IBM® Informix® Client Software Development Kit, Version 4.10

Write CLOBs to files

The example in this topic connects to the superstores_demo database and writes all of the CLOBs in the table catalog into files in the directory C:\tmp. The same technique is used to write BLOBs to files.

Note that the IfxClob instance must be opened before it is accessed.

For more information about the IfxClob class see IfxClob class.

try 
{
    // Open a connection
    IfxConnection conn = 
        new IfxConnection(
        "Host=myhost;" +
        "Service=1576;" +
        "Server=mydbserver;"+
        "Database=superstores_demo;" +
        "User ID=mylogin;password=mypassword"
        );
    conn.Open();

    // Create an SQL command
    IfxCommand cmd = new IfxCommand(
        "SELECT advert_descr, catalog_num FROM catalog", 
        conn 
        );
    IfxDataReader dr = cmd.ExecuteReader();

    // Write any CLOBs to files in C:\tmp
    while (dr.Read())
    {
        if(!dr.IsDBNull(0)){
            IfxClob c = dr.GetIfxClob(0);
            long num = dr.GetInt64(1);

            c.Open(IBM.Data.Informix.IfxSmartLOBOpenMode.ReadOnly);
            c.ToFile(
                "C:\\tmp\\" + num.ToString() + ".txt", 
                System.IO.FileMode.Create,
                IfxSmartLOBFileLocation.Client
                );
        }
    }
    dr.Close();

    // Close the connection
    conn.Close();
}
catch(Exception e) 
{
    //This is assumed to be a console application
    Console.WriteLine(e.ToString());
}


Examples exchange | Troubleshooting

To find the PDF, see Publications for the IBM Informix 12.10 family of products.
For the release notes, documentation notes, and/or machine notes, see the Release Notes page.