Question

i’m implementing a sand box solution where is should have more than one column a unique key, i have to use the item adding event receiver but how to get the current adding item field values to know if this item is occurred within the list.

thanks

Answer 1

1. Create UniqueID column and make it unique.

2. Create an event receiver as follows:

   public override void ItemAdding(SPItemEventProperties properties)
   {
       string Name = properties.AfterProperties["Name"].ToString();
       string Title = properties.AfterProperties["Title"].ToString();
       StringBuilder StringBuilder = new StringBuilder(Name);
       StringBuilder.Append("-");
       StringBuilder.Append(Title);
       properties.AfterProperties["UniqueID0"] = StringBuilder.ToString();
       base.ItemAdding(properties);
   }