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Jul 17th, 2008

Delete From String array

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I know How to Delete a Textfile , I even know how to write the temp string data into a TextFile. But i do noy know how to delete from String array,into which i read all the data of the file. Mine Code is as under,Plz help me out. I will ber very thankful to U.

VB.NET Syntax (Toggle Plain Text)
 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim RowNum As ListViewItem
 
        For Each RowNum In ListView2.SelectedItems
            ListView2.Items.Remove(RowNum)
        Next
 
 
        Dim arrlines() As String = IO.File.ReadAllLines("c:\Records.txt")
 
End sub
 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim RowNum As ListViewItem

        For Each RowNum In ListView2.SelectedItems
            ListView2.Items.Remove(RowNum)
        Next


        Dim arrlines() As String = IO.File.ReadAllLines("c:\Records.txt")

End sub

Last edited by Tekmaven; Jul 18th, 2008 at 6:28 am. Reason: Code tags

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ruchika beddy

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Jul 17th, 2008

Re: Delete From String array

If you only want to delete some records from the file, consider loading them into your ListView, removing the listview items you don't need, then write the listview data back to the file...

Hope this helps

KillerOfDN

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Jul 19th, 2008

Re: Delete From String array

Did you find the solution? If so can you please close this thread by marking it as Solved. And please leave a post with your fix as this will help other forum users.

KillerOfDN

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Jul 20th, 2008

Re: Delete From String array

I do not delete from String Array,To do wat i wanted....I use the another method..I still do not know how to delete from string array.

ruchika beddy

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Jul 20th, 2008

Re: Delete From String array

Might you try utilizing the mid left and right functions? Hope this helps,
Bill P.

Bill Purkins

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Jul 21st, 2008

Re: Delete From String array

Hi,

I see you have the contents of the text file in the array arrlines.
Then, guess that you have the value you want to delete in the valueToDel variable:

VB Syntax (Toggle Plain Text)
        ...
        Dim c As Integer = 0
        Dim valueToDelete As String = "some string"
        Dim arrLinesTemp() As String
        Dim arrLines() As String = IO.File.ReadAllLines("c:\Records.txt")
 
        ' Make a copy of the original array avoiding the value
        ' you want to delete
        For x As Integer = 0 To UBound(arrLines)
            If arrLines(x) <> valueToDelete Then
                arrLinesTemp(c) = arrLines(x)
                c += 1
            End If
        Next x
 
        ' Clear the original array
        Array.Clear(arrLines, 0, UBound(arrLines))
 
        ' Restore the values left in the original array
        Array.Copy(arrLinesTemp, arrLines, UBound(arrLinesTemp))
        ...
        ...
        Dim c As Integer = 0
        Dim valueToDelete As String = "some string"
        Dim arrLinesTemp() As String
        Dim arrLines() As String = IO.File.ReadAllLines("c:\Records.txt")

        ' Make a copy of the original array avoiding the value
        ' you want to delete
        For x As Integer = 0 To UBound(arrLines)
            If arrLines(x) <> valueToDelete Then
                arrLinesTemp(c) = arrLines(x)
                c += 1
            End If
        Next x

        ' Clear the original array
        Array.Clear(arrLines, 0, UBound(arrLines))

        ' Restore the values left in the original array
        Array.Copy(arrLinesTemp, arrLines, UBound(arrLinesTemp))
        ...

I am sure that there are better ways to do this. But it just works!

Last edited by dmf1978; Jul 21st, 2008 at 12:22 am.

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Jul 24th, 2008

Re: Delete From String array

Hi,
Is your problem solved?

dmf1978

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This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.

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