I am trying to build a .NET web application using SQL to query AS400 database. This is my first time encountering the AS400.
What do I have to install on my machine (or the AS400 server) in order to connect? (IBM iSeries Access for Windows ??)
What are the components of the connection string?
Where can I find sample codes on building the Data Access Layer using SQL commands?
Thanks.
Extremely old question - but this is still relevant. I needed to query our AS/400 using .NET but none of the answers above worked and so I ended up creating my own method using OleDb:
public DataSet query_iseries(string datasource, string query, string[] parameterName, string[] parameterValue)
{
try
{
// Open a new stream connection to the iSeries
using (var iseries_connection = new OleDbConnection(datasource))
{
// Create a new command
OleDbCommand command = new OleDbCommand(query, iseries_connection);
// Bind parameters to command query
if (parameterName.Count() >= 1)
{
for (int i = 0; i < parameterName.Count(); i++)
{
command.Parameters.AddWithValue("@" + parameterName[i], parameterValue[i]);
}
}
// Open the connection
iseries_connection.Open();
// Create a DataSet to hold the data
DataSet iseries_data = new DataSet();
// Create a data adapter to hold results of the executed command
using (OleDbDataAdapter data_adapter = new OleDbDataAdapter(command))
{
// Fill the data set with the results of the data adapter
data_adapter.Fill(iseries_data);
}
return iseries_data;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return null;
}
}
And you would use it like so:
DataSet results = query_iseries("YOUR DATA SOURCE", "YOUR SQL QUERY", new string[] { "param_one", "param_two" }, new string[] { "param_one_value", "param_two_value"});
It returns a DataSet of the results returned. If anyone needs/wants a method for inserting/updating values within the IBM AS/400, leave a comment and I'll share...