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POGetting the Request Variables from an ASP.NET page
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copied!<p>I wrote the following function that works about 95% of the time, but I need it to work 100% (obviously):</p> <pre><code>Public Shared Function getPassedVars() As String Const keyCount As Integer = 54 ' 54 seems to be the number of parameter keys passed by default (for this web_app). ' there are more if there is a form involved (ie. from search page) Dim oParams As String = "" Try With HttpContext.Current If .Request.Params.AllKeys.Count > keyCount Then For i As Integer = 0 To (.Request.Params.AllKeys.Count - (keyCount + 1)) oParams &= String.Format("{0}={1}{2}", .Request.Params.Keys.Item(i), .Request.Params(i), IIf(i < .Request.Params.AllKeys.Count - (keyCount + 1), ";", "")) Next End If End With Return oParams Catch ex As Exception Return Nothing End Try End Function </code></pre> <p>It scrubs the <code>Request.Params</code> object for passed variables, which are in the beginning of the array (the remaining ones are ASP parameters). I am pretty sure I've seen a different way to get these parameters, but I haven't been able to figure it out. Any suggestions?</p> <h2>EDIT</h2> <p>So it looks like I can use the <code>Request.URL.Query</code> to achieve this, I will investigate this and post back. </p> <p>Here is what I came up with:</p> <pre><code>Public Shared Function getPassedVars() As String Dim oParams As String = "" Dim qString As String = "" Dim oSplit As New List(Of String) Try With HttpContext.Current qString = .Request.Url.Query If qString.Length > 0 Then 'do we have any passed variables? If qString.StartsWith("?") Then qString = qString.Remove(0, 1) 'remove leading ? from querystring if it is there oSplit.AddRange(qString.Split("&")) For i As Integer = 0 To oSplit.Count - 1 oParams &= String.Format("{0}{1}", oSplit.Item(i), IIf(i < oSplit.Count - 1, ";", "")) Next Return oParams Else Return Nothing End If End With Catch ex As Exception Return Nothing End Try End Function </code></pre> <p>So far so good.</p>

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