基于其他参数值的SSRS参数值无法通过LEFT使用

Question

I have an issue with SSRS parameters. I have a parameter that is based on a dataset value. This parameter is called UserOffice and correctly returns value GB10. I have a second parameter called IncludePrimary that returns the value of UserOffice (=Parameters!UserOffice.Value):

I then change the value of the IncludePrimary expression to be the first 2 characters of UserOffice (=Left(Parameters!UserOffice.Value, 2)):

I expected the field to show GB. Can someone please tell me what I am doing wrong?

Thanks Rob

Answer 1

A parameter (your second one) isn't "updated" (the default value isn't re-applied) while the currently selected value(s) is (are) still in the list of available values after other parameters have been changed.

To update the second parameter, you must not only change its Default Value but will need to set its Available Values as well:

Or, of course, you can simply use your expression Left(Parameters!UserOffice.Value, 2) whenever you need it, so you don't need that second parameter at all.

Answer 2

Thanks to everyone who replied. They responses were very helpful. In order to resolve my issue I created a second dataset that calculated the default value (Y or N). I used set Available Values and then used my new dataset to set the default.

It works a treat.

Rob