CODEWITHSUNDEEP
c#asp.net
Archana
Archana

Reputation: 241

Sorting the items in `CheckBoxList`

I have a DropDownList, and the items in the list is as follows:

Bedroom
Kitchen
Garden

So after choosing any one item from the above list, I have a TextBox, in which a number is given. Therefore depending on the number given in the TextBox, the number of Locations is going to be added to the CheckBoxList.

For example, If I select "Bedroom" and give the number as "3", the CheckBoxList items will be as follows:

Bedroom1
Bedroom2
Bedroom3

The problem I am facing is, since any random item can be deleted from the CheckBoxList, the items are not sorted. For example, if I delete "Bedroom2", the list items will be:

Bedroom1  
Bedroom3

And if again "Bedroom" is selected from DropDownList and a number is given for example "2", the items in the CheckBoxList will be:

Bedroom1
Bedroom3
Bedroom1
Bedroom2

This is the same problem no matter I select any item from the DropDownList.

So can someone kindly help me on the sorting of these items how ever it is added. It should be sorted according w.r.t each location in the DropDownList.

Upvotes: 1

Views: 8139

Answers (2)

Adil Mammadov
Adil Mammadov

Reputation: 8696

You can add items to ArrayList before adding them to CheckBoxList. Then sort array list then give DataSource to CheckBoxList and DataBind()

 if(!Page.IsPostBack)
 {  
        //Create two ArrayLists for sorting items
        ArrayList listItems1 = new ArrayList();
        ArrayList listItems2 = new ArrayList();

        int q1=Convert.ToInt16(TextBox1.Text);
        for (int i = 1; i <= q1; i++)
        { 
            string t1 = DroDownList1.SelectedItem.ToString().Trim();
            //Add items hereusing .Add() method of ArrayList
            listItems1.Add(string.Concat(t1, i));
            listItems2.Add(DropDownList1.SelectedItem.Text);
        }

        //Sort your items using .Sort() method of ArrayList
        listItems1.Sort()
        listItems2.Sort()

        //Bind your items to your CheckBoxLists
        CheckBoxList1.DataSource = listItems1;
        CheckBoxList2.DataSource = listItems2;  
        CheckBoxList1.DataBind();
        ChackBoxList2.DataBind();  
    }

This is original link.

Upvotes: 0

Charlie
Charlie

Reputation: 1332

Try this

        var items = CheckBoxList1.Items
            .Cast<ListItem>()
            .OrderBy(i=>i.Text)
            .ToArray();
        CheckBoxList1.Items.Clear();
        CheckBoxList1.Items.AddRange(items);

Upvotes: 7

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