Add/Edit/Read SharePoint task attachment programmatically

In this article I am going to show how you can Add/Edit/Read SharePoint task attachment programmatically. Here is the sample code;

Save Attachment

bool saveAttachments(string attachFilePath, string list, int taskID)

        {

            try

            {

                using (SPWeb web = site.OpenWeb())

                {

                    SPList Selectedlist = web.Lists[list];

                    SPListItem itemToUpdate = Selectedlist.GetItemById(taskID);

                    FileStream stream = new FileStream(@attachFilePath, ileMode.Open);

                    byte[] byteArray = new byte[stream.Length];

                    stream.Read(byteArray, 0, Convert.ToInt32(stream.Length));

                    stream.Close();

                    itemToUpdate.Attachments.Add(attachFile, byteArray);

                    itemToUpdate.Update();

                    return true;

                }

            }

            catch (Exception ex)

            {

                MessageBox.Show("Couldn't save the attachment" + Environment.NewLine + ex.Message, "Message");

                return false;

            }

        }

 

Remove Attachment

private void btnremoveAttach_Click(object sender, EventArgs e)

      {

          try

          {

              if (dataGridViewAttachments.CurrentRow != null)

              {

                   DialogResult dr = MessageBox.Show("Are you sure to delete the attachment?", "Message", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);

                   if (dr == System.Windows.Forms.DialogResult.Yes)

                   {

                       string name = dataGridViewAttachments.CurrentRow.Cells["Attachments"].Value.ToString();

                       using (SPWeb web = site.OpenWeb())

                       {

                           SPList Selectedlist = web.Lists[list];

                           SPListItem item = Selectedlist.GetItemById(taskID);

                           SPAttachmentCollection AttachmentCollection = item.Attachments;

                           item.Attachments.Delete(name);

                           item.Update();

                       }

                   }

              }

          }

          catch (Exception ex)

          {

              MessageBox.Show("Couldn't delete the attachment." + Environment.NewLine + ex.Message, "Message");

              return ;

          }

      }

Read Attachment

bool GetAttachments(string attachFilePath, string list, int taskID)

        {

            try

            {   sing (SPWeb web = site.OpenWeb())

                {

                    SPList Selectedlist = web.Lists[list];

                    SPListItem item = Selectedlist.GetItemById(taskID);                      SPAttachmentCollection AttachmentCollection = item.Attachments;

                    if (AttachmentCollection.Count > 0)

                    {

                        SPFolder folder = web.Folders["Lists"].SubFolders[list].SubFolders["Attachments"].SubFolders[item.ID.ToString()];

                        foreach (SPFile file in folder.Files)

                        {

                            DataRow dr = dtAttachment.NewRow();

                            dr["Name"] = file.Name;

                            dtAttachment.Rows.Add(dr);

                        }

                    }

                }

            }

            catch (Exception ex)

            {

                MessageBox.Show("Couldn't read the attachment details" + Environment.NewLine + ex.Message, "Message");

                return false;

            }