扩展函数以接受列表 - C# [英] Extend a function to accept a list - C#
本文介绍了扩展函数以接受列表 - C#的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有以下接受字符串数组或数组对象的函数。我想扩展这个函数,它也接受一个对象列表和一个字符串列表。
找不到如何实现它的方法。任何帮助将不胜感激。
I have the following function that accepts an array of strings or an array object. I want to extend this function in such a way that it also accepts a list of objects and a list of strings.
Cannot find a way of how to implement it. Any help would be appreciated.
public override void Run()
{
log.Trace(this, String.Format(LoggingConstants.StartCustomStep, this.GetType().Name));
object[] realList;
object rawList = (object)GetInput("List", typeof(object));
object item = (object)GetInput("Item", typeof(object));
if (rawList is object[])
{
realList = (object[])rawList;
}
else if (rawList is string)
{
realList = (rawList as string).Split(";".ToCharArray());
}
else
throw new ArgumentException("Invalid List argument supplied. Must be an array or string.");
string status = StatusConstants.Fail;;
if (item != null)
{
foreach (object listItem in realList)
{
if (item.Equals(listItem))
{
status = StatusConstants.Pass;
break;
}
}
}
SetOutput("Status", status);
log.Trace(this, String.Format(LoggingConstants.EndCustomStep, this.GetType().Name));
}
我的尝试:
什么都没有成功。然而有人建议首先检查列表,然后使用else if检查数组
What I have tried:
nothing that managed to work. However someone advised to start by checking the list then use else if to check the array
推荐答案
让方法接受IEnumerable< string>< ; / string>
参数。列表和数组都实现IEnumerable,您仍然可以使用foreach
遍历成员。
Have the method accept anIEnumerable<string></string>
argument. Both lists and arrays implement IEnumerable, and you can still iterate through the members withforeach
.
这篇关于扩展函数以接受列表 - C#的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文