2-12 SharePoint 应用程序也 Application Pages

新建应用程序页(自动回到  layouts 下application page文件夹下)

 

新建空元素，用于绑定菜单，指定该应用程序页

 

 

<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
    <CustomAction
     Id="MyTopMenuLink"
     Location="Microsoft.SharePoint.StandardMenu"
     GroupId="SiteActions"
     Sequence="0"
     Title="清空列表项">
        <UrlAction Url="/sites/topsite/_layouts/15/CustomApplicationPage/DemoApplicationPage.aspx"/>
    </CustomAction>
</Elements>

using System;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;

namespace CustomApplicationPage.Layouts.CustomApplicationPage
{
    public partial class DemoApplicationPage : LayoutsPageBase
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            using (SPSite site = new SPSite(SPContext.Current.Site.ID))
            {
                using (SPWeb web = site.OpenWeb(SPContext.Current.Web.ID))
                {
                    SPListCollection listcol = web.Lists;
                    foreach (SPList list in listcol)
                    {
                        System.Web.UI.WebControls.ListItem listitem = new System.Web.UI.WebControls.ListItem(list.Title);
                        DropDownList1.Items.Add(listitem);
                    }
                }
            }
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            using (SPSite site = new SPSite(SPContext.Current.Site.ID))
            {
                using (SPWeb web = site.OpenWeb(SPContext.Current.Web.ID))
                {
                    SPList list = web.Lists[DropDownList1.SelectedItem.Text];
                    SPListItemCollection items = list.Items;
                    foreach (SPListItem item in items)
                    {
                        list.GetItemById(item.ID).Delete();
                    }
                }
            }
        }
    }
}