CodeConditionStatement and Nullable.Equals

Question

I have to create the following VB.Net code through a C# CodeConditionStatement

If Not Nullable.Equals(field.Name, Value) Then
    ...
End If

What I alredy tried was

var property = new CodeMemberProperty();

CodeExpression condition = new CodeMethodInvokeExpression(System.Nullable,"Equals", new CodeExpression(){
                new CodeVariableReferenceExpression(field.Name),
                new CodePropertySetValueReferenceExpression()
            });

property.SetStatements.Add(new CodeConditionStatement(condition, null));

but a System.Nullable can't be converted in a CodeExpression.

You cannot use `System.Nullable(Of T).Equals` in the way that you are attempting: the code that you want to generate is invalid – no wonder that the generator refuses to generate that code. — Konrad Rudolph, Mar 29 '11 at 12:09
That's why I'm searching a way to generate the Nullable.Equals function through a CodeConditionStatement that is working :D — mr.moe, Mar 29 '11 at 12:33
That won’t work either. The code you want to call simply doesn’t exist. `Nullable` isn’t a complete class, it needs to be `Nullable(Of SomeType)`. — Konrad Rudolph, Mar 29 '11 at 12:34

score 0 · Accepted Answer · answered Mar 30 '11 at 08:11

So this seems to work:

property.SetStatements.Add(new CodeConditionStatement(
                new CodeSnippetExpression(String.Format("Not Nullable.Equals({0}, value)", field.Name)), 
                null));

pretty awful but working.....

If someone has a better idea :D

CodeConditionStatement and Nullable.Equals

1 Answers1