LED service summary, led Summary

LED service summary, led Summary

 

Summary of simple programs

A simple small program used to control the LED screen.

LED Service Development Summary system running system function description: 1. ServerStrack service, which provides front-end access. 2. Dynamic library call for information forwarding. 3. Call the rest service to update Background Data. 4. Database technology for data maintenance. Details 1. Use the DLLimPort class to call an unmanaged dll file in C # Of the C ++ dynamic library. When there are multiple entries in the dll, You Need To pair the entry name. Then a constructor using the extern keyword is used to process data. 2. Use of the Form Control dataGridView 1. Bind the Access data source to the code. Because the first column is the primary key ID column when the list is displayed, you need to hide it: bind the data in the Access Table column to the combox drop-down list: 3. Obtain a file in the DEBUG directory where the program runs. 4. C # obtain the system font, set font styles 5. Use object variables 1. Create object classes. 2. instantiate the instance. 3. assign values. 4. Create a list <model> object and add the object. 5. Operate the list object. 6. The time format in C # Must be in the C language. 7. About the use of C # unmanaged data 8. C # obtain and display a piece of data in Access. 9. C # DataGridView control, click a row of data to bind to textBox. 10. The DataGridView deletes the selected row in the database. 11. determines whether the textBox in a panel is empty. 12. The rest service is updated. 13. Accessories: Access Database Help class: