如何读取和写入多个二进制值 [英] How to Read and Write multiple Binary values

问题描述

我有一个程序，其中用户在文本框中输入数据，然后单击保存"，该程序将其以二进制格式保存在文件中.这是它的代码:

I have a program in which the data is entered by the user in text-boxes and then on clicking save the program saves it in a binary format in a file. Here is the code for it :

Public Sub BinaryExport()
       Dim export As FileStream
       Try
           export = New FileStream(Application.StartupPath + "\read.dat", FileMode.Create)
       Catch e As Exception
           MsgBox(e.Message)
       End Try

       Dim binExport As BinaryWriter = New BinaryWriter(export)

       Try
           binExport.Write(TextBox1.Text)
           binExport.Write(TextBox2.Text)
           binExport.Write(TextBox3.Text)
           binExport.Close()
           MsgBox("Saved SuccessFully")
       Catch e1 As Exception
           MsgBox(e1.Message)
       End Try

   End Sub

如何存储多个数据输入并使用vb.net读取它们

我使用以下代码进行阅读，但失败了

How do I store multiple data inputs and read them using vb.net

I used the following code for reading but failed

Public Sub BinaryImport()
        Dim import As FileStream
        Try
            import = New FileStream(Application.StartupPath + "\read.dat", FileMode.Open)
        Catch e2 As Exception
            MsgBox("File NOT FOUND")
        End Try

        Dim BinaryReader As BinaryReader = New BinaryReader(import)

        Try
            TextBox1.Text = BinaryReader.ReadString
            TextBox2.Text = BinaryReader.ReadString
            TextBox3.Text = BinaryReader.ReadString
            BinaryReader.Close()
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try

    End Sub

请帮忙！

Please Help!

推荐答案

要将更多数据添加到文件中，您应该更改以下行:

To add more data to your file you should change this line:

export = New FileStream(Application.StartupPath + "\read.dat", FileMode.Create)

至:

to:

export = New FileStream(Application.StartupPath + "\read.dat", FileMode.Append)

如果文件不存在，则会创建该文件，否则将其打开，并将写指针定位在末尾，以准备添加新数据.

希望这会有所帮助.

This will create the file if it does not exist, otherwise it opens it and positions the write pointer at the end ready to add new data.

Hope this helps.

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