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  • vb.net 教程 4-11 Json文件操作 2 JavaScriptSerializer

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使用JavaScriptSerializer生成和解析json：
 
设计界面：
 
 
 
其中button1和button3是生成，button2和button4是解析。
 
项目目标框架选择.net Framework 4.5，添加对system.web.extensions的引用，同时代码中添加：
 
Imports System.Web.Script.Serialization
当button1按下时，生成json格式的字符串：
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim newbooks As New Books
 
        Dim newBook As New BookStore
        Dim newSingleBook As New Book
        newSingleBook.Title = "这是测试"
        newSingleBook.Author = "作者"
        newSingleBook.Country = "中国"
        newSingleBook.Price = 10.2
        newSingleBook.Year = "1985"
        newBook.book = newSingleBook
        newbooks.bookstore = newBook
 
        Dim serializer As New JavaScriptSerializer
 
        Dim strNewBook As String
        strNewBook = serializer.Serialize(newbooks)
        TextBox1.Text = strNewBook
 
    End Sub
当button2按下时将json字符串解析为类：
 
   Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim serializer As New JavaScriptSerializer
        Dim strNewBook As String = TextBox1.Text
 
        Dim newBooks As New Books
        newBooks = serializer.Deserialize(Of Books)(strNewBook)
 
        TextBox2.Text &= "---------------" & ControlChars.CrLf
        TextBox2.Text &= "Title：" & newBooks.bookstore.book.Title & ControlChars.CrLf
        TextBox2.Text &= "Author：" & newBooks.bookstore.book.Author & ControlChars.CrLf
        TextBox2.Text &= "Country：" & newBooks.bookstore.book.Country & ControlChars.CrLf
        TextBox2.Text &= "Price：" & newBooks.bookstore.book.Price & ControlChars.CrLf
        TextBox2.Text &= "Year：" & newBooks.bookstore.book.Year & ControlChars.CrLf
    End Sub
生成和解析结果：
 
 
在对json字符串进行解析时，设置的类的属性名称请务必与json代码中的键名称相同。
 
button3生成：
 
    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        Dim newBooks As New Books1
        ReDim newBooks.bookstore(2)
 
        Dim newSingleBook As New Book
        newSingleBook.Title = "这是测试"
        newSingleBook.Author = "作者"
        newSingleBook.Country = "中国"
        newSingleBook.Price = 10
        newSingleBook.Year = "1985"
 
        Dim newBook As New BookStore1
        newBook.book = newSingleBook
        newBooks.bookstore(0) = newBook
 
        newSingleBook = New Book
        newSingleBook.Title = "这是测试1"
        newSingleBook.Author = "作者"
        newSingleBook.Country = "中国"
        newSingleBook.Price = 11
        newSingleBook.Year = "1985"
 
        newBook = New BookStore1
        newBook.book = newSingleBook
        newBooks.bookstore(1) = newBook
 
 
        newSingleBook = New Book
        newSingleBook.Title = "这是测试2"
        newSingleBook.Author = "作者"
        newSingleBook.Country = "中国"
        newSingleBook.Price = 12
        newSingleBook.Year = "1985"
 
        newBook = New BookStore1
        newBook.book = newSingleBook
        newBooks.bookstore(2) = newBook
 
        Dim serializer As New JavaScriptSerializer
 
        Dim strNewBook As String
        strNewBook = serializer.Serialize(newBooks)
        TextBox1.Text = strNewBook
    End Sub
button4解析：
 
    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        Dim serializer As New JavaScriptSerializer
        Dim strNewBook As String = TextBox1.Text
 
        Dim newBooks As New Books1
        newBooks = serializer.Deserialize(Of Books1)(strNewBook)
 
        For i As Integer = 0 To newBooks.bookstore.Length - 1
            TextBox2.Text &= "---------------" & ControlChars.CrLf
            TextBox2.Text &= "Title：" & newBooks.bookstore(i).book.Title & ControlChars.CrLf
            TextBox2.Text &= "Author：" & newBooks.bookstore(i).book.Author & ControlChars.CrLf
            TextBox2.Text &= "Country：" & newBooks.bookstore(i).book.Country & ControlChars.CrLf
            TextBox2.Text &= "Price：" & newBooks.bookstore(i).book.Price & ControlChars.CrLf
            TextBox2.Text &= "Year：" & newBooks.bookstore(i).book.Year & ControlChars.CrLf
        Next
    End Sub
 
生成和解析结果：
 
 
 
 
 
 
 
 
 
 
由于.net平台下C#和vb.NET很相似，本文也可以为C#爱好者提供参考。
 
学习更多vb.net知识，请参看vb.net 教程 目录
 
 
 
 
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版权声明：本文为CSDN博主「VB.Net」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/uruseibest/article/details/79243658

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