Move items from one listbox to another listbox and vice versa in asp.net

Introduction: In this article today I will explain how we can move items from one listbox to another listbox and vice versa in asp.net

Description:

In the previous article I have explained Get multiple selected values from Listbox in asp.net, Explain cookies in asp.net OR Explain cookies with example in asp.net and Display number of character left and count word in asp.net multiline textbox using Jquery plugin.

I have added the two listboxes to webform. One listbox contain the country name and second one city name.  In this example I have move single item from country listbox to city listbox and vice versa. Also move all items to between each other.

Design the page as Html Markup shown below:

<fieldset>

    <legend>ListBox Example</legend>  

    <table style="height: 168px; width: 279px">

    <tr><td>  <asp:ListBox ID="lstbcountry" runat="server" SelectionMode="Multiple"

            Height="102px" Width="99px">

        <asp:ListItem>India</asp:ListItem>

        <asp:ListItem>England</asp:ListItem>

        <asp:ListItem>Cuba</asp:ListItem>

        <asp:ListItem>Russia</asp:ListItem>

        <asp:ListItem>Singapore</asp:ListItem>

        </asp:ListBox></td>

    <td colspan="2">

        <asp:Button ID="Button1" runat="server" Text=">" onclick="Button1_Click" />      

        <br />

        <asp:Button ID="Button3" runat="server" Text=">>" onclick="Button3_Click" />

        <br />

        <asp:Button ID="Button2"

            runat="server" Text="<" onclick="Button2_Click" />

        <br />

        <asp:Button ID="Button4" runat="server" Text="<<" onclick="Button4_Click" />

        </td>

    <td><asp:ListBox ID="lstbcity" runat="server" SelectionMode="Multiple"

            Height="96px" Width="97px">

        <asp:ListItem>Delhi</asp:ListItem>

        <asp:ListItem>London</asp:ListItem>

        <asp:ListItem>Tokyo</asp:ListItem>

        <asp:ListItem>Boston</asp:ListItem>

        <asp:ListItem>Moscow</asp:ListItem>

        </asp:ListBox></td></tr>

    </table>

       </fieldset>

C# code:

int i = 0;

protected void Button1_Click(object sender, EventArgs e)

    {

        try

        {

            lstbcity.Items.Add(lstbcountry.SelectedItem);

            i = lstbcountry.SelectedIndex;

            lstbcountry.Items.RemoveAt(i);

        }

        catch (Exception ex)

        {

        }

    }

    protected void Button2_Click(object sender, EventArgs e)

    {

        try

        {

            lstbcountry.Items.Add(lstbcity.SelectedItem);

            i = lstbcity.SelectedIndex;

            lstbcity.Items.RemoveAt(i);

        }

        catch (Exception ex)

        {

        }

    }

    protected void Button3_Click(object sender, EventArgs e)

    {

        try

        {

            for (i = 0; i <= lstbcountry.Items.Count - 1; i++)

            {

                lstbcity.Items.Add(lstbcountry.Items[i]);

            }

            lstbcountry.Items.Clear();

        }

        catch (Exception ex)

        {

        }       

    }

    protected void Button4_Click(object sender, EventArgs e)

    {

        try

        {

            for (i = 0; i <= lstbcity.Items.Count - 1; i++)

            {

                lstbcountry.Items.Add(lstbcity.Items[i]);

            }

            lstbcity.Items.Clear();

        }

        catch (Exception ex)

        {

        }

    }

VB code:

Dim i As Integer = 0

    Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click

        lstbcountry.Items.Add(lstbcity.SelectedItem)

        i = lstbcity.SelectedIndex

        lstbcity.Items.RemoveAt(i)

    End Sub

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click

        lstbcity.Items.Add(lstbcountry.SelectedItem)

        i = lstbcountry.SelectedIndex

        lstbcountry.Items.RemoveAt(i)

    End Sub

    Protected Sub Button3_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button3.Click

        Try

            For i = 0 To lstbcountry.Items.Count - 1

                lstbcity.Items.Add(lstbcountry.Items(i))

            Next

            lstbcountry.Items.Clear()

        Catch ex As Exception

        End Try

    End Sub

    Protected Sub Button4_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button4.Click

        Try

            For i = 0 To lstbcity.Items.Count - 1

                lstbcountry.Items.Add(lstbcity.Items(i))

            Next

            lstbcity.Items.Clear()

        Catch ex As Exception

        End Try

    End Sub

Build and run the project.

Output:

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