Hi there!
I wish that someone helps me in the next code :
A- Before adding a new data, I want to check if the (elev_no) or the (id) exists before , if it already exists in the xml database then message (the student or the id exists) , if not then add the new data.
B- Before updating the existed data, if the user tries to change or modify the (elev_no) or the (id) which is already exist in the xml database then message (the student or the id exists) , if not then update the data.
I wish that someone helps me in the next code :
A- Before adding a new data, I want to check if the (elev_no) or the (id) exists before , if it already exists in the xml database then message (the student or the id exists) , if not then add the new data.
B- Before updating the existed data, if the user tries to change or modify the (elev_no) or the (id) which is already exist in the xml database then message (the student or the id exists) , if not then update the data.
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