C#+EF 使用SQL计算表达式

/// <summary>
/// C#+EF 使用SQL计算表达式
/// </summary>
/// <param name="expression">表达式，如：100>99</param>
/// <returns></returns>
public bool Eval(string expression)
{
    try
    {
        using (var context = WorkflowDbContext.CreateDbContext(this.DbOption.ConnectionString))
        {
            var sql = $"IF {expression} SELECT 1 ELSE SELECT 0;";
            var cmd = context.Database.Connection.CreateCommand();//创建DbCommand
            cmd.CommandText = sql;
            context.Database.Connection.Open();
            var obj = cmd.ExecuteScalar();
            return obj.ToString() == "1";
        }
    }
    catch
    {
        return false;
    }
}