C# 长度超过40万的文本，保存到oracle clob字段中去

  protected   void  Page_Load( object  sender, EventArgs e)
        {
             if  ( this .Request.Files.Count  ==   0 )
            {
                 return ;
            }
            HttpPostedFile postedFile  =   this .Request.Files[ 0 ];
             int  ContentLength  =  postedFile.ContentLength;
             if  (ContentLength  ==   0 )
                 return ;

             byte [] bytes  =   new   byte [ContentLength];
            
             // 把上传的文件中的XML文本读出到string
            postedFile.InputStream.Read(bytes,  0 , ContentLength);
             string  tempStr  =  System.Text.Encoding.Default.GetString(bytes);
            
             // 获取使用 Little-Endian 字节顺序的 UTF-16 格式的编码。 
             // 因为OracleLob Clob存储是以UTF-16的合格，如果不转换就会保存成乱码
            bytes  =  System.Text.Encoding.Unicode.GetBytes(tempStr);
            ContentLength  =  bytes.Length;


             string  connString  =   " Data Source=owen;User Id=userid;Password=password;Integrated Security=no; " ;
            System.Data.OracleClient.OracleConnection conn  =   new  OracleConnection(connString);
             try
            {
                conn.Open();
                OracleTransaction trans  =  conn.BeginTransaction();

                OracleCommand command  =   new  OracleCommand();
                command.Transaction  =  trans;
                command.Connection  =  conn;
                command.CommandType  =  CommandType.Text;

                 // 获取临时clob
                command.CommandText  =   " declare xx clob; begin dbms_lob.createtemporary(xx, false, 0); :templob := xx; end; " ;
                command.Parameters.Add( new  OracleParameter( " templob " , OracleType.Clob)).Direction  =  ParameterDirection.Output;
                command.ExecuteNonQuery();
                
                OracleLob tmpclob  =  (OracleLob)command.Parameters[ 0 ].Value;
                 // end 获取临时clob
                tmpclob.Write(bytes,  0 , ContentLength);
                tmpclob.Position  =   0 ;
                trans.Commit();


                command.Parameters.Clear();
                command.CommandText  =   " pro_test1 " ;
                command.CommandType  =  CommandType.StoredProcedure;

                command.Parameters.Add( new  OracleParameter( " name " , Guid.NewGuid().ToString()));
                command.Parameters.Add( new  OracleParameter( " clob1 " , OracleType.Clob, ContentLength,
                ParameterDirection.Input,  true ,  0 ,  0 ,  "" , DataRowVersion.Current, tmpclob));

                command.ExecuteNonQuery();

                 this .Response.Write( " insert OK " );


            }
             catch  (Exception ex)
            {
                 this .Response.Write(ex.Message);
            }
             finally
            {
                 if  (conn  !=   null )
                    conn.Close();
            }
        }

数据库内容

 

create   table  TEST1
(
  NAME          VARCHAR2 ( 100 ),
  UPDATED_TIME DATE  default  sysdate,
  ROWS_COUNT    NUMBER   default   0 ,
  CLOB1        CLOB
)
/
create   or   replace   procedure  pro_test1(name  in   varchar2 ,clob1  in  clob)
as
  theXmlParser            dbms_xmlparser.Parser;
  theXmlDoc               dbms_xmldom.DOMDocument;
  theXmlNodeList          dbms_xmldom.DOMNodeList;
  rowsCount  number ( 10 );
begin
     theXmlParser : =  dbms_xmlparser.newParser;
     dbms_xmlparser.parseclob(theXmlParser, clob1);
     theXmlDoc : =  dbms_xmlparser.getDocument(theXmlParser);

     theXmlNodeList : =  dbms_xslprocessor.selectNodes(dbms_xmldom.makeNode(theXmlDoc), ' /table/row ' );
     rowsCount : =  dbms_xmldom.getLength(theXmlNodeList);
     
      insert   into  test1 (name,clob1,rows_count)  values  (name,clob1,rowsCount);
      commit ;
end  pro_test1;
/