What can be used instead of Datatable in LINQ
- by Kabi
I have a SQL query that returns a Datatable:
var routesTable = _dbhelper.Select("SELECT [RouteId],[UserId],[SourceName],[CreationTime] FROM [Routes] WHERE UserId=@UserId AND RouteId=@RouteId", inputParams);
and then we can work with Datatable object of routesTable
if (routesTable.Rows.Count == 1)
{
result = new Route(routeId)
{
Name = (string)routesTable.Rows[0]["SourceName"],
Time = routesTable.Rows[0]["CreationTime"] is DBNull ? new DateTime() : Convert.ToDateTime(routesTable.Rows[0]["CreationTime"])
};
result.TrackPoints = GetTrackPointsForRoute(routeId);
}
I want to change this code to linq but I don't know how can I simulate Datatable in LINQ ,I wrote this part:
Route result = null;
aspnetdbDataContext aspdb = new aspnetdbDataContext();
var Result = from r in aspdb.RouteLinqs
where r.UserId == userId && r.RouteId==routeId
select r;
....
but I don't know how can I change this part:
if (routesTable.Rows.Count == 1)
{
result = new Route(routeId)
{
Name = (string)routesTable.Rows[0]["SourceName"],
Time = routesTable.Rows[0]["CreationTime"] is DBNull ? new DateTime() : Convert.ToDateTime(routesTable.Rows[0]["CreationTime"])
};
would you please tell me how can I do this?
EDIT
here you can see the whole block of code in original
public Route GetById(int routeId, Guid userId)
{
Route result = null;
var inputParams = new Dictionary<string, object>
{
{"UserId", userId},
{"RouteId", routeId}
};
var routesTable = _dbhelper.Select("SELECT [RouteId],[UserId],[SourceName],[CreationTime] FROM [Routes] WHERE UserId=@UserId AND RouteId=@RouteId", inputParams);
if (routesTable.Rows.Count == 1)
{
result = new Route(routeId)
{
Name = (string)routesTable.Rows[0]["SourceName"],
Time = routesTable.Rows[0]["CreationTime"] is DBNull ? new DateTime() : Convert.ToDateTime(routesTable.Rows[0]["CreationTime"])
};
result.TrackPoints = GetTrackPointsForRoute(routeId);
}
return result;
}
