我正在使用VB.Net将多个文本文件合并为一个。它正确合并文本文件,但文本文件顶部出现空白行,这意味着我无法正确读取文本文件。任何关于如何删除此空白行的想法将不胜感激。这是我们的代码。
Dim lines As String() = File.ReadAllLines("7UP.txt")
Dim firstLine As String = lines.First
Dim lastLine As String = lines.Last
Using addProducts = File.AppendText("Top5.txt")
addProducts.WriteLine(lines.First)
addProducts.WriteLine(lines.Last)
End Using
lines = File.ReadAllLines("Americano.txt")
Using addProducts = File.AppendText("Top5.txt")
addProducts.WriteLine(lines.First)
addProducts.WriteLine(lines.Last)
End Using
lines = File.ReadAllLines("AppleJuice.txt")
Using addProducts = File.AppendText("Top5.txt")
addProducts.WriteLine(lines.First)
addProducts.WriteLine(lines.Last)
End Using
答案 0 :(得分:1)
这将只为您提供包含数据的行:
Dim lines As String() =
File.ReadAllLines("7UP.txt").
Where(Function(x) x.Trim <> String.Empty).
ToArray()
您可能希望开始像这样组织代码,以使其更易于管理:
Private Sub PerformMerge()
Const top5File As String = "Top5.txt"
MergeData(GetLinesWithData("7UP.txt"), top5File)
MergeData(GetLinesWithData("Americano.txt"), top5File)
MergeData(GetLinesWithData("AppleJuice.txt"), top5File)
End Sub
Private Function GetLinesWithData(sourceFile As String) As String()
Return File.ReadAllLines(sourceFile).
Where(Function(x) x.Trim <> String.Empty).
ToArray()
End Function
Private Sub MergeData(lines As String(), destinationFile As String)
Using addProducts = File.AppendText(destinationFile)
addProducts.WriteLine(lines.First)
addProducts.WriteLine(lines.Last)
End Using
End Sub