C# Table of Blob

Question

I want to pass a collection of blob as a parameter in the procedure.
Collection of simple types I pass this way:
OracleParameter variable = new OracleParameter();
variable.ParameterName = "IN_VARIABLE";
variable.OracleDbType = OracleDbType.Object;
variable.UdtTypeName = "TYPE_NT_TBL_N";
variable.Direction = ParameterDirection.Input;
variable.Value = new TableOfNumber { Value = variables.ToArray() };
cmd.Parameters.Add(variable);
How do I pass a collection of blob?

Answer 1

This code worked for me.
I used ODT to generate the custom class originally, but it looks like a bug in what it generated. It generated the member as byte[][] and there was an initialization problem, so I changed it to OracleBlob[].
Hope it helps,
Greg
DDL
======
create table blobtable (col1 number, col2 blob);
create type blobtabtyp as table of blob;
procedure blobtabtypproc (b1 in blobtabtyp, n1 out number) as
begin
   for i in 1 .. b1.count loop
     insert into blobtable values(i,b1(i));
   end loop;
   n1 := b1.count;
end;PROGRAM.CS
===========
using System;
using Oracle.DataAccess.Client;
using Oracle.DataAccess.Types;
using System.Data;
namespace tableofblob
    class Program
        static void Main(string[] args)
            using(OracleConnection con = new OracleConnection("data source=orcl;user id=scott;password=tiger"))
                con.Open();
                OracleBlob[] blobs = new OracleBlob[5];
                for (int i=0;i<5;i++)
                    OracleBlob ob = new OracleBlob(con);
                    byte b = (byte)i;
                    byte[] ba = new byte[]{b,b,b,b,b,b};
                    ob.Write(ba, 0, ba.Length) ;
                    blobs[i] = ob;
                BLOBTABTYP btt = new BLOBTABTYP();
                btt.Value = blobs;
                using (OracleCommand cmd = new OracleCommand("blobtabtypproc", con))
                    cmd.CommandType = CommandType.StoredProcedure;
                    OracleParameter p1 = new OracleParameter("", OracleDbType.Object, ParameterDirection.Input);
                    p1.UdtTypeName = "SCOTT.BLOBTABTYP";
                    p1.Value = btt;
                    cmd.Parameters.Add(p1);
                    OracleParameter p2 = new OracleParameter("", OracleDbType.Int32, ParameterDirection.Output);
                    cmd.Parameters.Add(p2);
                    cmd.ExecuteNonQuery();
}BLOBTABTYP.CS
============
// <auto-generated>
//     This code was generated by a tool.
//     Runtime Version:2.0.50727.3615
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
namespace tableofblob {
    using System;
    using Oracle.DataAccess.Client;
    using Oracle.DataAccess.Types;
    using System.Xml.Serialization;
    using System.Xml.Schema;
    public class BLOBTABTYP : INullable, IOracleCustomType, IXmlSerializable {
        private bool m_IsNull;
        private OracleBlob[] m_BLOBTABTYP;
        private OracleUdtStatus[] m_statusArray;
        public BLOBTABTYP() {
            // TODO : Add code to initialise the object
        public BLOBTABTYP(string str) {
            // TODO : Add code to initialise the object based on the given string
        public virtual bool IsNull {
            get {
                return this.m_IsNull;
        public static BLOBTABTYP Null {
            get {
                BLOBTABTYP obj = new BLOBTABTYP();
                obj.m_IsNull = true;
                return obj;
        [OracleArrayMappingAttribute()]
        public virtual OracleBlob[] Value {
            get {
                return this.m_BLOBTABTYP;
            set {
                this.m_BLOBTABTYP = value;
        public virtual OracleUdtStatus[] StatusArray {
            get {
                return this.m_statusArray;
            set {
                this.m_statusArray = value;
        public virtual void FromCustomObject(Oracle.DataAccess.Client.OracleConnection con, System.IntPtr pUdt) {
            object objectStatusArray = ((object)(m_statusArray));
            OracleUdt.SetValue(con, pUdt, 0, this.m_BLOBTABTYP, objectStatusArray);
        public virtual void ToCustomObject(Oracle.DataAccess.Client.OracleConnection con, System.IntPtr pUdt) {
            object objectStatusArray = null;
            this.m_BLOBTABTYP = ((OracleBlob[])(OracleUdt.GetValue(con, pUdt, 0, out objectStatusArray)));
            this.m_statusArray = ((OracleUdtStatus[])(objectStatusArray));
        public virtual void ReadXml(System.Xml.XmlReader reader) {
            // TODO : Read Serialized Xml Data
        public virtual void WriteXml(System.Xml.XmlWriter writer) {
            // TODO : Serialize object to xml data
        public virtual XmlSchema GetSchema() {
            // TODO : Implement GetSchema
            return null;
        public override string ToString() {
            // TODO : Return a string that represents the current object
            return "";
        public static BLOBTABTYP Parse(string str) {
            // TODO : Add code needed to parse the string and get the object represented by the string
            return new BLOBTABTYP();
    // Factory to create an object for the above class
    [OracleCustomTypeMappingAttribute("SCOTT.BLOBTABTYP")]
    public class BLOBTABTYPFactory : IOracleCustomTypeFactory, IOracleArrayTypeFactory {
        public virtual IOracleCustomType CreateObject() {
            BLOBTABTYP obj = new BLOBTABTYP();
            return obj;
        public virtual System.Array CreateArray(int length) {
            OracleBlob[] collElem = new OracleBlob[length];
            return collElem;
        public virtual System.Array CreateStatusArray(int length) {
            OracleUdtStatus[] udtStatus = new OracleUdtStatus[length];
            return udtStatus;
}