How to use Delphi realize captcha validation login function

CodePudding user response:

1, set up a table, save the user login information, fields the user name, password, permission to 1, permissions 2...
2, when a user logs in, read in the user name, password, and the user name in the table, whether the password comparison corresponding;
3, the user name, password corresponding correct, read the corresponding permissions,

CodePudding user response:

Get a random number to label or not just a matter of yao in the edit

CodePudding user response:

You will get better, you draw a diagram also pretty simple

CodePudding user response:

1, set up a number of data (0001-9999) images (with interference stripes);
2, is in the login screen, random graph (access), display images;
3, the user input validation, can through consistent, otherwise the prompt reentry, more than N, step,