Sorry, I couldnt find the answer in this link.

I have a list of  objects. the name of the data field of an object,  is Num and is int, the name of the label is Text, and is a string type.

I want the label to show the field Text.

It should be just one line of code. Could you please write it?

I tried.

It just gives when you point on the column, it shows: "Num"

This sets the labels , not the tooltip column.

Sorry, I havent managed to do it.

Here is my code.

Could you show me how to do it.

Just to explain my need. The thing is I have long labels, which cannot be shown fully under the x axis.

So the tooltip is a way for the user to see the label.

If there is another way to enable the user to see the labels, that is fine.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsApplication9
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            List<Item> itemList = new List<Item>();
            itemList.Add(new Item(50, "label1"));
            itemList.Add(new Item(100, "label2"));
            itemList.Add(new Item(80, "label3"));
            itemList.Add(new Item(70, "label4"));

            this.ultraChart1.DataSource = itemList;
            this.ultraChart1.DataBind();
        }
    }




    public class Item
    {
        public Item(int num, string text)
        {
            Text = text;
            Num = num;
        }
        private string mText;
        private int mNum;

        public int Num
        {
            get { return mNum; }
            set { mNum = value; }
        }

        public string Text
        {
            get { return mText; }
            set { mText = value; }
        }

    }
}

With adding:

this.ultraChart1.Tooltips.FormatString = "<SERIES_LABEL>";

The chart will show “label1”, “label2”  … as tooltips.