Use API to Attach Files as Primary Link and Secondary Link to Existing Item

public void AssignFileToItem(ItemService itemSvc, Item selectedItem,

  File file1, File file2)

{

  ItemsAndFiles promoteResult = null;

  Item[] updatedItems = null;

 

  long itemId1 = -1;

  long itemId2 = -1;

  try

  {

    // firstly promote files to items

    // this example assumes that only 1 item will result from the promote

 

    promoteResult = itemSvc.PromoteFiles(new long[] { file1.Id, file2.Id });

 

    // Obtain the new items for files

 

    foreach (ItemFileAssoc assoc in promoteResult.FileAssocArray)

    {

      if (assoc.CldFileId == file1.Id)

      {

        itemId1 = assoc.ParItemId;

      }

      if (assoc.CldFileId == file2.Id)

      {

        itemId2 = assoc.ParItemId;

      }

    }

    if (itemId1 < 0 || itemId2 < 0)

    {

      MessageBox.Show("Promote error");

    }

    else

    {

      //next reassign an existing item to the files

 

      updatedItems = itemSvc.ReassignComponentsToDifferentItems(

      new long[] { itemId1, itemId2 },

                      new long[] { selectedItem.Id, selectedItem.Id });

 

      // commit the changes

      itemSvc.UpdateAndCommitItems(updatedItems);

    }

  }

  catch

  {

    if (updatedItems != null && updatedItems.Length > 0)

    {

&
#160;     long[] itemIds = new long[updatedItems.Length];

      for (int i = 0; i < updatedItems.Length; i++)

      {

        itemIds[i] = updatedItems[i].Id;

      }

      itemSvc.UndoEditItems(itemIds);

    }

  }

  finally

  {

    if (promoteResult != null)

    {

      // clear out the unused items

 

      itemSvc.DeleteUnusedItemNumbers(new long[] { promoteResult.

        ItemRevArray[0].MasterId, promoteResult.ItemRevArray[0].MasterId });

 

      itemSvc.UndoEditItems(new long[] { itemId1, itemId2 });

    }

  }

}

private void button1_Click(object sender, EventArgs e)

{

  PropDef[] propDefs = m_serviceManager.PropertyService.

    GetPropertyDefinitionsByEntityClassId("FILE");

  PropDef fileNamePropDef = null;

 

  foreach (PropDef propDef in propDefs)

  {

    if (propDef.SysName == "ClientFileName")

    {

      fileNamePropDef = propDef;

      break;

    }

  }

 

  // Searches specified files in the Vault. 

  // If there are too many hits for a single search, the function loops

  // till all results are returned.

 

  string bookmark = String.Empty;

  SrchStatus searchStatus = null;

  List<File> files = new List<File>();

 

  SrchCond currentCond = new SrchCond();

  currentCond.PropTyp = PropertySearchType.SingleProperty;

  currentCond.S
rchOper = 3; //is exactly

  currentCond.SrchRule = SearchRuleType.May;

  currentCond.PropDefId = fileNamePropDef.Id;

  currentCond.SrchTxt = "Part5.ipt";

 

  while (searchStatus == null || files.Count < searchStatus.TotalHits)

  {

    File[] results = m_serviceManager.DocumentService.

      FindFilesBySearchConditions(

        new SrchCond[]{currentCond}, null, null, true, true, ref bookmark,

        out searchStatus);

 

    if (results != null)

      files.AddRange(results);

  }

  File file1 = files.ToArray()[0];

  files.Clear();

 

  searchStatus = null;

  bookmark = String.Empty;

  currentCond.SrchTxt = "Part6.ipt";

  while (searchStatus == null || fi
les.Count < searchStatus.TotalHits)

  {

    File[] results = m_serviceManager.DocumentService.

      FindFilesBySearchConditions(

        new SrchCond[] { currentCond }, null, null, true, true, ref bookmark,

        out searchStatus);

 

    if (results != null)

      files.AddRange(results);

  }

  File file2 = files.ToArray()[0];

 

  AssignFileToItem(m_serviceManager.ItemService, m_selectedItem, file1, file2);

}