Question

I have a query in microsoft Access that accepts few parameters. I’m looking for an example in C# that will let me be able to “Derive” parameters from the query first before populating them with values.

Can this be done? Please tell me how asap.

There are many questions like this in in other sites in the web but with no answer.

Answer 1

The only way I can see of doing this is with DAO, but there may be others.

DBEngine dbEng = new DBEngine();
Workspace Ws = dbEng.CreateWorkspace("", "admin", "", WorkspaceTypeEnum.dbUseJet);
Database Db = Ws.OpenDatabase(@"Z:\Docs\Test.accdb", false, false, "");

QueryDef qry = Db.QueryDefs["MyStoredQuery"];
foreach (Parameter prm in qry.Parameters)
{
    Console.WriteLine(prm.Name);
    Console.WriteLine(prm.Type);
}

The only way you will get an accurate type is if you include a Parameter statement :

PARAMETERS param1 Text ( 255 ), param2 Integer;