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entities is not a valid named attribute argument because it is not a . . .
As the error info describes, please check if the 'Entities' field is a valid attribute parameter type in source code Just like the following error code class MyAttribute : Attribute
dictionary contains a null entry for parameter id of non-nullable . . .
The parameters dictionary contains a null entry for parameter 'id' of non-nullable type 'System Int32' for method 'DatabaseService_WebAPI Models Product GetProduct (Int32)' in 'DatabaseService_WebAPI Controllers ProductController' An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter
Unable to cast object of type Oracle. DataAccess. Types. OracleDecimal . . .
I rewrote the Oracle procedure so that it returns one value instead of array of values And called it in a loop So now programm works
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