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c#.net Input Byte[] into image

sweeney, karl

started a topic almost 6 years ago

I need to make the sql code in c# to execute to add a byte array as I am transferring the data from one database to another. I am able to get the data out of the first one and put all but the image(byte[]) into the second one

2 Comments

David McCallum

said almost 6 years ago

Have you tried:

INSERT INTO transfertable 
(f1, f2, f3,........., imagefield) 
SELECT f1, f2, f3,........., imagefield 
FROM originaltable

Kendall Miller

said almost 6 years ago

What you need to be sure when passing data into an INSERT command (or really any case you're passing data to a SQL statement) is that you use parameters. This preserves the .NET type all the way into the database engine. We have a few examples in our documentation at:

ADO.NET - Common Operations

but here's the relevant sample under Inserting Data using a Parameterized Command:

using (VistaDBConnection connection = new VistaDBConnection())
{
    connection.ConnectionString = @"Data Source=C:\mydatabase.vdb5";
    connection.Open();

    using (VistaDBCommand command = new VistaDBCommand())
    {
        int Age = 21;

        command.Connection = connection;
        command.CommandText = "INSERT INTO MyTable (MyColumn) VALUES (@age)";
        command.Parameters.Add("@age", Age);
        command.ExecuteNonQuery();
    }
}