Sort Arraylist of Arraylist in C#

Monir Mia

I have 3(or more then that) arraylist:

arraylist1item[0]="E;BUA;A1"
arraylist1item[1]="E;BUA;B1"

arraylist2item[0]="F;CHA;B1"
arraylist2item[1]="F;CHA;A1"
arraylist2item[2]="F;CHA;F1"
arraylist2item[3]="F;CHA;D1"
arraylist2item[4]="F;CHA;G1"

arraylist3item[0]="E;BIA;A1"
arraylist3item[1]="E;BIA;A2"
arraylist3item[2]="E;BIA;A3"

I want to sort them based on size. I have put them in another arraylist which is:

AllArrayList[0]=arraylist1item
AllArrayList[1]=arraylist2item
AllArrayList[2]=arraylist3item

Then tried but could nopt do it as I dont know how to retrieve a data from Arraylist of Arraylist. output I want them is as follows:

arraylist1item[0]="E;BUA;A1"
arraylist1item[1]="E;BUA;B1"

arraylist2item[0]="E;BIA;A1"
arraylist2item[1]="E;BIA;A2"
arraylist2item[2]="E;BIA;A3"

arraylist3item[0]="F;CHA;B1"
arraylist3item[1]="F;CHA;A1"
arraylist3item[2]="F;CHA;F1"
arraylist3item[3]="F;CHA;D1"
arraylist3item[4]="F;CHA;G1"

Any help????

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes15y ago
Accepted answer
Try this:

using System;
using System.Collections;

class Program
{
static void Main()
{
ArrayList arraylist1item = new ArrayList();
ArrayList arraylist2item = new ArrayList();
ArrayList arraylist3item = new ArrayList();
ArrayList AllArrayList = new ArrayList();

arraylist1item.Add("E;BUA;A1");
arraylist1item.Add("E;BUA;B1");

arraylist2item.Add("F;CHA;B1");
arraylist2item.Add("F;CHA;A1");
arraylist2item.Add("F;CHA;F1");
arraylist2item.Add("F;CHA;D1");
arraylist2item.Add("F;CHA;G1");

arraylist3item.Add("E;BIA;A1");
arraylist3item.Add("E;BIA;A2");
arraylist3item.Add("E;BIA;A3");

AllArrayList.Add(arraylist1item);
AllArrayList.Add(arraylist2item);
AllArrayList.Add(arraylist3item);

for(int i = 0; i < AllArrayList.Count - 1; i++)
{
for(int j = i + 1; j < AllArrayList.Count; j++)
{
ArrayList temp1 = (ArrayList)AllArrayList[i];
ArrayList temp2 = (ArrayList)AllArrayList[j];
if (temp1.Count > temp2.Count) Swap(temp1, temp2);
}
}

// check it worked

foreach(string s in arraylist1item) Console.WriteLine(s);
Console.WriteLine();
foreach(string s in arraylist2item) Console.WriteLine(s);
Console.WriteLine();
foreach(string s in arraylist3item) Console.WriteLine(s);
Console.ReadKey();
}

static void Swap (ArrayList list1, ArrayList list2)
{
ArrayList list3 = new ArrayList(list1);
list1.Clear();
foreach(string s in list2) list1.Add(s);
list2.Clear();
foreach(string s in list3) list2.Add(s);
}

}
Monir Mia15y ago
Many thanks mate. It works. I love it.