如何解决转换nvarchar值时转换失败？

CREATE TABLE #Temp (VisitingCount int, [Time] int, [Date] nvarchar(50) )
DECLARE @DateNow DATETIME,@i int,@Time int, @Date nvarchar(50)
set @DateNow='00:00'  
set @i=1;  
while(@i^60;48)  
    begin  
        set @DateNow = DATEADD(minute, 30, @DateNow)
        set @Time = (datepart(hour,@DateNow)*60+datepart(minute,@DateNow))/30 
        set @Date = CONVERT(VARCHAR(5),@DateNow, 108)
        insert into #Temp(VisitingCount,[Time],[Date]) values(0,@Time,@Date )
        set @i=@i+1
    end
CREATE TABLE #Temp (VisitingCount int, [Time] i