Re: GetSavedLicenseKey and SetSavedLicenseKey and differeing versions.

From: Brian Roder [MSFT] (broder_at_online.microsoft.com)
Date: 09/24/04

  • Next message: johndoe_at_driver.net: "Re: GetSavedLicenseKey and SetSavedLicenseKey and differeing versions." 
    Date: Fri, 24 Sep 2004 22:16:10 GMT

    I am researching other possible solutions but I have one that I verified
    will work. When you call SetSavedLicenseKey/GetSavedLicenseKey/IsKeyValid
    you need to pass the type of the component that is licensed. This is
    passed into the GetLicense when it is called by the Framework. Instead of
    just passing to these 3 methods what is passed in by the Framework you can
    instead pass its base type using type.BaseType. For example, here is
    snippet of GetLicense code using type.BaseType:

    'BEGIN CODE
     Dim lic As RegLicense = Nothing
        Dim key As String

        If context.UsageMode = LicenseUsageMode.Designtime Then
          MessageBox.Show("Designtime mode")
          key = GetRegKey()
                If key <> "" And IsKeyValid(key, type.BaseType) Then
                    lic = New RegLicense(Me, key)
                    context.SetSavedLicenseKey(type.BaseType, lic.LicenseKey)
                End If
            ElseIf context.UsageMode = LicenseUsageMode.Runtime Then
          MessageBox.Show("Runtime mode")
                key = context.GetSavedLicenseKey(type.BaseType, Nothing)
                If (key <> Nothing And IsKeyValid(key, type.BaseType)) Then
                    lic = New RegLicense(Me, key)
                End If
        End If
        Return lic
    'END CODE

    Now, assuming your base type is System.Windows.Forms.UserControl then the
    build number will not change. If the base type is another one of your
    types, and the build number changes, I suspect you will run into the same
    issue. Can you test this to see if it works for you? I tested this by
    just recompiling the assembly containing the licensed control after
    incrementing the revision number. I did not recompile the EXE. If I just
    use 'type' in GetLicense it fails but if I use 'type.BaseType' it doesn't
    fail.

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