CODEWITHSUNDEEP
c#vb.netlambdaexpression
Eduardo Ortega García
Eduardo Ortega García

Reputation: 36

c# Expression lambda to vb.net

After using converters (Redgate, Telerik, ...) I can not turn this expression c # to vb.net

if (afterItemRemoved != null)
        {
            cacheItemPolicy.RemovedCallback = x => afterItemRemoved(
                x.CacheItem.Key,
                (T)x.CacheItem.Value);
        }

I have tried without success the following expressions (Reflector 8.5 de RedGate y converter.telerik.com)

If (afterItemRemoved IsNot Nothing) Then
    cacheItemPolicy.RemovedCallback = x => afterItemRemoved.Invoke(x.CacheItem.Key, DirectCast(x.CacheItem.Value, T))
End If


If afterItemRemoved IsNot Nothing Then
    cacheItemPolicy.RemovedCallback = Function(x) afterItemRemoved(x.CacheItem.Key, DirectCast(x.CacheItem.Value, T))
End If

Upvotes: 1

Views: 139

Answers (1)

Sehnsucht
Sehnsucht

Reputation: 5049

Looking at the documentation for RemovedCallback we can see that the required delegate signature is a void method (A Sub in VB.Net) (see CacheEntryRemovedCallback).

So the lambda expression needed has to be a "Sub Lambda" not a "Function lambda"

If afterItemRemoved IsNot Nothing Then
    cacheItemPolicy.RemoveCallback =
        Sub(x) afterItemRemoved(x.CacheItem.Key, DirectCast(x.CacheItem.Value, T))
End If

Upvotes: 3

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