我希望降低Qpixmap裁剪的分辨率，然后保存一个png
self.view.alpha = 0.2答案 0 :(得分：1)
尝试在调用DECLARE @ID1 int
DECLARE @ID2 int
-- This works
INSERT INTO table1 (field1,field2)
VALUES('test', 1)
SELECT @ID1 = SCOPE_IDENTITY() -- This picks up the correct ID
-- This sometimes doesn't seem to run
IF @@error <> 0
BEGIN
PRINT 'Error before: ' + (cast @@error as varchar)
END
BEGIN TRY
INSERT INTO table2 (field1, field2, field3, field4, field5)
VALUES(1,2,3,4,@ID1)
END TRY
BEGIN CATCH
SELECT ERROR_NUMBER() AS ErrorNumber
,ERROR_SEVERITY() AS ErrorSeverity
,ERROR_STATE() AS ErrorState
,ERROR_PROCEDURE() AS ErrorProcedure
,ERROR_LINE() AS ErrorLine
,ERROR_MESSAGE() AS ErrorMessage;
END CATCH
IF @@error <> 0
BEGIN
PRINT 'Error after: ' + cast(@@error as varchar)
END
-- This always runs, but if the previous insert doesn't run inserts the previous ID into @ID2
SELECT @ID2 = SCOPE_IDENTITY()
-- Inserts the ID from the previous step and therefore is sometimes wrong
INSERT INTO table3 (field1,field2)
VALUES ('testing', @ID2)
quality参数