我已经使用SQLdependency和SignalR向用户显示警报..代码如下:
public IEnumerable<AlertInfo> GetData(long UserId)
{
using (var connection = new SqlConnection(ConfigurationManager.ConnectionStrings["yafnet"].ConnectionString))
{
connection.Open();
using (SqlCommand command = new SqlCommand(@"SELECT [AlertID],[AlertNote],[AlertDetails],[AlertDate],[Location]
FROM [dbo].[Alerts] where [UserID]=" + UserId + " AND [IsViewed]=0", connection))
{
// Make sure the command object does not already have
// a notification object associated with it.
command.Notification = null;
SqlDependency.Stop(ConfigurationManager.ConnectionStrings["yafnet"].ConnectionString);
SqlDependency.Start(ConfigurationManager.ConnectionStrings["yafnet"].ConnectionString);
SqlDependency dependency = new SqlDependency(command);
dependency.OnChange += new OnChangeEventHandler(dependency_OnChange);
if (connection.State == ConnectionState.Closed)
connection.Open();
using (var reader = command.ExecuteReader())
return reader.Cast<IDataRecord>()
.Select(x => new AlertInfo()
{
AlertID = x.GetInt64(0),
AlertNote = x.GetString(1),
AlertDetails = x.GetString(2),
AlertDate = x.GetDateTime(3),
Location = x.GetString(4)
}).ToList();
}
}
}
它在localhost上工作正常。但上传到Azure服务器后,此方法会引发以下错误:
消息“:”发生错误。“,”ExceptionMessage“:”语句'RECEIVE MSG'不受支持 在此版本的SQL Server中。“,”ExceptionType“:”System.Data.SqlClient.SqlException“,”StackTrace“:” \ r \ n服务器堆栈跟踪:\ r \ n在System.Data.SqlClient.SqlConnection.OnError(SqlException异常) ,Boolean breakConnection,Action`1 wrapCloseInAction)
可能是什么问题?
答案 0 :(得分:0)
实际上您的SQL Server数据库必须有is_broker_enabled = 1
。
您需要检查它是否已启用。
要验证这一点,请使用命令SELECT name, is_broker_enabled FROM sys.databases
。
如果您的数据库显示结果为“1”,则表示没有问题,如果为“0”,则必须使用此命令ALTER DATABASE yourdb SET ENABLE_BROKER
启用它。
但坏消息是Azure SQL数据库显示已启用但不再支持is_broker_enabled
。
为此,您需要将完整的SQL Server实例安装到Azure VM。