please i need help ... i'm stuck with my project

Question

hello everybody ...

 

               i need some help with my project 

 

 some explain about my project

 

I'm  trying to Create a Windows Form project it's something like images archive ... for every person ..

 

all u need to do  just make an ID for your self and type your name then u will have 45 slot to store 45 image ...

 

and  maybe you put less than 45 this day and u can put more any other time 

 

the things I'm stuck in 

 

i don't know how to leave the pics null when u add a new user ...

 

and if i made a default image then i Replace it in the update section when i need this slot ... this default always replace my stored images when i try to upload other pics ...

 

sorry my english is too bad i'm egyptian .... i need some help please anyone tell me how can i store images without using geting " empty path name is not legal " when i leave the image path null

 

 

 any ideas ????