How to convert ArrayList into string array(string[]) in c#

问题

How can I convert ArrayList into string[] in C#?

回答1:

string[] myArray = (string[])myarrayList.ToArray(typeof(string));

回答2:

A simple Google or search on MSDN would have done it. Here:

ArrayList myAL = new ArrayList(); 

// Add stuff to the ArrayList.
String[] myArr = (String[]) myAL.ToArray( typeof( string ) );

回答3:

use .ToArray(Type)

string[] stringArray = (string[])arrayList.ToArray(typeof(string));

回答4:

Try do that with ToArray() method.

ArrayList a= new ArrayList(); //your ArrayList object
var array=(String[])a.ToArray(typeof(string)); // your array!!!

回答5:

using System.Linq;

public static string[] Convert(this ArrayList items)
{
    return items == null
        ? null
        : items.Cast<object>()
            .Select(x => x == null ? null : x.ToString())
            .ToArray();
}

回答6:

You can use CopyTo method of ArrayList object.

Let's say that we have an arraylist, which has String Type as Elements.

strArrayList.CopyTo(strArray)

回答7:

Another way is as follows.

System.Collections.ArrayList al = new System.Collections.ArrayList();
al.Add("1");
al.Add("2");
al.Add("3");
string[] asArr = new string[al.Count];
al.CopyTo(asArr);

来源：https://stackoverflow.com/questions/8924869/how-to-convert-arraylist-into-string-arraystring-in-c-sharp