CODEWITHSUNDEEP
asp.netvb.net
chromeOne7
chromeOne7

Reputation: 33

The given key was not present in the dictionary. VB.NET

I'm trying to debug an issue I didnt create and I'm getting the generic error "The given key was not present in the dictionary." Here is the code:

   Dim myInfo As New Dictionary(Of Integer, String)

                        For i As Integer = 0 To Region.GetRegionCount - 1
                            myInfo.Add(i, Server.HtmlEncode(ContentItem.Properties("StoreInfoRegion" & i).Value.ToString))
                        Next

                        Session(SESSION_INFO) = myInfo

When I step thru it the error occurs on the call to "Add", I guess Im confused because it's adding a key not trying to access one.

Thanks!

Upvotes: 0

Views: 6108

Answers (1)

the_lotus
the_lotus

Reputation: 12748

You have a pretty big line of code, split it up into it's pieces and you might find where the problem is exactly.

Instead of 

myInfo.Add(i, Server.HtmlEncode(ContentItem.Properties("StoreInfoRegion" & i).Value.ToString))

Have

Dim propertyValue As String
propertyValue = ContentItem.Properties("StoreInfoRegion" & i).Value.ToString
propertyValue = Server.HtmlEncode(propertyValue)
myInfo.Add(i, propertyValue)

With this change, I'm pretty sure that you will see the error on the 2nd line where you fetch the value of Properties. This mean you do not have a value for "StoreInfoRegion" & i

You could do

If ContentItem.Properties.ContainsKey("StoreInfoRegion" & i) Then
    Dim propertyValue As String
    propertyValue = ContentItem.Properties("StoreInfoRegion" & i).Value.ToString
    propertyValue = Server.HtmlEncode(propertyValue)
    myInfo.Add(i, propertyValue)
End If

But I think you should first understand why there are no value for that key first.

Upvotes: 3

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