Python WSGI缺少请求头'If-None-Matches'(Python WSGI missing request header 'If-None-Matches')

 你可以把它放在括号中： 
 
SELECT TOP (@TopValue) * FROM dbo.PositionData WHERE ID_Tracker=@ID_Tracker
 
 这是有效的，并为表适配器的SqlCommand正确生成一个int参数。 
 
 
 根据您的注释，如果可以在强类型DataSet参数化ORDER BY的排序方向。 对的，这是可能的： 
 
SELECT TOP @TopValue * FROM dbo.PositionData WHERE ID_Tracker=@ID_Tracker
ORDER BY 
    CASE WHEN @OrderDirection = 'ASC'  THEN [Time] END ASC, 
    CASE WHEN @OrderDirection = 'DESC' THEN [Time] END DESC
 
 但是您必须手动将参数添加到命令集中，因为Visual Studio不需要。 因此 
 
 
 
 右键单击命令和 
 
 
 单击properties 
 
 
 点击parameters （截图底部） 
 
 
 像这里添加@OrderDirection参数： 
 
 
 但也许您应该使用两种不同的方法或存储过程。 

You can put it in brackets:
 
SELECT TOP (@TopValue) * FROM dbo.PositionData WHERE ID_Tracker=@ID_Tracker
 
That's valid and generates correctly an int parameter for the table-adapter's SqlCommand.
 
 
According to your comment if its possible to to parametrize the sort-direction of an ORDER BY in a strongly typed DataSet. Yes, it is possible:
 
SELECT TOP @TopValue * FROM dbo.PositionData WHERE ID_Tracker=@ID_Tracker
ORDER BY 
    CASE WHEN @OrderDirection = 'ASC'  THEN [Time] END ASC, 
    CASE WHEN @OrderDirection = 'DESC' THEN [Time] END DESC
 
But you have to add the parameter to the command-collection manually since visual studio doesn't want. Therefore 
 
 
 
right-click on the command and
 
 
click properties
 
 
click parameters (at the bottom of the screenshot)
 
 
add the @OrderDirection parameter like here:
 
 
But maybe you should either use two different methods or a stored-procedure instead.