SSRS 2008中的日期过滤器

Question

I am working with SSRS 2008. I have a table in my report consisting a date/Time Column (DOB). I have a date/time parameter (MyDate) as well. I am trying to set a Filter on my data set like

FormatDateTime(Fields!DOB.Value,2)<=FormatDateTime(Parameters!MyDate.Value,2)

It doesn't filter my table correctly. But if I remove FormatDateTime function then it works fine. i want to understand whats the problem here.

Answer 1

FormatDateTime will return a string, so you're not comparing dates anymore but rather their string representations.

Comparing the dates 02-Feb-2012 and 10-Oct-2012 will give different results than comparing the strings 2/2/2012 and 10/10/2012 .

As mentioned in the comment, it looks like you're just trying to remove the time portion from dates?

Something like this should work, ie converting the strings back to dates.

CDate(FormatDateTime(Fields!DOB.Value,2)) <= CDate(FormatDateTime(Parameters!MyDate.Value,2))

But this is just one suggestion, there are any number of ways of doing this.