SSRS嵌套的IIF / CStr说明

Question

Could someone let me know if the IIF statement below means output any value that starts with a 4 please?

=IIF(LEFT(CStr(Fields!CLOCK_NUMBER.Value),1)="4",Fields!JOB_NO.Value, "")

Answer 1

The short answer is yes.

Starting from the middle and working outwards this expression is doing the following..

1. Get the value of the field CLOCK_NUMBER
2. Convert this to a string (the CSTR function)
3. Take the 1st character (LEFT function with 1 as the seconds parameter)
4. If the equals "4" return the Value that is in JOB_NO
5. Otherwise return an empty string

If this is not working for some reason, try converting the job_no to a string before returning, that way you ensure you always return a string (in case JOB_NO is numeric). You can simply wrap the job_no in a CSTR like this CSTR(Fields!JOB_NO.Value)

Answer 2

Translates to..."try to" convert the field CLOCK_NUMBERS's native value to a string and take the LEFT(1) most significant digit(s) and if that value is "4" then return the JOB_NO Fields's value. else return empty string.

So, it is, if the first digit is 4 then return JOB_NO .