DropDownList DataBound Event
.net developers can populate a dropdownlist server controls by items using data bind with various data source
controls such as ObjectDataSource, LinqDataSource, SqlDataSource, ArrayList, Array etc. dropdownlist DataBound event
occurs after the dropdownlist control bind to a data source. this event notifies dropdownlist control
that any data binding logic written for it has completed. we can write an event handler for this event in script section
using dropdownlist OnDataBound property.
the following c# example code demonstrate us how can we use dropdownlist DataBound event in asp.net.
the following c# example code demonstrate us how can we use dropdownlist DataBound event in asp.net.
DropDownListOnDataBoundEvent.aspx
<%@ Page Language="C#" AutoEventWireup="true" %>
<!DOCTYPE html>
<script runat="server">
protected void Button1_Click(object sender, System.EventArgs e)
{
string[] colors = { "DarkBlue", "Ivory", "LightPink", "LightSalmon", "CadetBlue" };
DropDownList1.DataSource = colors;
DropDownList1.DataBind();
}
protected void DropDownList1_DataBound(object sender, EventArgs e)
{
Label1.Text = "Pick your favorite color: ";
Label1.ForeColor = System.Drawing.Color.OliveDrab;
Label1.Font.Name = "Comic Sans MS";
Label1.Font.Italic = true;
DropDownList1.Items[2].Selected = true;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>How to use DropDownList OnDataBound event in asp.net</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:Crimson; font-style:italic;">
How to use DropDownList
<br /> OnDataBound event in asp.net
</h2>
<hr width="350" align="left" color="IndianRed" />
<asp:Label
ID="Label1"
runat="server"
>
</asp:Label>
<asp:DropDownList
ID="DropDownList1"
runat="server"
ForeColor="DarkOliveGreen"
Font-Size="Large"
OnDataBound="DropDownList1_DataBound"
>
</asp:DropDownList>
<br />
<asp:Button
ID="Button1"
runat="server"
OnClick="Button1_Click"
Text="Populate DropDownList"
Height="45"
Font-Bold="true"
ForeColor="DodgerBlue"
/>
</div>
</form>
</body>
</html>
