error message "The field can not be an empty string"

hi

in that text box leave function

you give condition

 

if(textbox1.text!=string.empty) 

{

 //code

} 

else

// show message enter the data

ooooooouuuuupssssssssss. i comment the exception and execute it but it make me the same problem

 

 

 

 

 

??????? 

yes i make this code with exception

You are encountering the exception due to following reason:

 

When you are not providing any value to textbox and submitting database, it is checking the column is mandatory in your database. If you don't want to make mandatory then go to table schema and change not null property.