Solved Nz(string,ifnull(my string))

[Reshmi mohankumar]

Me.simg.Picture = Nz(CurrentProject.Path & StudentPhoto, CurrentProject.Path & "\StudentImages\INDEX.JPG")
Me.fimg.Picture = Nz(CurrentProject.Path & FatherPhoto, CurrentProject.Path & "\StudentImages\INDEX.JPG")

But this code is under forms onCurrent event
if there is a no string i got error like '2220' can't open the file "F:\SmartSchool".

 

[theDBguy]

Hi. Where did "F:\SmartSchool" come from?

 

[Isaac]

You might need to use something along the lines of Dir() or a Filesystemobject rather than NZ. NZ is to test database record columns for Null.

 

[Reshmi mohankumar]

Hi. Where did "F:\SmartSchool" come from?

i hope i used currentproject.path used in value if null place so.
my db had only path string if which are having paths they can visible , but which are not having path i got error like above.

 

[plog]

NZ has 2 arguments:

1. The thing you are testing (CurrentProject.Path & StudentPhoto)
2. What to use when that first thing is NULL ( CurrentProject.Path & "\StudentImages\INDEX.JPG")

For #1 to be truly NULL both parts must be NULL. If CurrentProject.Path has a value but StudentPhot doesn't, it evaluates to true and the second part isn't used. Most likely Part 1 should only test StudentPhoto and CurrentProject.Path should not be anywhere in the NZ:

=CurrentProject.Path & NZ(StudentPhoto, "\StudentImages\INDEX.JPG" )

 

[Reshmi mohankumar]

You might need to use something along the lines of Dir() or a Filesystemobject rather than NZ. NZ is to test database record columns for Null.

I dont know how to use them....Is simple inline code??

 

[Reshmi mohankumar]

NZ has 2 arguments:

1. The thing you are testing (CurrentProject.Path & StudentPhoto)
2. What to use when that first thing is NULL ( CurrentProject.Path & "\StudentImages\INDEX.JPG")

For #1 to be truly NULL both parts must be NULL. If CurrentProject.Path has a value but StudentPhot doesn't, it evaluates to true and the second part isn't used. Most likely Part 1 should only test StudentPhoto and CurrentProject.Path should not be anywhere in the NZ:

=CurrentProject.Path & NZ(StudentPhoto, "\StudentImages\INDEX.JPG" )

it worked...And i learnt good point
i need to have strong skills ....You took me cafe to refresh...Thank you sir

 

[Isaac]

I dont know how to use them....Is simple inline code??

Well, your original post didn't actually explain what your goal is. I had to interpret it from looking at your code, which makes it look like you are testing for the existence of files by using NZ--which won't work.
If plog is right, and you're actually just wanting to run a logic like this:
If a certain Form control's value is Null, then display CurrentProject.Path & "\StudentImages\INDEX.JPG
...Then I would recommend his suggestion.

If, in contrast, you actually want to check for the existence of a windows file (does it exist or not?), then you want to look into using Dir() or FSO

 

[Reshmi mohankumar]

Well, your original post didn't actually explain what your goal is. I had to interpret it from looking at your code, which makes it look like you are testing for the existence of files by using NZ--which won't work.
If plog is right, and you're actually just wanting to run a logic like this:
If a certain Form control's value is Null, then display CurrentProject.Path & "\StudentImages\INDEX.JPG
...Then I would recommend his suggestion.

If, in contrast, you actually want to check for the existence of a windows file (does it exist or not?), then you want to look into using Dir() or FSO

finally im good. thank you bro