In this article, I will show you how to create a multi-select in an ASP.net page. I will keep this article short and sweet so you can just use the code in your applications. Previously i refer many codes about multiselect dropdown but i found all are little complex to implement. So i decided to try it in my own. Lets see how i implement this.
Introduction
In this article, I will show you how to create a
multi-
select in an ASP.net page. I will keep this article short and sweet so you can just use the code in your applications. Previously i refer many codes about multiselect dropdown but i found all are little complex to implement. So i decided to try it in my own. Lets see how i implement this.
Objective
First, you must be install the ajax controls in your visual studio. I am using VS2010.
Because, i am using popup control extender to implement this one.
Using the code
Now, place one textbox in your design view and assign the popup extender for that textbox. Important note here is you must be place your textbox control within the "Updatepanel".
Afterwards, you create one panel and within this panel you put one checkboxlist. You assign this panel to the "PopupControlID" property of the Popup Extender.
Now see this code:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="multidropdown.aspx.cs" Inherits="_Default"%>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1
/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ToolkitScriptManager runat="server">
</asp:ToolkitScriptManager>
<asp:UpdatePanel ID="updatepanel1" runat="server">
<ContentTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:PopupControlExtender ID="TextBox1_PopupControlExtender" runat="server"
Enabled="True" ExtenderControlID="" TargetControlID="TextBox1"
PopupControlID="Panel1" OffsetY="22">
</asp:PopupControlExtender>
<asp:Panel ID="Panel1" runat="server" Height="116px" Width="145px"
BorderStyle="Solid" BorderWidth="2px" Direction="LeftToRight"
ScrollBars="Auto" BackColor="#CCCCCC" Style="display: none">
<asp:CheckBoxList ID="CheckBoxList1" runat="server"
DataSourceID="SqlDataSource1" DataTextField="holiday_name"
DataValueField="holiday_name" AutoPostBack="True"
OnSelectedIndexChanged="CheckBoxList1_SelectedIndexChanged">
</asp:CheckBoxList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$
ConnectionStrings:employeedbConnectionString %>"
SelectCommand="SELECT [holiday_name] FROM [tblholidaymas]">
</asp:SqlDataSource>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
Finally we must do only one modification in code behind, because each time clicking the checkboxlist that selected value will added into the textbox control. So in selected index changed event you will place this code.
protected void CheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
{
string name = "";
for (int i = 0; i < CheckBoxList1.Items.Count; i++)
{
if (CheckBoxList1.Items[i].Selected)
{
name += CheckBoxList1.Items[i].Text + ",";
}
}
TextBox1.Text = name;
}
Now we did it.