Hi Antonio,

Are you using the IRISClient assembly from your IRIS 2024.1.0? 

I have Visual Studio 2022, I am using InterSystems.Data.IRISClient.dll from my C:\InterSystems\IRIS20241\dev\dotnet\bin\net7.0.

I have an image file 

03/28/2024  09:28 AM         5,261,669 myimage.png

I use following sample .Net app that I borrow from Cache 2018 and modify all Cache references with IRIS references, I have no problem inserting the 5.2MB image file into a blob field in my test table.

Harry

using System;
using System.IO;

// Add the following using statement
using InterSystems.Data.IRISClient;

namespace C_SharpConsoleExample
{
    /// <summary>
    /// Summary description for Class1.
    /// </summary>
    class ConsoleApp
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main(string[] args)
        {
            //
            // TODO: Add code to start application here
            //

            // Create a connection to Cache
            IRISConnection conn = new IRISConnection();

            // Cache server Connection Information
            // Set Server to your IP address and port to Cache SuperServer port, Log File is optional
            conn.ConnectionString = "Server = localhost; Log File=cprovider.log;Port=1972; Namespace=USER; Password = SYS; User ID = _SYSTEM;";

            //Open a Connection to Cache
            conn.Open();

            // Create table with streams
            IRISCommand dropCmd = new IRISCommand("drop table Sample.Streams", conn);
            try
            {
                dropCmd.ExecuteNonQuery();
            }
            catch (Exception ex)
            {
                //Do nothing
                string test = ex.Message;
            }

            // Create table with streams
            IRISCommand cmd = new IRISCommand("create table Sample.Streams(binaryData LONGVARBINARY, characterData LONGVARCHAR)", conn);
            cmd.ExecuteNonQuery();

            // Insert stream data into table
            cmd.CommandText = "insert into Sample.Streams(binaryData, characterData) values (?, ?)";

            // One way to mark the parameter as a binary stream datatype and then set the Value
            cmd.Parameters.Add(new IRISParameter("binaryData", IRISDbType.LongVarBinary));
            cmd.Parameters[0].Value = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

            // An alternate way to bind the data to the parameter and then mark the parameter as a character stream
            cmd.Parameters.Add(new IRISParameter("characterData", (string)"This is a short character stream!"));
            cmd.Parameters[1].IRISDbType = IRISDbType.LongVarChar;

            cmd.ExecuteNonQuery();

            // Now insert two files from disk as streams
            // Open binary file and read into byte[]
            // FileStream fbs = new System.IO.FileStream(".\\ConsoleStream.exe", System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite);
            FileStream fbs = new System.IO.FileStream(".\\myimage.png", System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite);
            int filebLen = (int)fbs.Length;
            byte[] filebData = new byte[filebLen];
            fbs.Read(filebData, 0, (int)filebLen);
            fbs.Close();
            cmd.Parameters[0].Value = filebData;
            cmd.Parameters[0].Size = filebLen;

            // Open character file and read into string
            StreamReader fcs = new StreamReader(new System.IO.FileStream(".\\cprovider.log", System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.ReadWrite));
            string filecData = fcs.ReadToEnd();
            int filecLen = filecData.Length;
            fcs.Close();
            cmd.Parameters[1].Value = filecData;
            cmd.Parameters[1].Size = filecLen;

            cmd.ExecuteNonQuery();

            cmd.Parameters.Clear();

            // Create an SQL Statement to execute (Command)
            cmd.CommandText = "select ID,* from Sample.Streams";

            // Execute and fetch the data from Cache
            IRISDataReader reader = cmd.ExecuteReader();
            Console.WriteLine("Output from statement: " + cmd.CommandText);
            Console.WriteLine(" ");
            Console.WriteLine("ID\tbinaryStream\t\tcharacterStream ");
            while (reader.Read())
            {
#if BYNUMBER
                // Access Column by Number
                Console.Write(reader[0]);
                Console.Write("\t");
                Console.Write(reader[1] + " : N/A");
                Console.Write("\t");
                Console.Write(reader[2]);
                Console.Write("\t");
                Console.WriteLine();
#else
                // Access Column by Name
                Console.Write(reader[reader.GetOrdinal("ID")]);
                Console.Write("\t");
                Console.Write(reader[reader.GetOrdinal("binaryData")] + " : N/A");
                Console.Write("\t");
                Console.Write(reader[reader.GetOrdinal("characterData")]);
                Console.Write("\t");
                Console.WriteLine();
#endif
            }
            Console.WriteLine("");
            Console.WriteLine("End of characterStream output!");

            // Cleanup Reader, Connection and Command
            reader.Close();
            cmd.Dispose();
            conn.Close();
        }
    }
}

Thanks, Evgeny.

I open a folder, the icon appears now.