二进制流分步写入数据库实现(SPS中实现)

先利用WSS的接口，添加文档doc 

//        SqlConnection cn=new SqlConnection(ConfigurationSettings.AppSettings["Sps_SITE"].ToString());
//        cn.Open();
//        SqlCommand cmd=cn.CreateCommand();
//        doc = folder.AddDocument(fileName, new byte[0], false);
//        try
//        {
//         doc.ID = Convert.ToInt32(doc.SPFile.Item["ID"]);
//         //改变大小
//         cmd.CommandText="update docs set Size="+FileSize.ToString()+" where DoclibRowId="+doc.ID+" and listid='"+docLibGuid+"' ";
//         cmd.ExecuteNonQuery();
//
//         cmd.CommandText="declare @content varbinary(16) "
//          +" select @content=textptr(content) from docs where DoclibRowId="+doc.ID+" and listid='"+docLibGuid+"' "
//          +" updatetext docs.content @content @length 0 @block";
//         cmd.Parameters.Add("@block",System.Data.SqlDbType.Image);
//         cmd.Parameters.Add("@length",System.Data.SqlDbType.Int);
//         int len=8040000;
//         byte[] DoubleBuffer = new byte[len];
//         int iRead = 0;
//         while (iRead<FileSize)
//         {
//          SingleFile.InputStream.Read(DoubleBuffer,0,len);
//          cmd.Parameters["@block"].Value=DoubleBuffer;
//          cmd.Parameters["@length"].Value=iRead;
//          cmd.ExecuteNonQuery();
//          iRead += len;
//         }
//        }
//        catch (Exception ex)
//        {
//         folder.DeleteDocument(fileName);
//         throw ex;
//        }
//        finally
//        {
//         cn.Close();
//         cn.Dispose();
//        }