[RESOLVED] Deleting all but a certain part of TextBox.Text

I've done numerous searches, but can't find exactly what I'm looking for. I have a TextBox1 that contains a String in the format:

Code:

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repairhelp&poster=1015857078&time=1283836408&bay=230059&src=wp_repairhelp&gs=wp_repairhelp&ref=nf

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The numbers are random - I am trying to remove all the text except for:

Code:

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poster=1015857078

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[ Which is always a random number ] - I need to have the TextBox1.Text = Just the number after poster= - How difficult is this to achieve?

You need a TextBox txtSomeTextBox and a button btnRemoveTextPartRegex on your form

VB.Net Code:

Private Sub btnRemoveTextPartRegex_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRemoveTextPartRegex.Click
 
        'Option A RESULT:  poster=1015857078
        Dim srgx As New System.Text.RegularExpressions.Regex(".*&(poster=\d*)&.*")               'regex with 1 capture group: (.*)
        'Option B RESULT:  1015857078
        'Dim srgx As New System.Text.RegularExpressions.Regex(".*&poster=(\d*)&.*")               'regex with 1 capture group: (.*)
 
        Dim tmpstring As String = txtSomeTextBox.Text                                            'text you need to parse
        Dim matchG As System.Text.RegularExpressions.MatchCollection = srgx.Matches(tmpstring)   'extract it
        txtSomeTextBox.Text = matchG(0).Groups(1).ToString()
End Sub

Assuming some parts of the text are static, you can edit this slightly to your needs (make sure you only get indexes of parts of the string that will remain constant). There are probably better ways of doing this but if you want an alternative to regex, here you go:

vb Code:

Private Function SplitThis(ByVal WhatToSplit As String, ByVal between1 As String, ByVal between2 As String)
        Dim str As String = ""
        Dim index1 As Integer = WhatToSplit.IndexOf(between1)
        Dim index2 As Integer = WhatToSplit.IndexOf(between2)
 
        str = WhatToSplit.Substring(index1, index2 - index1)
 
        Return str
    End Function
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        MsgBox(SplitThis(TextBox1.Text, "poster=", "&time"))
    End Sub

In this case you're reading between two points, you're instructing it to start reading at the first index of "poster=" and stop as soon as it reaches the first index of "&time" in this case it will get

Code:

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poster=1015857078

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Oh yeah, textbox1.text just contained

Code:

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repairhelp&poster=1015857078&time=1283836408&bay=230059&src=wp_repairhelp&gs=wp_repairhelp&ref=nf

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Hope that helps you a bit.

Zeljko, that worked perfectly - Thank you!

np, glad to help, thanks ;)