Show item text or value as tooltip with dropdownlist items in

IntroductionIn this article I am going to explain how to dynamically add/show tool tip with each and every item(option) of dropdownlist. 

Show item text as tooltip with dropdownlist items in asp.netShow item value as tooltip with dropdownlist items in

Description:  We need to add 'Title' attribute to each item of dropdownlist by looping through the dropdownlist.
As we know there is a text and a value for each item of dropdownlist, we can show any of these two on tooltip by setting the text or value as a 'Title' attribute for each item as demonstrated in example below.

Implementation:  Let's take an example for demonstration purpose. For demonstration purpose I have binded the dropdownlist using Dictionary.
In actual application I assume it should be binded with the data fetched from the database.

In .aspx file add the following

<head runat="server">
       <title>Add tooltip to dropdownlist items</title>   
    <form id="form1" runat="server">
     <asp:DropDownList ID="ddlEmployee" runat="server">

In .aspx.cs code file add the following
protected void Page_Load(object sender, EventArgs e)
        if (!IsPostBack)

    private void BindDropwnList()
        Dictionary<intstring> EmployeeList = new Dictionary<intstring>();
        EmployeeList.Add(0, "-Select-");
        EmployeeList.Add(101, "Aashish Sharma");
        EmployeeList.Add(102, "Tarun Verma");
        EmployeeList.Add(103, "Sunidhi Chauhan");
        EmployeeList.Add(104, "Shivani Singh");
        EmployeeList.Add(105, "Arun Kashyap");
        ddlEmployee.DataSource = EmployeeList;
        ddlEmployee.DataValueField = "Key";
        ddlEmployee.DataTextField = "Value";

      // Adding tooltip to each item of dropdownlist
        foreach (ListItem li in ddlEmployee.Items)
            if (Convert.ToInt32(li.Value) > 0) //Skip adding tooltip on first item i.e. on '--Select--'
                //Add Item text as tooltip
                li.Attributes.Add("Title", li.Text);
                //To add Item value as tooltip comment above line and uncomment below line
                li.Attributes.Add("Title", "Employee Id: " + li.Value);

Now over to you:
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