How can I filter a TXT file using VB.NET?

Question

I have a txt file that displays the following information returned by AutoCAD:

; IAcadToolbar: An AutoCAD toolbar

; Property values:

;   Application (RO) = #<VLA-OBJECT IAcadApplication 00d591b4>

;   Count (RO) = 19

;   DockStatus (RO) = 4

;   FloatingRows = 5

;   Height (RO) = AutoCAD: The toolbar is invisible. Please make it visible

;   HelpString = "Draw Toolbar\n    "

;   LargeButtons (RO) = 0

;   left = 1310

;   Name = "Draw"

;   Parent (RO) = #<VLA-OBJECT IAcadToolbars 224a6b04>

;   TagString (RO) = "ID_TbDraw"

;   top = 646

;   Visible = 0

;   Width (RO) = AutoCAD: The toolbar is invisible. Please make it visible

; Methods supported:

;   AddSeparator (1)

;   AddToolbarButton (5)

;   Delete ()

;   Dock (1)

;   Float (3)

;   Item (1)

Problem being is that I need to filter it so I am only left with:

;   DockStatus (RO) = 4

;   left = 1310

;   Name = "Draw"

;   top = 646

;   Visible = 0

They must also remain in the same order:

; DockStatus (RO) = 4 ; DockStatus (RO) = 4 always on top followed by ; left = 1310 ; left = 1310 and so on, all other information may be discarded.

Dose anybody know how to do this in VB.NET?

Answer 1

Imports System.IO
Imports System.Text

Dim output = New StringBuilder()

' Read the lines from FileName into an array of strings. '
Dim input = File.ReadAllLines(FileName)

For Each line in input

    If line.StartsWith(";   DockStatus (RO) = ") OrElse
       line.StartsWith(";   left = ") OrElse
       line.StartsWith(";   Name = ") OrElse
       line.StartsWith(";   top = ") OrElse
       line.StartsWith(";   Visible = ") Then

       output.AppendLine(line)

    End If

Next

Answer 2

Ok, assuming that you've got a file that you're reading line by line, can't you simply do something like this? (pseudo code only)

string result;
foreach line in linesFromFile
{
    if(line.StartsWith("; DockStatus") or 
       line.StartsWith("; Name = "))
    {
        result += line;
    }
}

What I've presented is not pretty, but might get you started.

Answer 3

我建议将所有值都放在字符串中，然后使用分割器，然后过滤掉所需的值，并对它们进行排序，以便在需要时将它们转换为所需的输出格式