Assigning a variable enum value

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Cast int to enum in C# 21 answers

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while(reader.Read())
{
   Id = Convert.IsDbNull(reader[0]) ? Convert.ToInt32(0) : Convert.ToInt32(reader[0]);
   Name = Convert.IsDbNull(reader[1]) ? string.Empty : reader[1].ToString();
   FinalOutcome = Convert.IsDbNull(reader[2]) ? FinalOutcome.DontKnow : (Outcome) Convert.ToInt32(reader[2]);
}

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假设你的源列是一个可空的int：

FinalOutcome = !Convert.IsDbNull(reader[2]) ?(OutCome)reader[2] : (OutCome)0;

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