vb.net查看文件大小 vbnet recordset

请教如何在vb.net下获取指定文件夹大小

CSV文件特征是每行一条记录,字段用逗号分开。你只需要逐行处理,将每行文本用逗号切分得到数组array,然后判断array[0]是否等于"bbb",如果相等则array[1]就是”4561234567890“;如果不等则继续处理下一行。

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vbnet 如何获取文件大小

你实例化一个文件对象,就可以获取这个文件的相关属性了,VB.NET实例,以你的文件为例:

Dim sourcefileinfo As New FileInfo(“ c:\1.txt”) '定义并实例化FileInfo对象。length就是它的大小!

label1.Text = "文件大小为: " sourcefileinfo.Length "字节"

vb.net中,不使用FSO方法,怎么快速的得到文件夹的大小?

窗体上添加一个按钮,代码如下:

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Button1.Text = "稍等!"

Button1.Enabled = False

Dim MyFolder As String = "C:\Windows"

Dim MyDir As New System.IO.DirectoryInfo(MyFolder)

Dim MyInfo As String = MyFolder + "文件夹的大小是:" + CalculateDirectorySize(MyDir, True).ToString() + "字节。"

MessageBox.Show(MyInfo, "信息提示", _

MessageBoxButtons.OK, MessageBoxIcon.Information)

Button1.Text = "开始"

Button1.Enabled = True

End Sub

Public Shared Function CalculateDirectorySize(ByVal MyDirectory As System.IO.DirectoryInfo, ByVal IsSubDirectories As Boolean) As Long

Dim MySize As Long = 0

'检查包含的所有文件

Dim MyFiles() As System.IO.FileInfo = MyDirectory.GetFiles()

For Each MyFile As System.IO.FileInfo In MyFiles

MySize += MyFile.Length

Next

'检查包含的所有子文件夹

If (IsSubDirectories) Then

Dim MyDirs() As System.IO.DirectoryInfo = MyDirectory.GetDirectories()

For Each MyDir As System.IO.DirectoryInfo In MyDirs

MySize += CalculateDirectorySize(MyDir, True)

Next

End If

Return MySize

End Function

End Class


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