Episerver wastebasket plugin that let admins do simple filtering and delete a single content instead of emptying the whole wastebasket.

Basket.aspx

<%@ Page Language="c#" CodeBehind="Basket.aspx.cs" AutoEventWireup="False" Inherits="NergardPlayGround.modules.WasteBasket.Basket" Title="" %>

<%@ Import Namespace="EPiServer.Web.Mvc.Html" %>

<asp:content contentplaceholderid="HeaderContentRegion" runat="server">
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
    <script type="text/javascript" src="//cdn.datatables.net/1.10.16/js/jquery.dataTables.min.js"></script>
    <script type="text/javascript">

        $(document).ready(function () {
            $('#tabell').DataTable();
        });

        function SetSelected() {
            var ids = [];
            $('#tabell input[type="checkbox"]:checked').each(function () {
                ids.push(this.value);
            });

            $('#SelectedContent').val(ids.join(','));
        }

    </script>
</asp:content>

<asp:content contentplaceholderid="MainRegion" runat="server">
    <link rel="stylesheet" type="text/css" href="//cdn.datatables.net/1.10.16/css/jquery.dataTables.min.css">

    <asp:HiddenField runat="server" id="SelectedContent" ClientIDMode="static" />

    <div class="epi-formArea epi-paddingVertical-small">
        
        <fieldset>
            <legend>Actions</legend>

            <span class="epi-cmsButton">
                <input id="btnDeleteAll" runat="server" type="button" value="Delete all" class="epi-cmsButton-text epi-cmsButton-tools epi-cmsButton-Save" onmouseover="EPi.ToolButton.MouseDownHandler(this)" onmouseout="EPi.ToolButton.ResetMouseDownHandler(this)">                      
            </span>
            <span class="epi-cmsButton">
                <input id="btnDeleteSelected" runat="server" type="button" value="Delete selected" onclick="SetSelected();" class="epi-cmsButton-text epi-cmsButton-tools epi-cmsButton-Save" onmouseover="EPi.ToolButton.MouseDownHandler(this)" onmouseout="EPi.ToolButton.ResetMouseDownHandler(this)">                      
            </span>

        </fieldset>

        <table id="tabell" class="blueTable">
            <thead>
                <tr>
                    <th>ContentLink</th>
                    <th>Type</th>
                    <th>Name</th>
                    <th>Choosen</th>
                </tr>
            </thead>
            <tbody>
                <asp:Repeater runat="server" ID="rptBasketContent">
                    <ItemTemplate>
                        <tr>
                            <td><%#BasketItem.ContentLink %></td>
                            <td><%# GetContentTypeDisplayName (BasketItem.ContentTypeID) %></td>
                            <td><%#BasketItem.Name %></td>
                            <td><input type="checkbox" value="<%#BasketItem.ContentLink %>" /></td>
                        </tr>
                    </ItemTemplate>
                </asp:Repeater>         
            </tbody>
        </table>
</asp:content>

Basket.aspx.cs

using System;
using System.Collections.Generic;
using System.Web.Security;
using System.Web.UI.WebControls;
using EPiServer.Personalization;
using EPiServer.PlugIn;
using EPiServer.Security;
using EPiServer.Util.PlugIns;
using System.Web.UI;
using EPiServer.Shell.WebForms;
using EPiServer;
using EPiServer.Core;
using EPiServer.ServiceLocation;
using System.Web.Mvc;
using System.Linq;

namespace NergardPlayGround.modules.WasteBasket
{
    [GuiPlugIn(DisplayName = "Wastebasket", Description = "", Area = PlugInArea.AdminMenu, Url = "~/modules/WasteBasket/Basket.aspx")]
    public partial class Basket : WebFormsBase
    {
        #region var and props
        protected UrlHelper Url = ServiceLocator.Current.GetInstance<UrlHelper>();
        protected IContent BasketItem { get { return Page.GetDataItem() as IContent; } }    
        #endregion

        #region overrides
        protected override void OnPreInit(EventArgs e)
        {
            base.OnPreInit(e); 
            
            MasterPageFile = UriSupport.ResolveUrlFromUIBySettings("MasterPages/EPiServerUI.master");
            SystemMessageContainer.Heading = "Wastebasket";
            SystemMessageContainer.Description = "Simple plugin that displays the content of the wastebasket and let you perform simple filtering / searching, and deleting all or just selected content.";
        }

        protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);
            btnDeleteAll.ServerClick += BtnDeleteAll_ServerClick;
            btnDeleteSelected.ServerClick += BtnDeleteSelected_ServerClick;
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            DataBindTable();

        }
        #endregion

        #region Eventhandlers
        private void BtnDeleteAll_ServerClick(object sender, EventArgs e)
        {
            var allContent = GetBasketContent();
            foreach (var content in allContent)
            { 
                ContentRepository.Delete(content.ContentLink, true, AccessLevel.NoAccess);
            }

            DataBindTable();
        }

        private void BtnDeleteSelected_ServerClick(object sender, EventArgs e)
        {
            var allContent = SelectedContent.Value.Split("'".ToCharArray());

            foreach (var content in allContent)
            {
                ContentRepository.Delete(ContentReference.Parse(content), true, AccessLevel.NoAccess);
            }

            DataBindTable();

        }
        #endregion

        #region Methods

        private void DataBindTable()
        {
            rptBasketContent.DataSource = GetBasketContent();
            rptBasketContent.DataBind();
        }

        private IEnumerable<IContent> GetBasketContent()
        {
            return ContentRepository.GetChildren<IContent>(ContentReference.WasteBasket);
        }

        protected string GetContentTypeDisplayName(int id)
        {
            return ContentTypeRepository.Load(id).Name;
        }
        #endregion 


    }
}

Basket.aspx.designer.cs

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated. 
// </auto-generated>
//------------------------------------------------------------------------------

namespace NergardPlayGround.modules.WasteBasket {
    
    
    public partial class Basket {
        
        /// <summary>
        /// SelectedContent control.
        /// </summary>
        /// <remarks>
        /// Auto-generated field.
        /// To modify move field declaration from designer file to code-behind file.
        /// </remarks>
        protected global::System.Web.UI.WebControls.HiddenField SelectedContent;
        
        /// <summary>
        /// btnDeleteAll control.
        /// </summary>
        /// <remarks>
        /// Auto-generated field.
        /// To modify move field declaration from designer file to code-behind file.
        /// </remarks>
        protected global::System.Web.UI.HtmlControls.HtmlInputButton btnDeleteAll;
        
        /// <summary>
        /// btnDeleteSelected control.
        /// </summary>
        /// <remarks>
        /// Auto-generated field.
        /// To modify move field declaration from designer file to code-behind file.
        /// </remarks>
        protected global::System.Web.UI.HtmlControls.HtmlInputButton btnDeleteSelected;
        
        /// <summary>
        /// rptBasketContent control.
        /// </summary>
        /// <remarks>
        /// Auto-generated field.
        /// To modify move field declaration from designer file to code-behind file.
        /// </remarks>
        protected global::System.Web.UI.WebControls.Repeater rptBasketContent;
    }
}

gistfile1.txt

<%@ Page Language="c#" CodeBehind="Basket.aspx.cs" AutoEventWireup="False" Inherits="NergardPlayGround.modules.WasteBasket.Basket" Title="" %>

<%@ Import Namespace="EPiServer.Web.Mvc.Html" %>

<asp:content contentplaceholderid="HeaderContentRegion" runat="server">
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
    <script type="text/javascript" src="//cdn.datatables.net/1.10.16/js/jquery.dataTables.min.js"></script>
    <script type="text/javascript">

        $(document).ready(function () {
            $('#tabell').DataTable();
        });

        function SetSelected() {
            var ids = [];
            $('#tabell input[type="checkbox"]:checked').each(function () {
                ids.push(this.value);
            });

            $('#SelectedContent').val(ids.join(','));
        }

    </script>
</asp:content>

<asp:content contentplaceholderid="MainRegion" runat="server">
    <link rel="stylesheet" type="text/css" href="//cdn.datatables.net/1.10.16/css/jquery.dataTables.min.css">

    <asp:HiddenField runat="server" id="SelectedContent" ClientIDMode="static" />

    <div class="epi-formArea epi-paddingVertical-small">
        
        <fieldset>
            <legend>Actions</legend>

            <span class="epi-cmsButton">
                <input id="btnDeleteAll" runat="server" type="button" value="Delete all" class="epi-cmsButton-text epi-cmsButton-tools epi-cmsButton-Save" onmouseover="EPi.ToolButton.MouseDownHandler(this)" onmouseout="EPi.ToolButton.ResetMouseDownHandler(this)">                      
            </span>
            <span class="epi-cmsButton">
                <input id="btnDeleteSelected" runat="server" type="button" value="Delete selected" onclick="SetSelected();" class="epi-cmsButton-text epi-cmsButton-tools epi-cmsButton-Save" onmouseover="EPi.ToolButton.MouseDownHandler(this)" onmouseout="EPi.ToolButton.ResetMouseDownHandler(this)">                      
            </span>

        </fieldset>

        <table id="tabell" class="blueTable">
            <thead>
                <tr>
                    <th>ContentLink</th>
                    <th>Type</th>
                    <th>Name</th>
                    <th>Choosen</th>
                </tr>
            </thead>
            <tbody>
                <asp:Repeater runat="server" ID="rptBasketContent">
                    <ItemTemplate>
                        <tr>
                            <td><%#BasketItem.ContentLink %></td>
                            <td><%# GetContentTypeDisplayName (BasketItem.ContentTypeID) %></td>
                            <td><%#BasketItem.Name %></td>
                            <td><input type="checkbox" value="<%#BasketItem.ContentLink %>" /></td>
                        </tr>
                    </ItemTemplate>
                </asp:Repeater>         
            </tbody>
        </table>
</asp:content>

using System;
using System.Collections.Generic;
using System.Web.Security;
using System.Web.UI.WebControls;
using EPiServer.Personalization;
using EPiServer.PlugIn;
using EPiServer.Security;
using EPiServer.Util.PlugIns;
using System.Web.UI;
using EPiServer.Shell.WebForms;
using EPiServer;
using EPiServer.Core;
using EPiServer.ServiceLocation;
using System.Web.Mvc;
using System.Linq;

namespace NergardPlayGround.modules.WasteBasket
{
    [GuiPlugIn(DisplayName = "Wastebasket", Description = "", Area = PlugInArea.AdminMenu, Url = "~/modules/WasteBasket/Basket.aspx")]
    public partial class Basket : WebFormsBase
    {
        #region var and props
        protected UrlHelper Url = ServiceLocator.Current.GetInstance<UrlHelper>();
        protected IContent BasketItem { get { return Page.GetDataItem() as IContent; } }    
        #endregion

        #region overrides
        protected override void OnPreInit(EventArgs e)
        {
            base.OnPreInit(e); 
            
            MasterPageFile = UriSupport.ResolveUrlFromUIBySettings("MasterPages/EPiServerUI.master");
            SystemMessageContainer.Heading = "Wastebasket";
            SystemMessageContainer.Description = "Simple plugin that displays the content of the wastebasket and let you perform simple filtering / searching, and deleting all or just selected content.";
        }

        protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);
            btnDeleteAll.ServerClick += BtnDeleteAll_ServerClick;
            btnDeleteSelected.ServerClick += BtnDeleteSelected_ServerClick;
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            DataBindTable();

        }
        #endregion

        #region Eventhandlers
        private void BtnDeleteAll_ServerClick(object sender, EventArgs e)
        {
            var allContent = GetBasketContent();
            foreach (var content in allContent)
            { 
                ContentRepository.Delete(content.ContentLink, true, AccessLevel.NoAccess);
            }

            DataBindTable();
        }

        private void BtnDeleteSelected_ServerClick(object sender, EventArgs e)
        {
            var allContent = SelectedContent.Value.Split("'".ToCharArray());

            foreach (var content in allContent)
            {
                ContentRepository.Delete(ContentReference.Parse(content), true, AccessLevel.NoAccess);
            }

            DataBindTable();

        }
        #endregion

        #region Methods

        private void DataBindTable()
        {
            rptBasketContent.DataSource = GetBasketContent();
            rptBasketContent.DataBind();
        }

        private IEnumerable<IContent> GetBasketContent()
        {
            return ContentRepository.GetChildren<IContent>(ContentReference.WasteBasket);
        }

        protected string GetContentTypeDisplayName(int id)
        {
            return ContentTypeRepository.Load(id).Name;
        }
        #endregion 


    }
}
//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated. 
// </auto-generated>
//------------------------------------------------------------------------------

namespace NergardPlayGround.modules.WasteBasket {
    
    
    public partial class Basket {
        
        /// <summary>
        /// SelectedContent control.
        /// </summary>
        /// <remarks>
        /// Auto-generated field.
        /// To modify move field declaration from designer file to code-behind file.
        /// </remarks>
        protected global::System.Web.UI.WebControls.HiddenField SelectedContent;
        
        /// <summary>
        /// btnDeleteAll control.
        /// </summary>
        /// <remarks>
        /// Auto-generated field.
        /// To modify move field declaration from designer file to code-behind file.
        /// </remarks>
        protected global::System.Web.UI.HtmlControls.HtmlInputButton btnDeleteAll;
        
        /// <summary>
        /// btnDeleteSelected control.
        /// </summary>
        /// <remarks>
        /// Auto-generated field.
        /// To modify move field declaration from designer file to code-behind file.
        /// </remarks>
        protected global::System.Web.UI.HtmlControls.HtmlInputButton btnDeleteSelected;
        
        /// <summary>
        /// rptBasketContent control.
        /// </summary>
        /// <remarks>
        /// Auto-generated field.
        /// To modify move field declaration from designer file to code-behind file.
        /// </remarks>
        protected global::System.Web.UI.WebControls.Repeater rptBasketContent;
    }
}