNext()) {
Console.WriteLine(enumerator.Current);
}
col.RemoveAt(1);
col.RemoveAt(2);
col.RemoveAt(3);
Console.WriteLine("Count of elements (updated) = "+ col.Count);
Console.WriteLine("Iterating through the collection... (updated)");
enumerator = col.GetEnumerator();
while (enumerator.MoveNext()) {
Console.WriteLine(enumerator.Current);
}
}
}
输出结果
这将产生以下输出-
Count of elements = 6Iterating through the collection...
One
Two
Three
Four
Five
Six
Count of elements (updated) = 3
Iterating through the collection... (updated)
One
Three
Five
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