SharePoint 批量打包zip下载列表项ListItem附件

1. 下载DotNetZip（Ionic.zip.dll）

2. 代码

       protected void AllDown_Click(Object sender, EventArgs e)
        {
            int itemID;
            if (Request.QueryString["ItemID"] != null)
            {
                itemID = int.Parse(Request.QueryString["itemID"].ToString());
                SPWeb web = SPContext.Current.Site.OpenWeb("子网站名字");
                web.AllowUnsafeUpdates = true;