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Duplicate list item in code behind (simple)

/ Published in: C#
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  1. protected void Page_Load(object sender, EventArgs e)
  2. {
  3.     // http://www.example.com/page?nid=2
  4.     string nid = HttpContext.Current.Request.QueryString["nid"];
  5.  
  6.     if(!string.IsNullOrEmpty(nid))
  7.     {
  8.         using (SPSite site = SPContext.Current.Site)
  9.         {
  10.             using (SPWeb web = site.OpenWeb())
  11.             {
  12.                 // needed for list item update
  13.                 web.AllowUnsafeUpdates = true;
  14.                 // get list
  15.                 SPList list = web.Lists["ListA"];
  16.                 // get list item by Id from url
  17.                 SPListItem item = list.GetItemById(Convert.ToInt32(nid));
  18.                 // create new list item
  19.                 SPListItem itemCopy = list.Items.Add();
  20.                 // copy attributes
  21.                 itemCopy["Title"] = item.Title;
  22.                 // update db
  23.                 itemCopy.Update();
  24.                 // set back to default
  25.                 web.AllowUnsafeUpdates = false;
  26.             }
  27.         }
  28.     }
  29. }

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