public static T row <T>(this sqlite3_stmt stmt) where T : new()
{
Type typ = typeof(T);
var obj = new T();
for (int i = 0; i < stmt.column_count(); i++)
{
string colname = stmt.column_name(i);
#if OLD_REFLECTION
var prop = typ.GetProperty(colname);
#else
var prop = typ.GetTypeInfo().GetDeclaredProperty(colname);
#endif
if (
(null != prop) &&
prop.CanWrite
)
{
prop.SetValue(obj, stmt.column(i, prop.PropertyType), null);
}
else
{
throw new NotSupportedException("property not found");
}
}
return(obj);
}
public static T query_scalar <T>(this sqlite3 db, string sql, params object[] a)
{
using (sqlite3_stmt stmt = db.prepare(sql, a))
{
stmt.step();
return(stmt.column <T>(0));
}
}
public static IEnumerable <T> query_one_column <T> (this sqlite3 db, string sql, params object[] a)
{
using (sqlite3_stmt stmt = db.prepare(sql, a))
{
if (1 != stmt.column_count())
{
throw new InvalidOperationException("the SELECT expression for query_one_column() must have exactly one column");
}
while (raw.SQLITE_ROW == stmt.step())
{
yield return(stmt.column <T>(0));
}
}
}
public static T column <T>(this sqlite3_stmt stmt, int index)
{
return((T)stmt.column(index, typeof(T)));
}