Introduction: In this article I am going to explain how to dynamically add/show tool tip with each and every item(option) of asp.net dropdownlist.
In previous articles I have explained Jquery to show item text or value as tooltip with dropdownlist items in asp.net and How to show jquery tooltip message on mouse over on asp.net controls and Show asp.net gridview row details using bootstrap tooltip on mouse hover the cell and Fill country,state,cities in the dropdownlist in asp.net c#,vb.net and Populate multiple dropdownlist from same datasource in single database call in asp.net c#,vb using params or paramarray
In previous articles I have explained Jquery to show item text or value as tooltip with dropdownlist items in asp.net and How to show jquery tooltip message on mouse over on asp.net controls and Show asp.net gridview row details using bootstrap tooltip on mouse hover the cell and Fill country,state,cities in the dropdownlist in asp.net c#,vb.net and Populate multiple dropdownlist from same datasource in single database call in asp.net c#,vb using params or paramarray
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
<html>
<head runat="server">
<title>Add tooltip to dropdownlist items</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DropDownList ID="ddlEmployee" runat="server">
</asp:DropDownList>
</div>
</form>
</body>
</html>
In .aspx.cs code file add the following
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindDropwnList();
}
}
private void BindDropwnList()
{
Dictionary<int, string> EmployeeList = new Dictionary<int, string>();
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";
ddlEmployee.DataBind();
// Adding tooltip to each item of dropdownlist
foreach (ListItem li in ddlEmployee.Items)
{
if (Convert.ToInt32(li.Value) > 0)
{
//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);
}
}
}
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