我也是刚刚使用walk这个组件，很多控件接口不熟悉，把我上次发的邮件群发器修改成图形界面的，线程发送邮件，gob库保存数据等。只提供作学习交流，仅供参考（界面很烂）。
接下来是main.go的代码：
// Multi-SendEmail project main.go
package main
import (
"bufio"
"encoding/gob"
"errors"
"fmt"
"io"
"net/smtp"
"os"
"strconv"
"strings"
"time"
)
import (
"github.com/lxn/walk"
. "github.com/lxn/walk/declarative"
)
type ShuJu struct {
Name string
Pwd string
Host string
Subject string
Body string
Send string
}
func SendMail(user, password, host, to, subject, body, mailtype string) error {
fmt.Println("Send to " + to)
//fmt.Println(user, password, host, to, subject, body, mailtype)
hp := strings.Split(host, ":")
auth := smtp.PlainAuth("", user, password, hp[0])
var content_type string
if mailtype == "html" {
content_type = "Content-Type: text/html;charset=UTF-8"
} else {
content_type = "Content-Type: text/plain;charset=UTF-8"
}
body = strings.TrimSpace(body)
msg := []byte("To: " + to + "\r\nFrom: " + user + "<" + user + ">\r\nSubject: " + subject + "\r\n" + content_type + "\r\n\r\n" + body)
send_to := strings.Split(to, ";")
err := smtp.SendMail(host, auth, user, send_to, msg)
if err != nil {
fmt.Println(err.Error())
}
return err
}
func readLine2Array(filename string) ([]string, error) {
result := make([]string, 0)
file, err := os.Open(filename)
if err != nil {
return result, errors.New("Open file failed.")
}
defer file.Close()
bf := bufio.NewReader(file)
for {
line, isPrefix, err1 := bf.ReadLine()
if err1 != nil {
if err1 != io.EOF {
return result, errors.New("ReadLine no finish")
}
break
}
if isPrefix {
return result, errors.New("Line is too long")
}
str := string(line)
result = append(result, str)
}
return result, nil
}
func DelArrayVar(arr []string, str string) []string {
str = strings.TrimSpace(str)
for i, v := range arr {
v = strings.TrimSpace(v)
if v == str {
if i == len(arr) {
return arr[0 : i-1]
}
if i == 0 {
return arr[1:len(arr)]
}
a1 := arr[0:i]
a2 := arr[i+1 : len(arr)]
return append(a1, a2...)
}
}
return arr
}
func LoadData() {
fmt.Println("LoadData")
file, err := os.Open("data.dat")
defer file.Close()
if err != nil {
fmt.Println(err.Error())
SJ.Name = "用户名"
SJ.Pwd = "用户密码"
SJ.Host = "SMTP服务器:端口"
SJ.Subject = "邮件主题"
SJ.Body = "邮件内容"
SJ.Send = "要发送的邮箱，每行一个"
return
}
dec := gob.NewDecoder(file)
err2 := dec.Decode(&SJ)
if err2 != nil {
fmt.Println(err2.Error())
SJ.Name = "用户名"
SJ.Pwd = "用户密码"
SJ.Host = "SMTP服务器:端口"
SJ.Subject = "邮件主题"
SJ.Body = "邮件内容"
SJ.Send = "要发送的邮箱，每行一个"
}
}
func SaveData() {
fmt.Println("SaveData")
file, err := os.Create("data.dat")
defer file.Close()
if err != nil {
fmt.Println(err)
}
enc := gob.NewEncoder(file)
err2 := enc.Encode(SJ)
if err2 != nil {
fmt.Println(err2)
}
}
var SJ ShuJu
var runing bool
var chEnd chan bool
func main() {
LoadData()
chEnd = make(chan bool)
var emails, body, msgbox *walk.TextEdit
var user, password, host, subject *walk.LineEdit
var startBtn *walk.PushButton
MainWindow{
Title: "邮件群发器 By 一曲忧伤",
MinSize: Size{800, 600},
Layout: HBox{},
Children: []Widget{
TextEdit{AssignTo: &emails, Text: SJ.Send, ToolTipText: "待发送邮件列表，每行一个"},
VSplitter{
Children: []Widget{
LineEdit{AssignTo: &user, Text: SJ.Name, CueBanner: "请输入邮箱用户名"},
LineEdit{AssignTo: &password, Text: SJ.Pwd, PasswordMode: true, CueBanner: "请输入邮箱登录密码"},
LineEdit{AssignTo: &host, Text: SJ.Host, CueBanner: "SMTP服务器:端口"},
LineEdit{AssignTo: &subject, Text: SJ.Subject, CueBanner: "请输入邮件主题……"},
TextEdit{AssignTo: &body, Text: SJ.Body, ToolTipText: "请输入邮件内容", ColumnSpan: 2},
TextEdit{AssignTo: &msgbox, ReadOnly: true},
PushButton{
AssignTo: &startBtn,
Text: "开始群发",
OnClicked: func() {
SJ.Name = user.Text()
SJ.Pwd = password.Text()
SJ.Host = host.Text()
SJ.Subject = subject.Text()
SJ.Body = body.Text()
SJ.Send = emails.Text()
SaveData()
if runing == false {
runing = true
startBtn.SetText("停止发送")
go sendThread(msgbox, emails)
} else {
runing = false
startBtn.SetText("开始群发")
}
},
},
},
},
},
}.Run()
}
func sendThread(msgbox, es *walk.TextEdit) {
sendTo := strings.Split(SJ.Send, "\r\n")
susscess := 0
count := len(sendTo)
for index, to := range sendTo {
if runing == false {
break
}
msgbox.SetText("发送到" + to + "..." + strconv.Itoa((index/count)*100) + "%")
err := SendMail(SJ.Name, SJ.Pwd, SJ.Host, to, SJ.Subject, SJ.Body, "html")
if err != nil {
msgbox.AppendText("\r\n失败:" + err.Error() + "\r\n")
if err.Error() == "550 Mailbox not found or access denied" {
SJ.Send = strings.Join(DelArrayVar(strings.Split(SJ.Send, "\r\n"), to), "\r\n")
es.SetText(SJ.Send)
}
time.Sleep(1 * time.Second)
continue
} else {
susscess++
msgbox.AppendText("\r\n发送成功!")
SJ.Send = strings.Join(DelArrayVar(strings.Split(SJ.Send, "\r\n"), to), "\r\n")
es.SetText(SJ.Send)
}
time.Sleep(1 * time.Second)
}
SaveData()
msgbox.AppendText("停止发送!成功 " + strconv.Itoa(susscess) + " 条\r\n")
}
然后是walk程序所用的main.manifest，完全照抄官方的，还没研究其中意思：
<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0"> <assemblyIdentity version="1.0.0.0" processorArchitecture="*" name="SomeFunkyNameHere" type="win32"/> <dependency> <dependentAssembly> <assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls" version="6.0.0.0" processorArchitecture="*" publicKeyToken="6595b64144ccf1df" language="*"/> </dependentAssembly> </dependency> </assembly>
通过这个main.manifest执行（如果walk安装好了，应该就有这个命令）：
rsrc -manifest main.manifest -o rsrc.syso
上图是rsrc命令的参数列表，比如我为自已的程序加个ico图标：
rsrc -manifest main.manifest –ico icon.ico -o rsrc.syso
总结：只要熟悉这些非常强大的第三方库，Go应该也可以做出非常不错的图形应用程序，对于接触C、C++过晚的朋友来说非常合适。
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