How to add items from check box into list box in ASP.NET?

Question

1.00/5 (2 votes)

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//design html source
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="CheckBoxExercise.aspx.cs" Inherits="DropDownListBoxControl.CheckBoxExercise" %>

<!DOCTYPE html>

<title>

.auto-style1 {
width: 100%;
}
.auto-style2 {
width: 281px;
}
.auto-style3 {
width: 108px;
}
.auto-style6 {
margin-bottom: 0px;
}
.auto-style7 {
width: 108px;
text-align: center;
height: 128px;
}
.auto-style8 {
text-align: left;
}
.auto-style9 {
font-size: x-large;
}
.auto-style10 {
width: 281px;
height: 128px;
}
.auto-style11 {
height: 128px;
}
.auto-style12 {
width: 108px;
font-size: x-large;
}
.auto-style13 {
width: 281px;
font-size: x-large;
}

<asp:Panel ID="Panel1" runat="server" Height="168px" Width="281px"> <asp:CheckBoxList ID="lstCourses" runat="server" AutoPostBack="True" Height="40px" Width="260px">	<asp:Button ID="btnAdd" runat="server" CssClass="auto-style6" OnClick="btnAdd_Click" Text=">" /> <asp:Button ID="btnAll" runat="server" OnClick="btnAll_Click" Text=">>" />	<asp:Panel ID="Panel2" runat="server" Height="168px" Width="267px"> <asp:ListBox ID="lstAddItem" runat="server" Height="145px" SelectionMode="Multiple" Width="221px">
		<asp:Label ID="lblDetails" runat="server" CssClass="auto-style9">
		<asp:Button ID="btnRemove" runat="server" CssClass="auto-style9" OnClick="btnRemove_Click" Text="Remove" /> <asp:Button ID="btnRemove0" runat="server" CssClass="auto-style9" Text="Clear All" />

What I have tried:

C#

code file..

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace DropDownListBoxControl
{
    public partial class CheckBoxExercise : System.Web.UI.Page
    {
        List<listitem> courses = new List<listitem>()
        {
            new ListItem {Text="ASP.NET", Value="3000" },
            new ListItem {Text="SQL Server", Value="2000" },
            new ListItem {Text="MVC",Value="1400" }
        };
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                foreach (var item in courses)
                {
                    lstCourses.Items.Add(item);
                }
            }
        }

        protected void btnAdd_Click(object sender, EventArgs e)
        {
            lstAddItem.Items.Clear();
            if(lstAddItem.Items.Contains(lstCourses.SelectedItem))
            {
                lblDetails.Text = "Course is Exists...";

            }
            else
            {                        
           lstAddItem.Items.Add(lstCourses.SelectedItem);
                
            }
        }

        protected void btnAll_Click(object sender, EventArgs e)
        {
            lstAddItem.Items.Clear();
            foreach(var item in courses)
            {
                lstAddItem.Items.Add(item);
            }
        }

        protected void btnRemove_Click(object sender, EventArgs e)
        {
            
            lstAddItem.Items.Remove(lstAddItem.SelectedItem);
            lblDetails.Text = "Course Removed ......";

        }
    }
}

Posted 22-Oct-17 21:39pm

Pankaj hyderabad

Updated 22-Oct-17 22:31pm

Karthik_Mahalingam

v2

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Comments

Karthik_Mahalingam 23-Oct-17 3:44am

what is the issue ?

Pankaj hyderabad 23-Oct-17 4:06am

i want to add selected value from checkbox list into listbox..
in case if i checked one value so that value is added on list box .
but if i want to add selected items into list box ..then it adding only last selected item..

Karthik_Mahalingam 23-Oct-17 4:23am

check the solution.

Pankaj hyderabad 23-Oct-17 4:08am

can u give me code for add one and multiple item from checkboxlist into listbox in asp.net

2 solutions

Solution 2

If I am correct, what you want is to get a list of selected checkboxes and add some specific attribute of the control to a list-box.

You can try something like this in your add button click event:

C#

foreach (Control control in form1.Controls)
        {
            if (control is CheckBox && control.Checked)
            {
                //add the item to your list.
            }
        }

It is just a rough skeleton of the code, you may have to tweak a bit for it to work.

Have a good day.

Posted 22-Oct-17 22:30pm

GKP1992

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Karthik_Mahalingam · Accepted Answer · 2017-10-22T22:22:00

check the corrections

List<ListItem> courses = new List<ListItem>()
       {
           new ListItem {Text="ASP.NET", Value="3000" },
           new ListItem {Text="SQL Server", Value="2000" },
           new ListItem {Text="MVC",Value="1400" }
       };
       protected void Page_Load(object sender, EventArgs e)
       {

           if (!Page.IsPostBack)
           {
               foreach (var item in courses)
               {
                   lstCourses.Items.Add(item);
               }
           }
       }

       protected void btnAdd_Click(object sender, EventArgs e)
       {
           lstAddItem.Items.Clear();
           foreach (ListItem item in lstCourses.Items)
           {
               if (item.Selected)
                   lstAddItem.Items.Add(item);
           }


       }

       protected void btnAll_Click(object sender, EventArgs e)
       {
           lstAddItem.Items.Clear();
           foreach (var item in courses)
           {
               item.Selected = true;
               lstAddItem.Items.Add(item);
           }
           foreach (ListItem item in lstCourses.Items)
               item.Selected = true;

       }

       protected void btnRemove_Click(object sender, EventArgs e)
       {

           lstAddItem.Items.Remove(lstAddItem.SelectedItem);
           lblDetails.Text = "Course Removed ......";

       }
       protected void btnRemoveAll_Click(object sender, EventArgs e)
       {

           lstAddItem.Items.Clear();
           lblDetails.Text = "Items Cleared......";

       }