У меня есть эта проблема в реализации LINQ. Ошибки, которые я получаю, включены в код в виде комментариев
public partial class _Default : Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
GridViewBind(string.Empty);
}
}
private void GridViewBind(string criteria)
{
string strConn = ConfigurationManager.ConnectionStrings["linqconnstr"].ConnectionString;
MyDB _db = new MyDB(strConn);
IEnumerable<UserRecord> results;
if(criteria == string.Empty)
{
// 'System.Data.Linq.Table<UserRecord>' does not contain a definition
// for 'ToArray' and no extension method 'ToArray' accepting a first
// argument of type 'System.Data.Linq.Table<UserRecord>' could be found
// (are you missing a using directive or an assembly reference?)
results = _db.user.ToArray(); // error line under .ToArray();
}
else
{
// Could not find an implementation of the query pattern for source
// type 'System.Data.Linq.Table<UserRecord>'. 'Where' not found.
// are you missing a reference to 'System.Core.dll' or a using
// directive for 'System.Linq'? // error line under _db
results = (from c in _db.user
where c.Username.Contains(criteria)
select c).ToArray();
}
gvwUsers.DataSource = results;
gvwUsers.DataBind();
}
}
Вот другие классы:
public class MyDB : DataContext
{
public MyDB(string connStr) : base(connStr)
{
}
public Table<UserRecord> user;
}
[Table(Name = "tblUsers")]
public class UserRecord
{
[Column(IsDbGenerated = true, IsPrimaryKey = true)]
public int UserID { get; set; }
[Column(DbType = "nvarchar(30)")]
public string Username { get; set; }
[Column(DbType = "nvarchar(30)")]
public string Password { get; set; }
}