CRUD Write data logic – Fyne Golang GUI Tutorial 58
CRUD Write data logic – Fyne Golang GUI Tutorial 58
package main
// import fyne
import (
"encoding/json"
"io/ioutil"
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/app"
"fyne.io/fyne/v2/container"
"fyne.io/fyne/v2/widget"
)
func main() {
// student struct, you can use any name
type Student struct {
Name string // name N is capital
Phone string
}
// Now creat a slice/ array to store data
var myStudentData []Student
// new app
a := app.New()
// new title and window
w := a.NewWindow("CRUD APP")
// resize window
w.Resize(fyne.NewSize(400, 400))
// entry widget for name
e_name := widget.NewEntry()
e_name.SetPlaceHolder("Enter name here...")
// entry widget for phone
e_phone := widget.NewEntry()
e_phone.SetPlaceHolder("Enter phone here...")
// submit button
submit_btn := widget.NewButton("Submit", func() {
// logic part- store our data in json format
// let create a struct for our data
// Get data from entry widget and push to slice
myData1 := &Student{
Name: e_name.Text, // data from name entry widget
Phone: e_phone.Text,
}
// append / push data to our slice
myStudentData = append(myStudentData, *myData1) // * star is very important
// convert / parse data to json format
// 3 arguments
// 1st is our slice data
// ignore 2nd
// 3rd is identation, we are using space to indent our data
final_data, _ := json.MarshalIndent(myStudentData, "", " ")
// writing data to file
// it take 3 things
//file name .txt or .json or anything you want to use
// data source, final_data in our case
// writing/reading/execute permission
ioutil.WriteFile("myFile_name.txt", final_data, 0644)
/// we are done :)
// lets test
// empty input field after data insertion
e_name.Text = ""
e_phone.Text = ""
// refresh name & phone entry object
e_name.Refresh()
e_phone.Refresh()
})
// show and run
w.SetContent(
// vbox container
container.NewVBox(e_name, e_phone, submit_btn),
)
w.ShowAndRun()
}
